CODEWITHSUNDEEP
iphoneiosobjective-ccocoa-touch
Svyatoslavik
Svyatoslavik

Reputation: 166

Unbalanced calls to begin/end appearance transitions for <TSActivityMapVC: 0x81b1000>

When I init UITabBarController where each tab include UINavigationController and each UINavigationController include UIViewController when in UIViewController I do something like

TSActivityDetailsVC * c = [[TSActivityDetailsVC alloc] initWithNibName:@"TSActivityDetailsVC" bundle:nil];
[self.navigationController pushViewController:c animated:YES];

I have animation, but when I press back button - I not have animation and get error

Log:

push view controller
Unbalanced calls to begin/end appearance transitions for <TSActivityMapVC: 0x81b1000>.
back btn pressed
Unbalanced calls to begin/end appearance transitions for <TSActivityDetailsVC: 0x81c85d0>.

init code:

-(UITabBarController *) createMainTabBarController{
UITabBarController * tabbarCntr = [[UITabBarController alloc] init];
[tabbarCntr setViewControllers:[NSArray arrayWithObjects:
                                [[UINavigationController alloc] initWithRootViewController:[[TSActivityMapVC alloc] init]],                                    
                                [[UIViewController alloc] init],
                                [[UIViewController alloc] init],
                                [[UIViewController alloc] init],
                                [[UIViewController alloc] init]
                                , nil]];
[tabbarCntr.tabBar setSelectionIndicatorImage:[UIImage imageNamed:@"selection_indicator"]];
[tabbarCntr.tabBar setBackgroundImage:[UIImage imageNamed:@"tabbar_background"]];    

return tabbarCntr; 
}

in TSActivityMapVC I perfom

TSActivityDetailsVC * c = [[TSActivityDetailsVC alloc] initWithNibName:@"TSActivityDetailsVC" bundle:nil]; 
[self.navigationController pushViewController:c animated:YES];

surprisingly that when I go to another tab and return - after it - all works fine without errors

Upvotes: 3

Views: 2451

Answers (2)

Kai Burghardt
Kai Burghardt

Reputation: 1503

I got the solution! I subclasses the UITabBarController and forgot to call the super of viewWillAppear. So the transition animation of the UITabBarController not finished.

This caused the the "Unbalanced calls to begin/end appearance"!

Upvotes: 10

Mark Kryzhanouski
Mark Kryzhanouski

Reputation: 7241

Finally I've reproduced your error. It seems that you are forgotten to call super in both methods.

-(void)beginAppearanceTransition:(BOOL)isAppearing animated:(BOOL)animated{
    [super beginAppearanceTransition:isAppearing animated:animated];
    NSLog(@"**************begin app tr");
}

-(void)endAppearanceTransition{
    [super endAppearanceTransition];
    NSLog(@"**************end app tr");
}

Hope your issue in this.

Upvotes: 1

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