ios - 运行时从任何地方的 didReceiveRemoteNotification presentViewController

Question

我正在尝试在收到远程通知时显示一个 UIViewController。

我的代码可以正常工作，但是当应用程序正在运行并且用户位于第一个屏幕/导航堆栈以外的任何其他位置时，UIViewController 不会显示。

有人可以帮忙吗？注意我想在呈现 UIViewController 时保留导航栏

当我尝试在其他地方显示“UIViewController”时收到此警告

警告:尝试呈现不在窗口层次结构中的 View !

提前致谢

这是我的 didReceiveRemoteNotification:

代码

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {

  var payload = userInfo
  let requestID = payload["requestID"] as! String


  let rootViewController = self.window!.rootViewController as! UINavigationController

  let storyboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
  let vc : RequestViewController = storyboard.instantiateViewControllerWithIdentifier("RequestViewController") as! RequestViewController
    vc.requestID = requestID

  let navigationController = UINavigationController(rootViewController: vc)

  rootViewController.presentViewController(navigationController, animated: true, completion: nil)

}

Answer 1

通过更改修复它:

rootViewController.presentViewController(navigationController, animated: true, completion: nil)

到:

rootViewController.visibleViewController!.presentViewController(navigationController, animated: false, completion: nil)