Question

我在尝试关联UIViewController时遇到问题，但我收到了最后的错误。

Attempt to present ViewController whose view is not in the window hierarchy

这是我的代码：

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    NSString *title = [alertView buttonTitleAtIndex:buttonIndex];

    if([title isEqualToString:@"Wokay"])
    {
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
        UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"Vibes"];
        [self.window.rootViewController presentViewController:vc animated:YES completion:nil];

    }
}

代码错误：

Warning: Attempt to present <ViewController: 0x110634bc0> on <Login: 0x10951e7f0> whose view is not in the window hierarchy!

Answer 1

您的UIViewController（Login）似乎不在窗口层次结构中。

您可能会在UIWindow中添加LoginViewController作为子视图。如果是，请将其设置为UIWindow的{{1}}

<强> AppDelegate.m

rootViewController

或

如果要在任何UIViewController（例如- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { //Other code parts [self.window setRootViewController:loginViewController]; return YES; }）中将LoginViewController的视图添加为subView，请改为显示

在 FirstViewController.m 中，

FirstViewController

代码不在窗口层次结构根视图中

1 个答案: