Whose view is not related to the window hierarchy problem

Question

I installed navController, which appears after clicking a button. However, if I click the button, I get the error: " Warning: Attempt to present <UINavigationController>: 0xab5d9d0 on <MyApp: 0xadaa320> whose view is not in the window hierarchy! "

Does anyone know how to solve this? I also tried something on Stackoverflow, but this is not my solution.

Here is my code to open the navigation controller:

I don’t know if anyone knows this photo gallery, but if you do not, here is a project.

My code (MyApp.m):

 #import MyApp.h ... //some stuff - (void)launchGalleryView { MWPhotoBrowser *browser = [[MWPhotoBrowser alloc] initWithDelegate:self]; // Set browser options. browser.wantsFullScreenLayout = YES; browser.displayActionButton = NO; UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:browser]; NSMutableArray *photos = [[NSMutableArray alloc] init]; MWPhoto *photo; photo = [MWPhoto photoWithFilePath:[[NSBundle mainBundle] pathForResource:@"callculator" ofType:@"jpg"]]; photo.caption = @"The calculator is soo beateful..."; [photos addObject:photo]; self.photos = photos; [self presentModalViewController:navController animated:NO]; } 

Thanks in advance.

Edit:

it is in the sources and in the compilation sources, but in the resources you can see that it is red (storyboard). Maybe this is due to this?

Second .h controller:

 @class MyApp; @interface Second : UIViewController <MWPhotoBrowserDelegate> { } @property (nonatomic, retain) MyApp* vC; @end 

Secnond.m controller:

 #import "Second.h" #import "MyApp.h" @interface Second () @end @implementation Second @synthesize vC; //some stuff in here //the action - (IBAction)dothis:(id)sender { NSLog(@"launch the navcontroller"); [self.vC launchGalleryView]; } 

MyApp.h:

 #import "Second.h" @interface myApp : UIViewController <MWPhotoBrowserDelegate> { } -(void)launchGalleryView; NSArray *_photos; 

NEW EDITING:

I found that I need to call the "launchGalleryView" method in viewDidAppear, but how can I do this without calling navcontroller every time the view loads? Does anyone know how to do this?

Answer 1

I checked your project .. could not figure out the correct problem.

but I tried to hack and it worked.

replace this line with

 [self presentModalViewController:navController animated:YES]; 

this is

 [[[[[UIApplication sharedApplication] delegate] window] rootViewController] presentModalViewController:navController animated:YES];