637 lines
19 KiB
Objective-C
637 lines
19 KiB
Objective-C
//
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// KBAICommentView.m
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// keyBoard
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//
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// Created by Mac on 2026/1/16.
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//
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#import "KBAICommentView.h"
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#import "KBAICommentFooterView.h"
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#import "KBAICommentHeaderView.h"
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#import "KBAICommentInputView.h"
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#import "KBAICommentModel.h"
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#import "KBAIReplyCell.h"
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#import "KBAIReplyModel.h"
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#import <MJExtension/MJExtension.h>
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#import <Masonry/Masonry.h>
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static NSString *const kCommentHeaderIdentifier = @"CommentHeader";
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static NSString *const kReplyCellIdentifier = @"ReplyCell";
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static NSString *const kCommentFooterIdentifier = @"CommentFooter";
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@interface KBAICommentView () <UITableViewDataSource, UITableViewDelegate>
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@property(nonatomic, strong) UIView *headerView;
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@property(nonatomic, strong) UILabel *titleLabel;
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@property(nonatomic, strong) UIButton *closeButton;
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@property(nonatomic, strong) BaseTableView *tableView;
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@property(nonatomic, strong) KBAICommentInputView *inputView;
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@property(nonatomic, strong) NSMutableArray<KBAICommentModel *> *comments;
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@property(nonatomic, assign) NSInteger totalCommentCount;
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/// 键盘高度
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@property(nonatomic, assign) CGFloat keyboardHeight;
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/// 输入框底部约束
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@property(nonatomic, strong) MASConstraint *inputBottomConstraint;
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/// 当前回复的目标（一级评论）
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@property(nonatomic, weak) KBAICommentModel *replyToComment;
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/// 当前回复的目标（二级评论）
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@property(nonatomic, weak) KBAIReplyModel *replyToReply;
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@end
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@implementation KBAICommentView
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#pragma mark - Lifecycle
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- (instancetype)initWithFrame:(CGRect)frame {
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self = [super initWithFrame:frame];
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if (self) {
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self.comments = [NSMutableArray array];
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[self setupUI];
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[self setupKeyboardObservers];
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[self loadComments];
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}
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return self;
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}
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- (void)dealloc {
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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#pragma mark - UI Setup
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- (void)setupUI {
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self.backgroundColor = [UIColor whiteColor];
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self.layer.cornerRadius = 12;
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self.layer.maskedCorners = kCALayerMinXMinYCorner | kCALayerMaxXMinYCorner;
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self.clipsToBounds = YES;
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[self addSubview:self.headerView];
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[self.headerView addSubview:self.titleLabel];
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[self.headerView addSubview:self.closeButton];
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[self addSubview:self.tableView];
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[self addSubview:self.inputView];
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[self.headerView mas_makeConstraints:^(MASConstraintMaker *make) {
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make.top.left.right.equalTo(self);
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make.height.mas_equalTo(50);
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}];
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[self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
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make.center.equalTo(self.headerView);
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}];
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[self.closeButton mas_makeConstraints:^(MASConstraintMaker *make) {
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make.right.equalTo(self.headerView).offset(-16);
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make.centerY.equalTo(self.headerView);
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make.width.height.mas_equalTo(30);
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}];
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[self.inputView mas_makeConstraints:^(MASConstraintMaker *make) {
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make.left.right.equalTo(self);
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make.height.mas_equalTo(50);
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self.inputBottomConstraint = make.bottom.equalTo(self).offset(-KB_SafeAreaBottom());
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}];
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[self.tableView mas_makeConstraints:^(MASConstraintMaker *make) {
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make.top.equalTo(self.headerView.mas_bottom);
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make.left.right.equalTo(self);
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make.bottom.equalTo(self.inputView.mas_top);
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}];
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}
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#pragma mark - Keyboard Observers
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- (void)setupKeyboardObservers {
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[[NSNotificationCenter defaultCenter]
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addObserver:self
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selector:@selector(keyboardWillShow:)
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name:UIKeyboardWillShowNotification
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object:nil];
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[[NSNotificationCenter defaultCenter]
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addObserver:self
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selector:@selector(keyboardWillHide:)
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name:UIKeyboardWillHideNotification
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object:nil];
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}
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- (void)keyboardWillShow:(NSNotification *)notification {
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CGRect keyboardFrame =
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[notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
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NSTimeInterval duration =
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[notification.userInfo[UIKeyboardAnimationDurationUserInfoKey]
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doubleValue];
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self.keyboardHeight = keyboardFrame.size.height;
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[self.inputBottomConstraint uninstall];
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[self.inputView mas_updateConstraints:^(MASConstraintMaker *make) {
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self.inputBottomConstraint =
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make.bottom.equalTo(self).offset(-self.keyboardHeight);
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}];
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[UIView animateWithDuration:duration
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animations:^{
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[self layoutIfNeeded];
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}];
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}
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- (void)keyboardWillHide:(NSNotification *)notification {
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NSTimeInterval duration =
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[notification.userInfo[UIKeyboardAnimationDurationUserInfoKey]
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doubleValue];
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self.keyboardHeight = 0;
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[self.inputBottomConstraint uninstall];
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[self.inputView mas_updateConstraints:^(MASConstraintMaker *make) {
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self.inputBottomConstraint = make.bottom.equalTo(self);
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}];
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[UIView animateWithDuration:duration
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animations:^{
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[self layoutIfNeeded];
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}];
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}
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#pragma mark - Data Loading
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- (void)loadComments {
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NSString *filePath = [[NSBundle mainBundle] pathForResource:@"comments_mock"
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ofType:@"json"];
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if (!filePath) {
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NSLog(@"[KBAICommentView] comments_mock.json not found");
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return;
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}
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NSData *data = [NSData dataWithContentsOfFile:filePath];
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if (!data) {
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NSLog(@"[KBAICommentView] Failed to read comments_mock.json");
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return;
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}
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NSError *error;
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NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data
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options:0
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error:&error];
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if (error) {
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NSLog(@"[KBAICommentView] JSON parse error: %@", error);
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return;
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}
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self.totalCommentCount = [json[@"totalCount"] integerValue];
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NSArray *commentsArray = json[@"comments"];
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[self.comments removeAllObjects];
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// 获取 tableView 宽度用于计算高度
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CGFloat tableWidth = self.tableView.bounds.size.width;
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if (tableWidth <= 0) {
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tableWidth = [UIScreen mainScreen].bounds.size.width;
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}
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for (NSDictionary *dict in commentsArray) {
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KBAICommentModel *comment = [KBAICommentModel mj_objectWithKeyValues:dict];
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// 预先计算并缓存 Header 高度
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comment.cachedHeaderHeight = [comment calculateHeaderHeightWithMaxWidth:tableWidth];
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// 预先计算并缓存所有 Reply 高度
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for (KBAIReplyModel *reply in comment.replies) {
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reply.cachedCellHeight = [reply calculateCellHeightWithMaxWidth:tableWidth];
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}
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[self.comments addObject:comment];
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}
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[self updateTitle];
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[self.tableView reloadData];
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}
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- (void)updateTitle {
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NSString *countText;
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if (self.totalCommentCount >= 10000) {
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countText = [NSString
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stringWithFormat:@"%.1fw条评论", self.totalCommentCount / 10000.0];
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} else {
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countText =
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[NSString stringWithFormat:@"%ld条评论", (long)self.totalCommentCount];
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}
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self.titleLabel.text = countText;
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}
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#pragma mark - UITableViewDataSource
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- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
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return self.comments.count;
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}
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- (NSInteger)tableView:(UITableView *)tableView
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numberOfRowsInSection:(NSInteger)section {
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KBAICommentModel *comment = self.comments[section];
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return comment.displayedReplies.count;
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}
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- (UITableViewCell *)tableView:(UITableView *)tableView
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cellForRowAtIndexPath:(NSIndexPath *)indexPath {
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KBAIReplyCell *cell =
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[tableView dequeueReusableCellWithIdentifier:kReplyCellIdentifier
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forIndexPath:indexPath];
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KBAICommentModel *comment = self.comments[indexPath.section];
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KBAIReplyModel *reply = comment.displayedReplies[indexPath.row];
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[cell configureWithReply:reply];
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__weak typeof(self) weakSelf = self;
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cell.onLikeAction = ^{
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// TODO: 处理点赞逻辑
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reply.isLiked = !reply.isLiked;
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reply.likeCount += reply.isLiked ? 1 : -1;
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[weakSelf.tableView reloadRowsAtIndexPaths:@[ indexPath ]
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withRowAnimation:UITableViewRowAnimationNone];
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};
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cell.onReplyAction = ^{
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[weakSelf setReplyToComment:comment reply:reply];
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};
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return cell;
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}
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#pragma mark - UITableViewDelegate
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- (UIView *)tableView:(UITableView *)tableView
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viewForHeaderInSection:(NSInteger)section {
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KBAICommentHeaderView *header = [tableView
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dequeueReusableHeaderFooterViewWithIdentifier:kCommentHeaderIdentifier];
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KBAICommentModel *comment = self.comments[section];
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[header configureWithComment:comment];
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__weak typeof(self) weakSelf = self;
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header.onLikeAction = ^{
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// TODO: 处理点赞逻辑
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comment.isLiked = !comment.isLiked;
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comment.likeCount += comment.isLiked ? 1 : -1;
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[weakSelf.tableView reloadSections:[NSIndexSet indexSetWithIndex:section]
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withRowAnimation:UITableViewRowAnimationNone];
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};
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header.onReplyAction = ^{
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[weakSelf setReplyToComment:comment reply:nil];
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};
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return header;
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}
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- (UIView *)tableView:(UITableView *)tableView
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viewForFooterInSection:(NSInteger)section {
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KBAICommentModel *comment = self.comments[section];
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KBAIReplyFooterState state = [comment footerState];
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// 无二级评论时返回空视图
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if (state == KBAIReplyFooterStateHidden) {
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return nil;
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}
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KBAICommentFooterView *footer = [tableView
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dequeueReusableHeaderFooterViewWithIdentifier:kCommentFooterIdentifier];
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[footer configureWithComment:comment];
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__weak typeof(self) weakSelf = self;
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footer.onAction = ^{
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[weakSelf handleFooterActionForSection:section];
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};
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return footer;
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}
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- (CGFloat)tableView:(UITableView *)tableView
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heightForHeaderInSection:(NSInteger)section {
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KBAICommentModel *comment = self.comments[section];
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return comment.cachedHeaderHeight;
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}
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- (CGFloat)tableView:(UITableView *)tableView
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heightForRowAtIndexPath:(NSIndexPath *)indexPath {
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KBAICommentModel *comment = self.comments[indexPath.section];
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KBAIReplyModel *reply = comment.displayedReplies[indexPath.row];
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return reply.cachedCellHeight;
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}
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- (CGFloat)tableView:(UITableView *)tableView
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heightForFooterInSection:(NSInteger)section {
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KBAICommentModel *comment = self.comments[section];
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KBAIReplyFooterState state = [comment footerState];
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if (state == KBAIReplyFooterStateHidden) {
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return CGFLOAT_MIN;
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}
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return 30;
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}
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#pragma mark - Footer Actions
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/// 每次加载的回复数量
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static NSInteger const kRepliesLoadCount = 5;
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- (void)handleFooterActionForSection:(NSInteger)section {
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KBAICommentModel *comment = self.comments[section];
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KBAIReplyFooterState state = [comment footerState];
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switch (state) {
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case KBAIReplyFooterStateExpand:
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case KBAIReplyFooterStateLoadMore: {
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[self loadMoreRepliesForSection:section];
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break;
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}
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case KBAIReplyFooterStateCollapse: {
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[self collapseRepliesForSection:section];
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break;
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}
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default:
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break;
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}
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}
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- (void)loadMoreRepliesForSection:(NSInteger)section {
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KBAICommentModel *comment = self.comments[section];
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NSInteger currentCount = comment.displayedReplies.count;
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// 加载更多回复
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[comment loadMoreReplies:kRepliesLoadCount];
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// 计算新增的行
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NSInteger newCount = comment.displayedReplies.count;
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NSMutableArray *insertIndexPaths = [NSMutableArray array];
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for (NSInteger i = currentCount; i < newCount; i++) {
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[insertIndexPaths addObject:[NSIndexPath indexPathForRow:i inSection:section]];
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}
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// 插入行（不刷新 Header，避免头像闪烁）
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[self.tableView beginUpdates];
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if (insertIndexPaths.count > 0) {
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[self.tableView insertRowsAtIndexPaths:insertIndexPaths
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withRowAnimation:UITableViewRowAnimationAutomatic];
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}
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[self.tableView endUpdates];
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// 手动刷新 Footer
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KBAICommentFooterView *footerView =
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(KBAICommentFooterView *)[self.tableView footerViewForSection:section];
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if (footerView) {
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[footerView configureWithComment:comment];
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}
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}
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- (void)collapseRepliesForSection:(NSInteger)section {
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KBAICommentModel *comment = self.comments[section];
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NSInteger rowCount = comment.displayedReplies.count;
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// 计算要删除的行
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NSMutableArray *deleteIndexPaths = [NSMutableArray array];
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for (NSInteger i = 0; i < rowCount; i++) {
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[deleteIndexPaths addObject:[NSIndexPath indexPathForRow:i inSection:section]];
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}
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// 收起全部回复
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[comment collapseReplies];
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// 删除行（不刷新 Header，避免头像闪烁）
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[self.tableView beginUpdates];
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if (deleteIndexPaths.count > 0) {
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[self.tableView deleteRowsAtIndexPaths:deleteIndexPaths
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withRowAnimation:UITableViewRowAnimationAutomatic];
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}
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[self.tableView endUpdates];
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// 手动刷新 Footer
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KBAICommentFooterView *footerView =
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(KBAICommentFooterView *)[self.tableView footerViewForSection:section];
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if (footerView) {
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[footerView configureWithComment:comment];
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}
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}
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#pragma mark - Actions
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- (void)closeButtonTapped {
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// 关闭评论视图（由外部处理）
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[[NSNotificationCenter defaultCenter]
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postNotificationName:@"KBAICommentViewCloseNotification"
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object:nil];
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}
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#pragma mark - Lazy Loading
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- (UIView *)headerView {
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if (!_headerView) {
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_headerView = [[UIView alloc] init];
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_headerView.backgroundColor = [UIColor whiteColor];
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}
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return _headerView;
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}
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- (UILabel *)titleLabel {
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if (!_titleLabel) {
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_titleLabel = [[UILabel alloc] init];
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_titleLabel.font = [UIFont systemFontOfSize:15 weight:UIFontWeightMedium];
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_titleLabel.textColor = [UIColor labelColor];
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_titleLabel.text = @"0条评论";
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}
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return _titleLabel;
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}
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- (UIButton *)closeButton {
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if (!_closeButton) {
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_closeButton = [UIButton buttonWithType:UIButtonTypeCustom];
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[_closeButton setImage:[UIImage systemImageNamed:@"xmark"]
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forState:UIControlStateNormal];
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_closeButton.tintColor = [UIColor labelColor];
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[_closeButton addTarget:self
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action:@selector(closeButtonTapped)
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forControlEvents:UIControlEventTouchUpInside];
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}
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return _closeButton;
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}
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- (BaseTableView *)tableView {
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if (!_tableView) {
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_tableView = [[BaseTableView alloc] initWithFrame:CGRectZero
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style:UITableViewStyleGrouped];
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_tableView.dataSource = self;
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_tableView.delegate = self;
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_tableView.backgroundColor = [UIColor whiteColor];
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_tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
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_tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;
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// 注册 Header/Cell/Footer
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[_tableView registerClass:[KBAICommentHeaderView class]
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forHeaderFooterViewReuseIdentifier:kCommentHeaderIdentifier];
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[_tableView registerClass:[KBAIReplyCell class]
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forCellReuseIdentifier:kReplyCellIdentifier];
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[_tableView registerClass:[KBAICommentFooterView class]
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forHeaderFooterViewReuseIdentifier:kCommentFooterIdentifier];
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// 去掉顶部间距
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if (@available(iOS 15.0, *)) {
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_tableView.sectionHeaderTopPadding = 0;
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}
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}
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return _tableView;
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}
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- (KBAICommentInputView *)inputView {
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if (!_inputView) {
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_inputView = [[KBAICommentInputView alloc] init];
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_inputView.placeholder = @"说点什么...";
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__weak typeof(self) weakSelf = self;
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_inputView.onSend = ^(NSString *text) {
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[weakSelf sendCommentWithText:text];
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};
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}
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return _inputView;
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}
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#pragma mark - Reply
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- (void)setReplyToComment:(KBAICommentModel *)comment reply:(KBAIReplyModel *)reply {
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self.replyToComment = comment;
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self.replyToReply = reply;
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if (reply) {
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// 回复二级评论
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self.inputView.placeholder = [NSString stringWithFormat:@"回复 @%@", reply.userName];
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} else if (comment) {
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// 回复一级评论
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self.inputView.placeholder = [NSString stringWithFormat:@"回复 @%@", comment.userName];
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} else {
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// 普通评论
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self.inputView.placeholder = @"说点什么...";
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}
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}
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- (void)clearReplyTarget {
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self.replyToComment = nil;
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self.replyToReply = nil;
|
||
self.inputView.placeholder = @"说点什么...";
|
||
}
|
||
|
||
#pragma mark - Send Comment
|
||
|
||
- (void)sendCommentWithText:(NSString *)text {
|
||
if (text.length == 0) return;
|
||
|
||
CGFloat tableWidth = self.tableView.bounds.size.width;
|
||
if (tableWidth <= 0) {
|
||
tableWidth = [UIScreen mainScreen].bounds.size.width;
|
||
}
|
||
|
||
if (self.replyToComment) {
|
||
// 回复评论（添加二级评论）
|
||
[self sendReplyWithText:text tableWidth:tableWidth];
|
||
} else {
|
||
// 发送一级评论
|
||
[self sendNewCommentWithText:text tableWidth:tableWidth];
|
||
}
|
||
|
||
// 清空输入框和回复目标
|
||
[self.inputView clearText];
|
||
[self clearReplyTarget];
|
||
}
|
||
|
||
- (void)sendNewCommentWithText:(NSString *)text tableWidth:(CGFloat)tableWidth {
|
||
// 创建新一级评论
|
||
KBAICommentModel *newComment = [[KBAICommentModel alloc] init];
|
||
newComment.commentId = [NSUUID UUID].UUIDString;
|
||
newComment.userId = @"current_user";
|
||
newComment.userName = @"我";
|
||
newComment.avatarUrl = @"";
|
||
newComment.content = text;
|
||
newComment.likeCount = 0;
|
||
newComment.isLiked = NO;
|
||
newComment.createTime = [[NSDate date] timeIntervalSince1970];
|
||
newComment.replies = @[];
|
||
|
||
// 计算高度缓存
|
||
newComment.cachedHeaderHeight = [newComment calculateHeaderHeightWithMaxWidth:tableWidth];
|
||
|
||
// 插入到数组第一个
|
||
[self.comments insertObject:newComment atIndex:0];
|
||
self.totalCommentCount++;
|
||
[self updateTitle];
|
||
|
||
// 插入新 section
|
||
[self.tableView insertSections:[NSIndexSet indexSetWithIndex:0]
|
||
withRowAnimation:UITableViewRowAnimationAutomatic];
|
||
|
||
// 滚动到顶部
|
||
[self.tableView setContentOffset:CGPointZero animated:YES];
|
||
}
|
||
|
||
- (void)sendReplyWithText:(NSString *)text tableWidth:(CGFloat)tableWidth {
|
||
KBAICommentModel *comment = self.replyToComment;
|
||
if (!comment) return;
|
||
|
||
// 创建新二级评论
|
||
KBAIReplyModel *newReply = [[KBAIReplyModel alloc] init];
|
||
newReply.replyId = [NSUUID UUID].UUIDString;
|
||
newReply.userId = @"current_user";
|
||
newReply.userName = @"我";
|
||
newReply.avatarUrl = @"";
|
||
newReply.content = text;
|
||
newReply.likeCount = 0;
|
||
newReply.isLiked = NO;
|
||
newReply.createTime = [[NSDate date] timeIntervalSince1970];
|
||
|
||
// 如果是回复二级评论，设置被回复用户
|
||
if (self.replyToReply) {
|
||
newReply.replyToUserName = self.replyToReply.userName;
|
||
}
|
||
|
||
// 计算高度缓存
|
||
newReply.cachedCellHeight = [newReply calculateCellHeightWithMaxWidth:tableWidth];
|
||
|
||
// 添加到 replies 数组
|
||
NSMutableArray *newReplies = [NSMutableArray arrayWithArray:comment.replies];
|
||
[newReplies addObject:newReply];
|
||
comment.replies = newReplies;
|
||
comment.totalReplyCount = newReplies.count;
|
||
|
||
// 找到该评论的 section
|
||
NSInteger section = [self.comments indexOfObject:comment];
|
||
if (section == NSNotFound) return;
|
||
|
||
// 如果已展开，添加到 displayedReplies 并插入行
|
||
if (comment.isRepliesExpanded) {
|
||
NSInteger newRowIndex = comment.displayedReplies.count;
|
||
[comment.displayedReplies addObject:newReply];
|
||
|
||
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:newRowIndex inSection:section];
|
||
[self.tableView insertRowsAtIndexPaths:@[indexPath]
|
||
withRowAnimation:UITableViewRowAnimationAutomatic];
|
||
|
||
// 刷新 Footer
|
||
KBAICommentFooterView *footerView =
|
||
(KBAICommentFooterView *)[self.tableView footerViewForSection:section];
|
||
if (footerView) {
|
||
[footerView configureWithComment:comment];
|
||
}
|
||
|
||
// 滚动到新回复
|
||
[self.tableView scrollToRowAtIndexPath:indexPath
|
||
atScrollPosition:UITableViewScrollPositionBottom
|
||
animated:YES];
|
||
} else {
|
||
// 未展开，刷新 Footer 显示新的回复数
|
||
KBAICommentFooterView *footerView =
|
||
(KBAICommentFooterView *)[self.tableView footerViewForSection:section];
|
||
if (footerView) {
|
||
[footerView configureWithComment:comment];
|
||
}
|
||
}
|
||
}
|
||
|
||
@end
|