Objective c 查找在使用UITapGestureRecognizer时点击的子视图

我如何知道在使用UIgestureRecognitors时在哪个子视图上发生了事件

根据文件：

手势识别器在屏幕上运行 按特定视图进行测试 以及该视图的所有子视图

就我所见，“视图”属性是

手势识别器显示的视图 附属于

---

这将是父视图。

这将在事件位置找到最内部的子视图。（请注意，如果该子视图具有任何交互式内部私有子视图，则此代码也会找到这些子视图。）

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，我有了一个更好的选择

[发件人视图]

这样使用它：

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;
}

---

杰出的非常感谢-这真的帮助了我！令人惊叹的！这将有助于解决更多的问题：）只想补充一点，

hitTest:withEvent:

将尽可能深入儿童树。如果有任何子视图或子视图的子视图要忽略，您可以在这些视图上设置

userInteractionEnabled=NO

。如果我们只想下一级呢？@JohnD。迭代查找

.superview

直到到达原始

视图

-[UIgestureRecognitizer视图]返回它附加到的视图（根据规范）；OP对该视图的子视图感兴趣。

-(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;
}