调用触摸手势事件时如何检查其父视图或子视图？

Posted 2023-02-27

【中文标题】调用触摸手势事件时如何检查其父视图或子视图？

【英文标题】：How can I check whether its parent view or subview when touch gesture event called?

【发布时间】：2016-10-01 05:37:04

【问题描述】：

我有两种看法。一种是包含子视图的透明视图。我只想在单击父视图时删除screenView。当我单击popUpView 时，我不想调用tapGesture。怎么查？

screenView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];
screenView.backgroundColor = [UIColor clearColor];
UITapGestureRecognizer * clearTable = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(clearTableViewAction:)];
[clearTable setNumberOfTapsRequired:1];
[screenView setUserInteractionEnabled:YES];
[screenView addGestureRecognizer:clearTable];
screenView.tag = 100;
[self.view addSubview:screenView];

self.popUpView = [[UIView alloc]init];
self.popUpView.frame = ...
self.popUpView.backgroundColor = WhiteColor;
self.popUpView.userInteractionEnabled = YES;
self.popUpView.tag = 200;
[screenView addSubview:self.popUpView];  

-(void)clearTableViewAction:(UITapGestureRecognizer*)sender 
    if(sender.view.tag == 100)
         [UIView animateWithDuration:0.2
                     animations:^screenView.alpha = 0.0;
                     completion:^(BOOL finished) [screenView removeFromSuperview];
         ];
    

【问题讨论】：

如果将 userInteractionEnabled 设为 NO。 TapGesture 仍然被调用。

【参考方案1】：

使用shouldReceiveTouch委托方法并检查：

喜欢，

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch 

    if ([touch.view.tag == 100) 
    
        return YES;
    
    else 
    
        return NO; 
    

现在，如果您点击popUpView，则不会调用clearTableViewAction 手势方法。