警告:尝试呈现其视图不在窗口层次结构中的 ViewController [英] Warning: attempt to present ViewController whose view is not in the window hierarchy

问题描述

在我的一个应用程序中，我从 application didReceiveLocalNotification 方法调用了一个 viewController.页面加载成功，但显示如下警告:

In one of my apps, I'm calling a viewController from the application didReceiveLocalNotification method. The page loads successfully, but it shows a warning as :

 Warning: Attempt to present <blankPageViewController: 0x1fda5190> on 
 <ViewController: 0x1fd85330> whose view is not in the window hierarchy!

我的代码如下:

 -(void) application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {

    blankPageViewController *myView = [[blankPageViewController alloc] 
               initWithNibName:@"blankPageViewController" bundle: nil];
    myView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    [self.viewController presentViewController:myView animated:NO completion:nil];  
}

推荐答案

最后我用下面的代码解决了这个问题.

Finally I solved that issue with the following code.

-(void) application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
       self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
       self.blankviewController = [[blankPageViewController alloc] initWithNibName:@"blankPageViewController" bundle:nil];
       self.window.rootViewController = self.blankviewController;
       [self.window makeKeyAndVisible];
}

这篇关于警告:尝试呈现其视图不在窗口层次结构中的 ViewController的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！