ios - -[UIApplication _runWithMainScene :transitionContext:completion:] 中的断言失败

Question

这是我的实际错误:

Assertion failure in -[UIApplication _runWithMainScene:transitionContext:completion:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit/UIKit-3512.30.14/UIApplication.m:3315.

以前，即使在 IOS 8.4 中，代码也能正常工作。

使用 IOS 9 plus 执行以下代码时会显示此错误:

TabBarVC *newview =[[TabBarVC alloc]initWithNibName:@"TabBarVC" bundle:Nil];                            
self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:[[TabBarVC alloc] init] ];
[self.navController pushViewController:newview animated:YES]; 

确切地说，我正在尝试使用以前存储的用户 session 重新输入我的应用程序。

[SVProgressHUD showWithStatus:@"Authenticate..." maskType:SVProgressHUDMaskTypeClear];
NSString *success=[WEbServiceManager loginWithEmail2:val Type:@"Normal" SocialId:@"0" Devicetoken:returnAValue];

if ([success intValue]==1) {
    [SVProgressHUD dismiss];

    [[NSUserDefaults standardUserDefaults] setObject:[val stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] forKey:@"username"];
    [[NSUserDefaults standardUserDefaults] setObject:@"Normal" forKey:@"type"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    isGeneralLogin=@"Normal";
    [store setObject:@"TRUE" forKey:@"IsFirstTime"];

    strGlobalUserId=userInfo.userId;

    NSString *strSpecialChannel= [NSString stringWithFormat:@"Ce_%@",userInfo.userId];

    [PFPush subscribeToChannelInBackground:strSpecialChannel block:^(BOOL succeeded, NSError *error) {
        if (succeeded) {
            NSLog(@"Successfully subscribed to the broadcast channel n.");
        } else {
            NSLog(@"Failed to subscribe to the broadcast channel .");
        }
    }];


TabBarVC *newview =[[TabBarVC alloc]initWithNibName:@"TabBarVC" bundle:Nil];                            
self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:[[TabBarVC alloc] init] ];
[self.navController pushViewController:newview animated:YES];

下面是我第一次用来登录的代码，它很完美。

Answer 1

@Santanu 达斯。
一些事情发生了变化，你需要确保你的 UIWindow 在做任何事情之前已经“ Root ”了一个有效的 Controller ，所以它会是这样的:

rootViewController = [[RootViewController alloc]init];
UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:rootViewController];

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window setRootViewController:nav];
[self.window makeKeyAndVisible];

知道了？