如何为通知对象设置'UIDevice.currentDevice（）'？

Question

当我添加设备方向更改通知时，如下所示：

NSNotificationCenter.defaultCenter().addObserver(self,
        selector: Selector(layoutPages),
        name: UIDeviceOrientationDidChangeNotification as String!,
        object: UIDevice.currentDevice())

我收到错误＆＃39; UIDevice与anyobject＆＃39;不完全相同，那么如何解决？

Answer 1

你的第二个参数有问题，它应该是一个字符串。此外，将UIDevice向上转换为AnyObject将有所帮助：

NSNotificationCenter.defaultCenter().addObserver(self,
    selector: Selector("layoutPages"),
        name: UIDeviceOrientationDidChangeNotification as NSString!,
      object: UIDevice.currentDevice() as AnyObject)