如何判断在touchesBegan中哪个对象被触摸了？

发布于 2024-08-29 05:42:23 字数 721 浏览 7 评论 0原文

我知道这是一个非常常见的问题，但每个网站上的所有答案都不起作用！如果你还是不明白我的意思，那么也许这行代码会帮助你理解。


- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [[event allTouches] anyObject];
    CGPoint location = [touch locationInView:self.view];
    if (touch.view == nextbutton)
        [self performSelector:@selector(next)];
    if (touch.view == prevbutton)
        [self performSelector:@selector(previous)];
    if (touch.view == moreoptionsbutton)
        [self performSelector:@selector(moresettings)];
}

当您触摸 nextbutton、prevbutton 和 more optionsbutton（顺便说一下，这些是 UIImageViews）时，它不会执行任何操作。我也尝试过使用 isEqual: 而不是 ==，但这也没有成功。有什么建议吗？

原文

I know that this is a very commonly asked question, but all of the answers on every website don't work! If you still don't know what I mean, then maybe this line of code will help you understand.


- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [[event allTouches] anyObject];
    CGPoint location = [touch locationInView:self.view];
    if (touch.view == nextbutton)
        [self performSelector:@selector(next)];
    if (touch.view == prevbutton)
        [self performSelector:@selector(previous)];
    if (touch.view == moreoptionsbutton)
        [self performSelector:@selector(moresettings)];
}

It doesn't do anything when you touch nextbutton, prevbutton, and more optionsbutton, which are UIImageViews by the way. I have also tried using isEqual: instead of ==, but that hasn't worked out either. Any suggestions?

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依靠 2024-09-05 05:42:23

您必须为所有 UIImageView 设置 userinteractionEnabled = YES，否则它们将不会收到触摸事件。还要更改行：

 UITouch *touch = [[event allTouches] anyObject];

至

 UITouch *touch = [touches anyObject];

You have to set userinteractionEnabled = YES for all your UIImageViews otherwise they will not receive touch events. Also change the line:

 UITouch *touch = [[event allTouches] anyObject];

 UITouch *touch = [touches anyObject];

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撧情箌佬 2024-09-05 05:42:23

我创建了一个检查，以确保它是我希望在继续之前单击的视图。

if( [touch.view isKindOfClass:[Custom class]] ){
    CGPoint touchPoint = [touch locationInView:self.view];

    if( CGRectContainsPoint( self.customClassOne.frame, touchPoint )
       || CGRectContainsPoint( self.customClassTwo.frame, touchPoint ) ){
        [self touchOnCustomClass];
    }
}

I created a check to be sure its the view I expect to be clicked before going on.

if( [touch.view isKindOfClass:[Custom class]] ){
    CGPoint touchPoint = [touch locationInView:self.view];

    if( CGRectContainsPoint( self.customClassOne.frame, touchPoint )
       || CGRectContainsPoint( self.customClassTwo.frame, touchPoint ) ){
        [self touchOnCustomClass];
    }
}

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