swift - 方法不会覆盖其父类(super class)中的任何方法

Question

当我遇到这个错误时，我正在尝试创建一个新的覆盖函数:方法不会覆盖它的父类(super class)中的任何方法

我已经尝试删除覆盖部分，但这只会给我另一个错误。

override func touchesBegan(touches: NSSet!, withEvent event: UIEvent!) {

    let touch : UITouch! = touches.anyObject() as! UITouch

    location = touch.locationInView(self.view)

    person.center = location
}

override func touchesMoved(touches: NSSet!, withEvent event: UIEvent!) {

    let touch : UITouch! = touches.anyObject() as! UITouch

    location = touch.locationInView(self.view)

    person.center = location

}

Answer 1

正确的方法签名是:

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

}

override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {

}