swift - 在 iOS 中移动多个图像

Question

我在 View Controller 中有多个图像。我正在尝试实现触摸方法来拖动图像。当我尝试拖动单个 ImageView 时，所有 ImageView 都会被拖动。这是我正在使用的代码:

@IBOutlet weak var img1: UIImageView!
@IBOutlet weak var img2: UIImageView!
@IBOutlet weak var img3: UIImageView!
@IBOutlet weak var img4: UIImageView!

var location = CGPoint(x: 0 , y:0)

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    if let touch = touches.first{
        location = touch.locationInView(self.view)

        if touch.view == img1 {
            print("img1 tapped")
            img1.center = location
        }
        else if touch.view == img2 {
            print("img2 tapped")
            img2.center = location
        }
        else if touch.view == img3 {
            print("img3 tapped")
            img3.center = location
        }
    }

    super.touchesBegan(touches, withEvent: event)
}

override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
    if let touch = touches.first{
        location = touch.locationInView(self.view)

        if touch.view == img1 {
            print("img1 tapped")
            img1.center = location
        }
        else if touch.view == img2 {
            print("img2 tapped")
            img2.center = location
        }
        else if touch.view == img3 {
            print("img3 tapped")
            img3.center = location
        }
    }
}

Answer 1

您需要获取 UIimageView 数组，然后设置识别器。因此每个识别器都将在 NSUser Default 中设置。