如何获取 UIView 中手指点击的坐标？

Question

如何获取 UIView 中手指点击的坐标？ （我不想使用一大堆按钮）

谢谢

Answer 1

有两种方法可以实现此目的。如果您已经拥有正在使用的 UIView 子类，则只需重写该子类上的 -touchesEnded:withEvent: 方法，如下所示：

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *aTouch = [touches anyObject];
    CGPoint point = [aTouch locationInView:self];
    // point.x and point.y have the coordinates of the touch
}

如果您尚未对 UIView 进行子类化，不过，并且视图由视图控制器或其他任何东西拥有，那么您可以使用 UITapGestureRecognizer，如下所示：

// when the view's initially set up (in viewDidLoad, for example)
UITapGestureRecognizer *rec = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapRecognized:)];
[someView addGestureRecognizer:rec];
[rec release];

// elsewhere
- (void)tapRecognized:(UITapGestureRecognizer *)recognizer
{
    if(recognizer.state == UIGestureRecognizerStateRecognized)
    {
        CGPoint point = [recognizer locationInView:recognizer.view];
        // again, point.x and point.y have the coordinates
    }
}

Answer 2

斯威夫特 3 答案

let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.tapAction(_:)))
yourView.addGestureRecognizer(tapGesture)


func tapAction(_ sender: UITapGestureRecognizer) {

      let point = sender.location(in: yourView)


}

Answer 3

我假设你的意思是识别手势（和触摸）。开始寻找如此广泛的问题的最佳位置是Apple的示例代码 触摸。它遍历了大量的信息。

Answer 4

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    CGPoint touchPoint = [touch locationInView:myView];
    NSLog("%lf %lf", touchPoint.x, touchPoint.y);
}

你需要做这样的事情。 touchesBegan:withEvent: 是 UIResponder 的一种方法，UIView 和 UIViewController 均派生自该方法。如果你用谷歌搜索这个方法，你会发现几个教程。 Apple 的 MoveMe 示例是一个很好的示例。

Answer 5

func handleFrontTap(gestureRecognizer: UITapGestureRecognizer) {
    print("tap working")
    if gestureRecognizer.state == UIGestureRecognizerState.Recognized
    { 
      `print(gestureRecognizer.locationInView(gestureRecognizer.view))`
    }
}

Answer 6

Swift 5.6：

您可以在 UIResponder（UIView 和 UIViewController 继承自）中重写以下内容：

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    if let touch = touches.first {
        let point = touch.location(in: someView)
        print("x = \(point.x), y = \(point.y)")
    }
}

或者在手势识别器处理程序中：

@objc func handleLongPress(gestureRecognizer: UILongPressGestureRecognizer) {
    let point = gestureRecognizer.location(in: someView)
    print("x = \(point.x), y = \(point.y)")

}