257 lines
10 KiB
Objective-C
257 lines
10 KiB
Objective-C
//
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// MySkinVC.m
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// keyBoard
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//
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// 我的皮肤列表页（支持编辑多选删除）。
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// 需求要点：
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// - 顶部右侧 Editor/Cancel 切换
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// - CollectionView Masonry 约束 + 懒加载控件
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// - 自定义 cell，编辑态显示左上角选择圆点，支持多选
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// - 底部 bottomView 展示已选择数量与删除按钮，数量>0 时 Delete 变为 #02BEAC 可点
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//
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#import "MySkinVC.h"
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#import <Masonry/Masonry.h>
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#import "UIColor+Extension.h"
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#import "MySkinCell.h"
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static NSString * const kMySkinCellId = @"kMySkinCellId";
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@interface MySkinVC () <UICollectionViewDataSource, UICollectionViewDelegate>
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@property (nonatomic, strong) UICollectionView *collectionView; // 列表
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@property (nonatomic, strong) UIView *bottomView; // 底部操作条
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@property (nonatomic, strong) UILabel *selectedLabel; // 已选择数量
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@property (nonatomic, strong) UIButton *deleteButton; // 删除
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@property (nonatomic, strong) NSMutableArray<NSDictionary *> *data; // 简单数据源
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@property (nonatomic, assign, getter=isEditingMode) BOOL editingMode; // 是否编辑态
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@end
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@implementation MySkinVC
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- (void)viewDidLoad {
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[super viewDidLoad];
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self.view.backgroundColor = [UIColor whiteColor];
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self.title = @"My Skin"; // 标题
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// 右上角 Editor/Cancel
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self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Editor" style:UIBarButtonItemStylePlain target:self action:@selector(onToggleEdit)];
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// 数据源（演示用）
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self.data = [@[
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@{ @"title": @"Dopamine" },
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@{ @"title": @"Dopamine" },
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@{ @"title": @"Dopamine" },
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@{ @"title": @"Dopamine" },
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] mutableCopy];
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// 视图
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[self.view addSubview:self.collectionView];
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[self.view addSubview:self.bottomView];
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[self.collectionView mas_makeConstraints:^(MASConstraintMaker *make) {
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make.top.equalTo(self.view.mas_safeAreaLayoutGuideTop);
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make.left.right.equalTo(self.view);
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make.bottom.equalTo(self.view.mas_bottom); // 底部被 bottomView 覆盖即可
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}];
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[self.bottomView mas_makeConstraints:^(MASConstraintMaker *make) {
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make.left.right.equalTo(self.view);
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make.bottom.equalTo(self.view.mas_safeAreaLayoutGuideBottom);
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make.height.mas_equalTo(64);
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}];
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// 初始：非编辑态，隐藏底部
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self.bottomView.hidden = YES;
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}
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#pragma mark - Actions
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- (void)onToggleEdit {
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self.editingMode = !self.editingMode;
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// 更新顶部按钮
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self.navigationItem.rightBarButtonItem.title = self.isEditingMode ? @"Cancel" : @"Editor";
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// 控制底部栏显隐
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self.bottomView.hidden = !self.isEditingMode;
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// 列表进入/退出多选
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self.collectionView.allowsMultipleSelection = self.isEditingMode;
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// 直接刷新可见 cell，确保切换后立刻出现/隐藏 markView
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for (UICollectionViewCell *c in self.collectionView.visibleCells) {
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if (![c isKindOfClass:MySkinCell.class]) continue;
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MySkinCell *cell = (MySkinCell *)c;
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cell.editing = self.isEditingMode;
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NSIndexPath *ip = [self.collectionView indexPathForCell:cell];
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BOOL selected = [[self.collectionView indexPathsForSelectedItems] containsObject:ip];
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[cell updateSelected:selected];
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}
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// 再做一次 reload 保守刷新（防止 offscreen cell）
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[self.collectionView reloadData];
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// 清空选择并刷新底部文案
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for (NSIndexPath *ip in [self.collectionView indexPathsForSelectedItems]) {
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[self.collectionView deselectItemAtIndexPath:ip animated:NO];
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}
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[self updateBottomUI];
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}
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- (void)onDelete {
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// 根据选中项删除
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NSArray<NSIndexPath *> *selected = [[self.collectionView indexPathsForSelectedItems] sortedArrayUsingSelector:@selector(compare:)];
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if (selected.count == 0) return;
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// 批量更新，先改数据，再删 UI
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[self.collectionView performBatchUpdates:^{
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NSMutableIndexSet *set = [NSMutableIndexSet indexSet];
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for (NSIndexPath *ip in selected) { [set addIndex:ip.item]; }
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[self.data removeObjectsAtIndexes:set];
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[self.collectionView deleteItemsAtIndexPaths:selected];
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} completion:^(BOOL finished) {
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[self updateBottomUI];
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}];
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}
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- (void)updateBottomUI {
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NSInteger count = self.collectionView.indexPathsForSelectedItems.count;
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self.selectedLabel.text = [NSString stringWithFormat:@"Selected: %ld Skins", (long)count];
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BOOL enable = count > 0;
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self.deleteButton.enabled = enable;
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if (enable) {
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self.deleteButton.backgroundColor = [UIColor colorWithHex:0x02BEAC];
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[self.deleteButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
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self.deleteButton.layer.borderColor = [UIColor colorWithHex:0x02BEAC].CGColor;
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} else {
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self.deleteButton.backgroundColor = [UIColor colorWithHex:0xF2F2F2];
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[self.deleteButton setTitleColor:[UIColor colorWithHex:0xC8C8C8] forState:UIControlStateNormal];
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self.deleteButton.layer.borderColor = [UIColor colorWithHex:0xE6E6E6].CGColor;
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}
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}
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#pragma mark - UICollectionView
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- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
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return self.data.count;
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}
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- (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
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MySkinCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:kMySkinCellId forIndexPath:indexPath];
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NSDictionary *d = self.data[indexPath.item];
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[cell configWithTitle:d[@"title"] image:nil];
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cell.editing = self.isEditingMode; // 控制是否显示选择圆点
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// 同步选中状态（复用时）
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BOOL selected = [[collectionView indexPathsForSelectedItems] containsObject:indexPath];
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[cell updateSelected:selected];
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return cell;
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}
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- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
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if (!self.isEditingMode) {
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// 非编辑态：可在此进入详情，当前示例不处理
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[collectionView deselectItemAtIndexPath:indexPath animated:YES];
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return;
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}
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MySkinCell *cell = (MySkinCell *)[collectionView cellForItemAtIndexPath:indexPath];
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[cell updateSelected:YES];
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[self updateBottomUI];
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}
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- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath {
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if (!self.isEditingMode) return;
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MySkinCell *cell = (MySkinCell *)[collectionView cellForItemAtIndexPath:indexPath];
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[cell updateSelected:NO];
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[self updateBottomUI];
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}
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- (void)collectionView:(UICollectionView *)collectionView willDisplayCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath {
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if (![cell isKindOfClass:MySkinCell.class]) return;
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MySkinCell *c = (MySkinCell *)cell;
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c.editing = self.isEditingMode; // 保证滚动出现的新 cell 同步编辑态
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BOOL selected = [[collectionView indexPathsForSelectedItems] containsObject:indexPath];
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[c updateSelected:selected];
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}
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#pragma mark - Lazy
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- (UICollectionView *)collectionView {
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if (!_collectionView) {
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UICollectionViewFlowLayout *layout = [UICollectionViewFlowLayout new];
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CGFloat inset = 16;
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CGFloat spacing = 12;
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CGFloat W = UIScreen.mainScreen.bounds.size.width;
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CGFloat itemW = floor((W - inset * 2 - spacing) / 2.0);
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CGFloat itemH = itemW * 0.82f; // 接近截图比例
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layout.itemSize = CGSizeMake(itemW, itemH);
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layout.minimumInteritemSpacing = spacing;
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layout.minimumLineSpacing = spacing;
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layout.sectionInset = UIEdgeInsetsMake(12, inset, 12, inset);
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_collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:layout];
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_collectionView.backgroundColor = [UIColor whiteColor];
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_collectionView.dataSource = self;
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_collectionView.delegate = self;
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_collectionView.allowsMultipleSelection = NO; // 初始
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[_collectionView registerClass:MySkinCell.class forCellWithReuseIdentifier:kMySkinCellId];
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}
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return _collectionView;
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}
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- (UIView *)bottomView {
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if (!_bottomView) {
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_bottomView = [UIView new];
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_bottomView.backgroundColor = [UIColor whiteColor];
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_bottomView.layer.shadowColor = [UIColor colorWithWhite:0 alpha:0.06].CGColor;
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_bottomView.layer.shadowOpacity = 1;
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_bottomView.layer.shadowOffset = CGSizeMake(0, -2);
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[_bottomView addSubview:self.selectedLabel];
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[_bottomView addSubview:self.deleteButton];
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[self.selectedLabel mas_makeConstraints:^(MASConstraintMaker *make) {
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make.left.equalTo(_bottomView).offset(16);
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make.centerY.equalTo(_bottomView);
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}];
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[self.deleteButton mas_makeConstraints:^(MASConstraintMaker *make) {
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make.right.equalTo(_bottomView).offset(-16);
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make.centerY.equalTo(_bottomView);
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make.width.mas_equalTo(92);
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make.height.mas_equalTo(36);
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}];
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}
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return _bottomView;
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}
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- (UILabel *)selectedLabel {
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if (!_selectedLabel) {
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_selectedLabel = [UILabel new];
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_selectedLabel.textColor = [UIColor colorWithHex:0x666666];
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_selectedLabel.font = [UIFont systemFontOfSize:14 weight:UIFontWeightMedium];
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_selectedLabel.text = @"Selected: 0 Skins";
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}
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return _selectedLabel;
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}
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- (UIButton *)deleteButton {
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if (!_deleteButton) {
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_deleteButton = [UIButton buttonWithType:UIButtonTypeSystem];
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[_deleteButton setTitle:@"Delete" forState:UIControlStateNormal];
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_deleteButton.titleLabel.font = [UIFont systemFontOfSize:16 weight:UIFontWeightSemibold];
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_deleteButton.layer.cornerRadius = 18;
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_deleteButton.layer.borderWidth = 1;
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_deleteButton.clipsToBounds = YES;
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[_deleteButton addTarget:self action:@selector(onDelete) forControlEvents:UIControlEventTouchUpInside];
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// 初始禁用态样式
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_deleteButton.enabled = NO;
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_deleteButton.backgroundColor = [UIColor colorWithHex:0xF2F2F2];
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[_deleteButton setTitleColor:[UIColor colorWithHex:0xC8C8C8] forState:UIControlStateNormal];
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_deleteButton.layer.borderColor = [UIColor colorWithHex:0xE6E6E6].CGColor;
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}
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return _deleteButton;
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}
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@end
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