iphone - HitTest :withEvent: Not Working

Question

我正在制作一个应用程序，其中有一个背景 View ，并且有六个 UIImageView 作为 subview 。我有一个 UITapGestureRecognizer 来查看何时点击其中一个 UIImageView 并且下面的 handleTap 方法是手势识别器调用的方法。但是，当我运行它时，hitTest:withEvent: 总是返回背景 View ，即使我点击其中一个 imageViews 也是如此。和调用hitTest的事件有关系吗？

谢谢

- (void) handleTap: (UITapGestureRecognizer *) sender
{
    if (sender.state == UIGestureRecognizerStateEnded)
    {
        CGPoint location = [sender locationInView: sender.view];
        UIView * viewHit = [sender.view hitTest:location withEvent:NULL];
        NSLog(@"%@", [viewHit class]);
        if (viewHit == sender.view) {}
        else if ([viewHit isKindOfClass:[UIImageView class]])
        {
            [self imageViewTapped: viewHit];
            NSLog(@"ImageViewTapped!");
        }
    }
}

Answer 1

默认情况下，UIImageView 配置为不注册用户交互。

来自 UIImageView 文档:

New image view objects are configured to disregard user events by default. If you want to handle events in a custom subclass of UIImageView, you must explicitly change the value of the userInteractionEnabled property to YES after initializing the object.

因此，在初始化 View 之后，您应该:

view.userInteractionEnabled = YES;

这将重新打开交互，您应该能够注册触摸事件。