ios - 从 UITapGestureRecognizer 中排除 subview

Question

我有一个 subview 和一个父 View 。 super View 附加了一个 UITapGestureRecognizer。

UIView *superview = [[UIView alloc] initWithFrame:CGRectMake:(0, 0, 320, 480);
UIView *subview = [[UIView alloc] initWithFrame:CGRectMake:(100, 100, 100, 100);
UIPanGestureRecognizer *recognizer = [[UIPanGestureRecognizer alloc] initWithTarget: self action: @selector(handleTap);
superview.userInteractionEnabled = YES;
subview.userInteractionEnabled = NO;
[superview addGestureRecognizer:recognizer];
[self addSubview:superview];
[superview addSubview:subview];

识别器也在 subview 中触发，有没有办法从 subview 中排除识别器？

我知道这个问题以前有人问过，但我没有找到好的答案。

Answer 1

您可以使用手势识别器委托(delegate)来限制它可以识别触摸的区域，类似于此示例:

recognizer.delegate = self;
...

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
    CGPoint touchPoint = [touch locationInView:superview];
    return !CGRectContainsPoint(subview.frame, touchPoint);
}

请注意，您需要保留对父 View 和 subview 的引用(使它们成为实例变量？)以便能够在委托(delegate)方法中使用它们