Question

我有一张图片需要在另一张图片的顶部拖动。当您触摸它时，touchesBegan仅在您触摸图像顶部或其正上方的图像时才会注册。触摸图像的中心或顶部以外的任何其他部分根本不起作用。我是否正确设置了它？

override func viewDidLoad() {
    super.viewDidLoad()
    imageView.image = selectedPhoto
    watermarkImageView.image = selectedWatermark
}

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    for touch in touches {
        let location = touch.locationInView(self.view)
        if watermarkImageView.frame.contains(location) {
            watermarkImageView.center = location
        } 
    } 
}

override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
    for touch in touches {
        let location = touch.locationInView(self.view)
        if watermarkImageView.frame.contains(location) {
            watermarkImageView.center = location
        } 
    }
}

Answer 1

两个图像视图都嵌套在另一个视图中。我不得不更改location来反映这一点。

let location = touch.locationInView(imageContainerView)

为什么没有接触开始正常工作？

1 个答案: