ios – 当用户将手指拖入按钮区域时触发UIButton的方法？

我最近做了类似的事情.这是我在Swift中的代码.

(在此示例中,您将uIButton子类化,如：class FadingButton：UIButton)

...

// The user tapped the button and then moved the finger around.
override func touchesMoved(_ touches: Set<UITouch>,with event: UIEvent?) {
    super.touchesMoved(touches,with: event)

    // Get the point to which the finger moved
    if let point: CGPoint = touches.first?.LOCATIOn(in: self) {

        // If the finger was dragged outside of the button...
        if ((point.x < 0 || point.x > bounds.width) ||
            (point.y < 0 || point.y > bounds.height)) {

            // Do whatever you need here
        }
    }
}
...

我希望它对某人有帮助.