查找在使用UITapGestureRecognizer时点击的子视图

这将在事件的位置找到最里面的子代视图。(请注意,如果该子视图有任何交互的内部私生子,则此代码也会找到这些子视图。)

UIView* view = gestureRecognizer.view;
CGPoint loc = [gestureRecognizer locationInView:view];
UIView* subview = [view hitTest:loc withEvent:nil];

在Swift 2中:

let view = gestureRecognizer.view
let loc = gestureRecognizer.locationInView(view)
let subview = view?.hitTest(loc, withEvent: nil) // note: it is a `UIView?`

在Swift 3中:

let view = gestureRecognizer.view
let loc = gestureRecognizer.location(in: view)
let subview = view?.hitTest(loc, with: nil) // note: it is a `UIView?`

对于未来的用户… 当世界不再使用obj-c时,我有了更好的选择…

[sender view]

使用方法如下:

UITapGestureRecognizer * objTapGesture = [self createTapGestureOnView:myTextField];

[objTapGesture addTarget:self action:@selector(displayPickerView:)];

//添加这些方法

-(void)displayPickerView:(UITapGestureRecognizer*)sender
{
    UITextField *textField = (UITextField*)[sender view];
    NSLog(@"tag=  %ld", (long)textField.tag);
}

-(UITapGestureRecognizer*)createTapGestureOnView:(UIView *)view
{
    view.userInteractionEnabled = YES;
    UITapGestureRecognizer * tapGesture = [[UITapGestureRecognizer alloc]init];
    tapGesture.numberOfTapsRequired = 1;
    tapGesture.numberOfTouchesRequired = 1;
    [view addGestureRecognizer:tapGesture];
    return tapGesture;
}