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keyBoard/Class/Home/V/KBPanModalView.h

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+//
+//  KBPanModalView.h
+//  keyBoard
+//
+//  Created by Mac on 2025/11/6.
+//
+
+#import <UIKit/UIKit.h>
+#import <HWPanModal/HWPanModal.h>
+
+#import "HWPanModalContentView.h"
+NS_ASSUME_NONNULL_BEGIN
+
+@interface KBPanModalView : HWPanModalContentView<HWPanModalPresentable>
+@property (nonatomic, assign) CGFloat minHeight;  // 例如 150
+@property (nonatomic, assign) CGFloat topInset;   // 例如 100
+@end
+
+NS_ASSUME_NONNULL_END

keyBoard/Class/Home/V/KBPanModalView.m

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+//
+//  KBPanModalView.m
+//  keyBoard
+//
+//  Created by Mac on 2025/11/6.
+//
+
+#import "KBPanModalView.h"
+#import "KBDirectionIndicatorView.h"
+// 子控制器
+#import "HomeHotVC.h"
+#import "HomeRankVC.h"
+@interface KBPanModalView()
+@property (nonatomic, strong) KBDirectionIndicatorView *indicator;
+// 顶部切换按钮与指示条
+@property (nonatomic, strong) UIView *topBar;
+@property (nonatomic, strong) UIButton *hotButton;
+@property (nonatomic, strong) UIButton *rankButton;
+@property (nonatomic, strong) UIView *underlineView; // 选中下划线
+
+// 承载子控制器内容
+@property (nonatomic, strong) UIView *containerView;
+@property (nonatomic, strong) UIViewController *currentChild;
+@property (nonatomic, strong) HomeHotVC *hotVC;
+@property (nonatomic, strong) HomeRankVC *rankVC;
+@end
+@implementation KBPanModalView
+
+- (instancetype)initWithFrame:(CGRect)frame{
+    if (self = [super initWithFrame:frame]) {
+        self.backgroundColor = [UIColor redColor];
+        HWBackgroundConfig *config = [HWBackgroundConfig configWithBehavior:HWBackgroundBehaviorDefault];
+        config = [HWBackgroundConfig configWithBehavior:HWBackgroundBehaviorDefault];
+        config.backgroundAlpha = 0.01;
+        [self.hw_dimmedView reloadConfig:config];
+        // 顶部按钮 + 容器
+        [self setupTopButtonsAndContainer];
+        // 默认展示“热门”
+        [self switchToIndex:0 animated:NO];
+    }
+    return self;
+}
+
+- (UIView<HWPanModalIndicatorProtocol> *)customIndicatorView {
+    if (!_indicator) _indicator = [KBDirectionIndicatorView new];
+    return _indicator;
+}
+
+//- (void)panModalTransitionDidFinish {
+//    // 初次展示后按当前状态设定一次朝向
+//    [self.indicator applyPresentationState:self.hw_presentationState];
+//    // 避免出现内容随弹窗上移的“位移动画”观感：
+//    // 顶部栏在展示动画期间先隐藏，待完成后淡入
+//    if (self.topBar && self.topBar.alpha < 1.0) {
+//        [UIView animateWithDuration:0.18 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
+//            self.topBar.alpha = 1.0;
+//        } completion:nil];
+//    }
+//}
+
+- (void)didChangeTransitionToState:(PresentationState)state {
+//    // 每次状态切换完成后刷新朝向
+//    [self.indicator applyPresentationState:state];
+}
+
+- (PanModalHeight)shortFormHeight {
+    return PanModalHeightMake(PanModalHeightTypeContent, self.minHeight ?: 300);
+}
+
+- (PanModalHeight)longFormHeight {
+    return PanModalHeightMake(PanModalHeightTypeMaxTopInset, self.topInset ?: 100);
+}
+
+- (PresentationState)originPresentationState {
+    return PresentationStateShort; // 初始就以最小高度展示
+}
+
+- (BOOL)anchorModalToLongForm {
+    return YES; // 到 long 后不再继续往上拖
+}
+
+- (BOOL)allowsPullDownWhenShortState {
+    return NO; // 在 short 状态禁止继续往下拉（锁住最小高度）
+}
+
+/// 允许时间穿透
+- (BOOL)allowsTouchEventsPassingThroughTransitionView {
+    return YES;
+}
+
+-(BOOL)shouldAutoSetPanScrollContentInset{
+    return NO;
+}
+
+
+- (UIScrollView *)panScrollable {
+    return self.hotVC.tableView;
+}
+
+// 可选：完全不允许拖拽关闭（避免被拉到底消失）
+- (BOOL)allowsDragToDismiss {
+    return NO;
+}
+//
+//- (BOOL)showDragIndicator{
+//    return NO;
+//}
+//
+// 点背景不关闭
+- (BOOL)allowsTapBackgroundToDismiss {
+    return NO;
+}
+
+// 出现时不做上推动画（瞬时到位）开了下拉动画有问题
+//- (NSTimeInterval)transitionDuration {
+//    return 0;
+//}
+
+//// 可选：关闭触觉反馈，避免出现时的轻微震动
+//- (BOOL)isHapticFeedbackEnabled {
+//    return NO;
+//}
+
+
+#pragma mark - UI
+
+- (void)setupTopButtonsAndContainer {
+    // 顶部栏
+    self.topBar = [[UIView alloc] init];
+    self.topBar.backgroundColor = [UIColor colorWithWhite:1 alpha:0.9];
+    [self addSubview:self.topBar];
+    // 首次展示时先隐藏，待转场完成后再淡入，避免“自底向上滑入”的错觉
+    self.topBar.alpha = 0.0;
+    
+    // 两个按钮
+    self.hotButton = [UIButton buttonWithType:UIButtonTypeCustom];
+    [self.hotButton setTitle:@"热门" forState:UIControlStateNormal];
+    [self.hotButton setTitleColor:[UIColor darkTextColor] forState:UIControlStateNormal];
+    [self.hotButton setTitleColor:[UIColor blackColor] forState:UIControlStateSelected];
+    self.hotButton.titleLabel.font = [UIFont boldSystemFontOfSize:16];
+    self.hotButton.tag = 0;
+    [self.hotButton addTarget:self action:@selector(onTapTopButton:) forControlEvents:UIControlEventTouchUpInside];
+    [self.topBar addSubview:self.hotButton];
+    
+    self.rankButton = [UIButton buttonWithType:UIButtonTypeCustom];
+    [self.rankButton setTitle:@"排行" forState:UIControlStateNormal];
+    [self.rankButton setTitleColor:[UIColor darkTextColor] forState:UIControlStateNormal];
+    [self.rankButton setTitleColor:[UIColor blackColor] forState:UIControlStateSelected];
+    self.rankButton.titleLabel.font = [UIFont boldSystemFontOfSize:16];
+    self.rankButton.tag = 1;
+    [self.rankButton addTarget:self action:@selector(onTapTopButton:) forControlEvents:UIControlEventTouchUpInside];
+    [self.topBar addSubview:self.rankButton];
+    
+    // 下划线（跟随选中按钮）
+    self.underlineView = [[UIView alloc] init];
+    self.underlineView.backgroundColor = [UIColor blackColor];
+    self.underlineView.layer.cornerRadius = 1.0;
+    [self.topBar addSubview:self.underlineView];
+    
+    // 容器视图
+    self.containerView = [[UIView alloc] init];
+    self.containerView.backgroundColor = [UIColor whiteColor];
+    self.containerView.clipsToBounds = YES;
+    [self addSubview:self.containerView];
+    
+    // Masonry 约束
+    CGFloat topPadding = 12; // 与顶部小指示器留点空间
+    [self.topBar mas_makeConstraints:^(MASConstraintMaker *make) {
+        make.left.right.equalTo(self);
+        make.top.equalTo(self).offset(topPadding);
+        make.height.mas_equalTo(44);
+    }];
+    
+    [self.hotButton mas_makeConstraints:^(MASConstraintMaker *make) {
+        make.top.bottom.equalTo(self.topBar);
+        make.left.equalTo(self.topBar);
+    }];
+    [self.rankButton mas_makeConstraints:^(MASConstraintMaker *make) {
+        make.top.bottom.equalTo(self.topBar);
+        make.right.equalTo(self.topBar);
+        make.left.equalTo(self.hotButton.mas_right);
+        make.width.equalTo(self.hotButton);
+    }];
+    
+    // 初始先放在“热门”下方，宽度稍小于按钮文字
+    [self.underlineView mas_makeConstraints:^(MASConstraintMaker *make) {
+        make.height.mas_equalTo(2);
+        make.bottom.equalTo(self.topBar.mas_bottom).offset(-2);
+        make.centerX.equalTo(self.hotButton);
+        make.width.mas_equalTo(24);
+    }];
+    
+    [self.containerView mas_makeConstraints:^(MASConstraintMaker *make) {
+        make.top.equalTo(self.topBar.mas_bottom).offset(8);
+        make.left.right.bottom.equalTo(self);
+    }];
+}
+
+#pragma mark - Action
+
+- (void)onTapTopButton:(UIButton *)sender {
+    [self switchToIndex:sender.tag animated:YES];
+    [self hw_panModalSetNeedsLayoutUpdate];
+}
+
+#pragma mark - Switch Child
+
+- (void)switchToIndex:(NSInteger)index animated:(BOOL)animated {
+    UIViewController *target = (index == 0) ? self.hotVC : self.rankVC;
+    if (!target) {
+        if (index == 0) {
+            self.hotVC = [HomeHotVC new];
+            target = self.hotVC;
+        } else {
+            self.rankVC = [HomeRankVC new];
+            target = self.rankVC;
+        }
+    }
+    
+    if (self.currentChild == target) {
+        // 已经是目标
+        [self updateButtonStateForIndex:index animated:animated];
+        return;
+    }
+    
+    // 移除当前
+    if (self.currentChild) {
+        [self.currentChild willMoveToParentViewController:nil];
+        [self.currentChild.view removeFromSuperview];
+        [self.currentChild removeFromParentViewController];
+    }
+    
+    // 添加目标
+//    [self addChildViewController:target];
+    [self.containerView addSubview:target.view];
+    target.view.backgroundColor = [UIColor colorWithWhite:0.98 alpha:1];
+    [target.view mas_makeConstraints:^(MASConstraintMaker *make) {
+        make.edges.equalTo(self.containerView);
+    }];
+    [target didMoveToParentViewController:self];
+    self.currentChild = target;
+    
+    [self updateButtonStateForIndex:index animated:animated];
+}
+
+- (void)updateButtonStateForIndex:(NSInteger)index animated:(BOOL)animated {
+    self.hotButton.selected = (index == 0);
+    self.rankButton.selected = (index == 1);
+    
+    UIButton *btn = (index == 0) ? self.hotButton : self.rankButton;
+    // 更新下划线位置
+    [self.underlineView mas_remakeConstraints:^(MASConstraintMaker *make) {
+        make.height.mas_equalTo(2);
+        make.bottom.equalTo(self.topBar.mas_bottom).offset(-2);
+        make.centerX.equalTo(btn);
+        make.width.mas_equalTo(24);
+    }];
+    
+    if (animated) {
+        [UIView animateWithDuration:0.25 animations:^{
+            [self.topBar layoutIfNeeded];
+        }];
+    } else {
+        [self.topBar layoutIfNeeded];
+    }
+}
+@end