Swift, Fire segue upon Orientation 旋转

Question

我试图根据方向是横向还是纵向来触发 segue。这就是我正在使用的，但它给了我一个无法识别的选择器错误。谁能指出我正确的方向？

 viewDidLoad(){
    UIDevice.currentDevice().beginGeneratingDeviceOrientationNotifications()

    NSNotificationCenter.defaultCenter().addObserver(self, selector: "showScoreCard:", name: UIDeviceOrientationDidChangeNotification, object: nil)

}



func showScoreCard {
    let deviceOrientation = UIDevice.currentDevice().orientation

    if UIDeviceOrientationIsLandscape(deviceOrientation){
        self.performSegueWithIdentifier("scorecardSegue", sender: self)

 }

Answer 1

去掉 showScoreCard 字符串末尾的冒号，因为冒号表示该方法采用一个参数。