CODEWITHSUNDEEP
iosobjective-cuinavigationcontrollerpushviewcontroller
Vivek Shah
Vivek Shah

Reputation: 420

Issue while remove viewController from navigation stack

I am making demo in which I have to remove some of viewControllers from the NavigationController, and for that I have implemented below code but it give me issue.

I have pushed VC1,VC2,VC3 and now I want to push VC4 and remove VC2...

ViewController4 *VC4=[[ViewController4 alloc]initWithNibName:@"ViewController4" bundle:nil];
[self.navigationController pushViewController:VC4 animated:YES];

NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:[[self navigationController] viewControllers]];

for(UIViewController *objVC in viewControllers)
{
    if([objVC isKindOfClass:[ViewController2 class]])
    {
        [viewControllers removeObjectIdenticalTo:objVC];
    }
}
self.navigationController.viewControllers =viewControllers ;

This code works fine with iOS8 but in iOS7 with VC2 also VC3 removes automatically when I press the back button in VC4. Even if I put below code the controller automatically removes from stack.

ViewController4 *VC4=[[ViewController4 alloc]initWithNibName:@"ViewController4" bundle:nil];
[self.navigationController pushViewController:VC4 animated:YES];

NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:[[self navigationController] viewControllers]];

self.navigationController.viewControllers =viewControllers ;

Upvotes: 1

Views: 967

Answers (1)

Tanuj
Tanuj

Reputation: 531

Here is the fix, working fine in iOS7 and iOS8:

NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:[[self navigationController] viewControllers]];

    // Find the things to remove
        NSMutableArray *toDelete = [NSMutableArray array];

    for(UIViewController *objVC in viewControllers)
    {
        if([objVC isKindOfClass:[ViewController2 class]])
        {
            [toDelete addObject:objVC];
        }
    }
    [viewControllers removeObjectsInArray:toDelete];
    self.navigationController.viewControllers =viewControllers ;

ViewController4 *VC4=[[ViewController4 alloc]initWithNibName:@"ViewController4" bundle:nil];
[self.navigationController pushViewController:VC4 animated:YES];

Upvotes: 2

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