从我触摸屏的位置获取坐标 [英] Getting the coordinates from the location I touch the touchscreen

问题描述

我尝试从触摸屏的位置获取坐标，以在此时放置特定的UIImage。

I try to get the coordinates from the location where I hit the touchscreen to do put a specific UIImage at this point.

我该怎么做？

推荐答案

在 UIResponder 子类中，例如 UIView ：

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    let touch = touches.anyObject()! as UITouch
    let location = touch.locationInView(self)
}

此将在视图坐标中返回 CGPoint 。

This will return a CGPoint in view coordinates.

已使用Swift 3语法更新

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    let touch = touches.first!
    let location = touch.location(in: self)
}

已使用Swift 4语法更新

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch = touches.first!
    let location = touch.location(in: self.view)
}

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