Swift 2.0 中的 motionEnded 方法

Question

我似乎无法使用 Swift 2.0/Xcode 7 的运动检测方法。我得到的错误指示：'Method does not override any method from its superclass'。我想使用内置的 UIEvent 方法检测各种动作......即摇动。这是我在 class

中的内容

    //this is used for detecting UIEvents i.e. 'Shake'
    override func canBecomeFirstResponder() -> Bool {
    return true
    }

..

    override func motionEnded(motion: UIEventSubtype, withEvent event: UIEvent)
    {
        if motion == .MotionShake && randomNumber == SHAKE
        {
            print("SHAKE RECEIVED")
            correctActionPerformed = true
        }
        else if motion == .MotionShake && randomNumber != SHAKE
        {
            print("WRONG ACTION")
            wrongActionPerformed = true
        }
         else
        {
            print("WRONG ACTION")
            wrongActionPerformed = true
        }
    }

这里遇到了同样的问题：

Answer 1

这里的问题是 Swift 2.0 中的参数已更新。 UIEvent 参数现在是 UIEvent?。为了避免将来出现这些问题，如果您知道要覆盖的函数，只需开始输入 "override func "，Xcode 的自动完成功能应该会为您提供所需的功能。

Answer 2

只是想在 Swift 3 iOS 10:

中添加相同的内容

override var canBecomeFirstResponder: Bool {
    return true
}

override func motionEnded(_ motion: UIEventSubtype, with event: UIEvent?) {
    if motion == .motionShake && randomNumber == SHAKE
    {
        debugPrint("SHAKE RECEIVED")
        correctActionPerformed = true
    }
    else if motion == .motionShake && randomNumber != SHAKE
    {
        debugPrint("WRONG ACTION")
        wrongActionPerformed = true
    }
    else
    {
        debugPrint("WRONG ACTION")
        wrongActionPerformed = true
    }
}

Swift 2.0 中的 motionEnded 方法

motionEnded method in Swift 2.0

superclass

uievent

swift

ios9

swift2