iPhone：如何找出触摸的对象

Question

在我的UIViewController上，我有不同的UIViews，其中一些是我的自定义UIViews。如何知道哪个UIView被触及，我的习惯是不是？

Answer 1

您可以为每个视图设置标记。

view1.tag = y;
UITapGestureRecognizer *tapGesture = 
    [[UITapGestureRecognizer alloc] initWithTarget:self 
                                            action:@selector(singleTapGestureCaptured:)];
tapGesture.numberOfTapsRequired = 1;
[view1 addGestureRecognizer:tapGesture];

并在singleTapGestureCaptured方法中：

- (void)singleTapGestureCaptured:(UITapGestureRecognizer *)gesture
{ 
    [[gesture view] tag];
    NSLog(@"tap captured for view :%d", [[gesture view] tag]);
}

Answer 2

您可以创建两个UIGestureRecognizers，然后您必须将手势识别器与您的观点相关联：

UITapGestureRecognizer * recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
[view addGestureRecognizer:recognizer];

UITapGestureRecognizer * recognizerCustom = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapCustom:)];
[customView addGestureRecognizer:recognizer];

通过这种方式，您知道在调用handleTap：方法时，您的普通视图被触及，当您的handleTapCustom：被调用时，您的自定义视图被调用。