Swift-摇一摇

iOS中实现摇一摇有两种方式，一种是通过加速器实现，一种是通过系统提供的方法来实现，简单的令人发指.

UIResponder 类中提供了摇一摇开始，取消，结束的方法:

` override func motionBegan(_ motion: UIEventSubtype, with event: UIEvent?) {
 
 
}

override func motionCancelled(_ motion: UIEventSubtype, with event: UIEvent?) {
    
}

override func motionEnded(_ motion: UIEventSubtype, with event: UIEvent?) {
    
}`

viewDidLoad中可以设置控制器可以执行摇一摇，也可以不设置:

` override func viewDidLoad() {
 super.viewDidLoad()
 // Do any additional setup after loading the view, typically from a nib.
 
 
    UIApplication.shared.applicationSupportsShakeToEdit = true
    self.becomeFirstResponder()
}`

摇一摇执行的时候可以播放声音，结束的时候可以设置结束的事件，实现代码：

` override func motionBegan(_ motion: UIEventSubtype, with event: UIEvent?) {
 AudioServicesPlaySystemSound(kSystemSoundID_Vibrate)
 
 
    let path:String? = Bundle.main.path(forResource: "shake", ofType: "mp3")
    
    if path != nil {
        var soundID:SystemSoundID?
        AudioServicesCreateSystemSoundID(URL.init(fileURLWithPath: path!) as CFURL,&soundID!)
        //播放声音
        AudioServicesPlaySystemSound(soundID!)
    }

    print("FlyElephant--motionBegan")
}

override func motionCancelled(_ motion: UIEventSubtype, with event: UIEvent?) {
    print("FlyElephant---motionCancelled")
}

override func motionEnded(_ motion: UIEventSubtype, with event: UIEvent?) {
    print("FlyElephant--motionEnded")
    
    if event?.subtype == UIEventSubtype.motionShake {
         print("FlyElephant--motionEnded")
    }

}`