CODEWITHSUNDEEP
objective-cfile
Wookies'n'Cookies
Wookies'n'Cookies

Reputation: 57

Deleting a file from documents directory when going back in UINavigation

I'm trying to delete a file in my Documents directory when the user presses back in a view with UINavigation. When I run my code go back then go back to the view, I get the following error and the app crashes:

2014-07-28 18:19:42.446 App[13291:a0b] nested pop animation can result in corrupted navigation bar

2014-07-28 18:19:42.798 App[13291:a0b] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.

My Code

-(void) viewWillDisappear:(BOOL)animated {
    if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound) {
        // Navigation button was pressed. Do some stuff
        NSString *path = [[NSBundle mainBundle] pathForResource:_url ofType:@"plist"];
        NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:path];

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *temp = [documentsDirectory stringByAppendingPathComponent:[dict objectForKey:@"FolderName"]];
        [[NSFileManager defaultManager] removeItemAtPath: temp error:nil];

        [self.navigationController popViewControllerAnimated:NO];
    }
    [super viewWillDisappear:animated];
}

Upvotes: 0

Views: 31

Answers (1)

azsromej
azsromej

Reputation: 1629

If the back button has been pressed, the navigation controller is already in the process of popping the current view controller. Try it without the call to popViewControllerAnimated:

If you need to perform certain actions related to pushing/popping view controllers, you can also look into the UINavigationControllerDelegate methods.

Upvotes: 1

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