UIScrollView 子视图上的触摸事件

Posted 2023-03-16

【中文标题】UIScrollView 子视图上的触摸事件

【英文标题】：Touch event on subviews on UIScrollView

【发布时间】：2014-02-19 09:04:46

【问题描述】：

我在 UIScrollView 中创建了许多子视图。让我将每个子视图称为Cell。每个单元格中都有一个 UILabel。

然后我在 Cell 类上实现 touchEnd 方法，希望我的应用程序能够在我点击任何单元格时响应我的触摸。但是，我无法得到所有单元格的响应。我只能从 ScrollView 中手机底部上方的单元格（iPhone 5 是 568 的东西）获得响应，而我的 ScrollView 的内容大小是 2300 * 1000，这意味着 y = 568 以下的单元格不响应我的触摸。我怎样才能解决这个问题？这是我在Cell 类中的 touchEnd 方法

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

    if (![self.unit.text isEqualToString:@"?"]) 
        [self.soundManager playSoundForUnit:self.unit];
    

【问题讨论】：

试试我的答案...它会工作

【参考方案1】：

你必须制作 CustomScrollView ：

.h:

@protocol CustomScrollViewDelegate <NSObject>

@optional
// optional becuase we always don't want to interact with ScrollView

- (void) customScrollViewTouchesEnded :(NSSet *)touches withEvent:(UIEvent *)event;

@end

@interface CustomScrollView : UIScrollView

@property (weak, nonatomic) id<CustomScrollViewDelegate> touchDelegate;
// delegate was giving error becuase name is already there in UIScrollView 

@end

.m :

#import "CustomScrollView.h"

@implementation CustomScrollView

- (id)initWithFrame:(CGRect)frame

    self = [super initWithFrame:frame];
    if (self) 
        // Initialization code
    
    return self;


- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event


    if (!self.dragging) 
        //NSLog(@"touchesEnded in custom scroll view");
        if (_touchDelegate != nil) 
            if ([_touchDelegate respondsToSelector:@selector(customScrollViewTouchesEnded:withEvent:)]) 
                [_touchDelegate customScrollViewTouchesEnded:touches withEvent:event];
            
        
    

    else 
        // it wouldn't be called becuase at the time of dragging touches responding stops.
        [super touchesEnded:touches withEvent:event];
    



@end