如何獲取 UIView 中手指敲擊的坐標？

Question

如何獲取 UIView 中手指敲擊的坐標？ （我寧願不使用一大堆按鈕）

謝謝

Answer 1

有兩種方法可以做到這一點。 如果您已經擁有正在使用的 UIView 的子類，則可以覆蓋該子類的-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
}

但是，如果您還沒有繼承 UIView，並且視圖由視圖 controller 或其他任何東西擁有，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

Swift 3 個回答

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


func tapAction(_ sender: UITapGestureRecognizer) {

      let point = sender.location(in: yourView)


}

Answer 3

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

Answer 4

我假設您的意思是識別手勢（和觸摸）。 開始尋找如此廣泛的問題的最佳起點是 Apple 的示例代碼Touches 。 它遍歷了大量的信息。

Answer 5

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

你需要做這樣的事情。 touchesBegan:withEvent:是UIResponder的一個方法， UIView和UIViewController都派生自該方法。 如果你用谷歌搜索這個方法，那么你會發現幾個教程。 Apple 提供的MoveMe示例是一個不錯的示例。

Answer 6

Swift 5.6：

您可以在 UIResponder 中覆蓋以下內容（UIView 和 UIViewController 都繼承自）：

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)")
    }
}

或者在您的手勢識別器處理程序中：

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

}