ios - 快速获取 ScrollView 内触摸的位置(坐标)

Question

我正在 UIScrollView 中的 UIImageView 上工作，UIImageView 可以通过 UIScrollView 缩放，但我的目标是获取点的坐标，这样每当用户在缩放时触摸 UIImageView 时，点“粘”到UIImageView，然后在取消缩放时(因此当缩放比例为 1.0 时)，将保存坐标。

我能够获取图片，将其放入 ScrollView 的 ImageView 中，并使图片可缩放，但每当我触摸 scrollView 时，都不会显示任何坐标。

这是我的代码:

    override func viewDidLoad() {
    super.viewDidLoad()

    self.scrollview.minimumZoomScale = 0.5
    self.scrollview.maximumZoomScale = 6.0
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

@IBAction func ChooseExisting(sender: AnyObject) {

    let picker = UIImagePickerController()

    picker.delegate = self
    picker.sourceType = .PhotoLibrary

    presentViewController(picker, animated: true, completion: nil)


}

@IBAction func Camera(sender: AnyObject) {
    let picker = UIImagePickerController()

    picker.delegate = self
    picker.sourceType = .Camera

    presentViewController(picker, animated: true, completion: nil)



}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
    ChosenImage.image = info[UIImagePickerControllerOriginalImage] as? UIImage
    dismissViewControllerAnimated(true, completion: nil)
}
func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
    return self.ChosenImage
}
override func touchesEnded(touches: Set<NSObject>, withEvent event: (UIEvent!)) {
    if let touch = touches.first as? UITouch {
        let location = touch.locationInView(self.ChosenImage)

        println("\(location)")
    }
}

println 只返回 ScrollView 以外任何地方的触摸值

Answer 1

将 UIGestureRecognizer 添加到您的 UIImageView 并将 userInteractionEnabled 设置为 true。

let tapGestureRecognizer = UITapGestureRecognizer(target:self, action:Selector("imageTapped:"))
imgViewClickTest.addGestureRecognizer(tapGestureRecognizer)
imgViewClickTest.userInteractionEnabled = true

然后处理水龙头

func imageTapped(recognizer : UIGestureRecognizer) {
    let tappedPoint: CGPoint = recognizer.locationInView(self.view!)
    let x: CGFloat = tappedPoint.x
    let y: CGFloat = tappedPoint.y

    print(tappedPoint)
    print(x)
    print(y)
}