CODEWITHSUNDEEP
iosobjective-cuinavigationcontroller
Lavanya v gowda
Lavanya v gowda

Reputation: 57

How to navigate to UIViewController which is not present in navigationStack

I have three UIViewControllers. I am navigating to VC3 from VC1. I want to navigate to VC2 if I click on cancel or done button from VC3.

I have added the VC2 controller to navigation stack programmatically.

    DocListViewController *temp1 = [[DocListViewController alloc] initWithNibName:@"DocListViewController" bundle:nil];
    [self.navigationController addChildViewController: temp1];

    for (UIViewController *controllers in  self.navigationController.viewControllers) {

      if([controllers isKindOfClass: [DocListViewController class]]) {            

        DocListViewController *VC2ViewController = (DocListViewController*)controllers;
        [self.navigationController popToViewController:VC2ViewController animated:YES];            
      }
    }

Upvotes: 2

Views: 97

Answers (3)

Subhajit Halder
Subhajit Halder

Reputation: 1423

What you are doing wrong here is adding it as child view controller,addChildViewController as it as a child of the current view controller does not add it in the navigation stack.

enter image description here

You need to insert the controller in you navigation stack before doing popToViewcontroller.

VC2 *temp1 = [[VC2 alloc] initWithNibName:@"DocListViewController" bundle:nil];
NSMutableArray *vcArray = [NSMutableArray arrayWithArray:self.navigationController.viewControllers] ;
[vcArray insertObject:temp1 atIndex:1]; // ** This index is `1` assuming you only have 2 controllers and we are pushing it in the middle,
// if you have many vc in navigation stack and just want to insert a new vc just before your current vc go with this:
/*
[vcArray insertObject:temp1 atIndex:vcArray.count - 2];
*/

self.navigationController.viewControllers = vcArray;
/* --- ** This part is also not needed:
  for (UIViewController *controllers in  self.navigationController.viewControllers) {
    if([controllers isKindOfClass: [DocListViewController class]]) {                   
       [self.navigationController popToViewController: controllers animated:YES];            
    }
}
*/
[self.navigationController popViewControllerAnimated:true];

Also: you don't need VC2 *VC2ViewController = (VC2*)controllers; inside the if block as you only need a UIViewController type object for pop-ing.

I have just edited your code, get the project reference below

Edit: Adding GitHub link for better reference: PlayingWithNavigation

Upvotes: 1

Pratik Sodha
Pratik Sodha

Reputation: 3727

    UIViewController *vc2 = [[UIViewController alloc] init];
    UIViewController *vc3 = [[UIViewController alloc] init];

    [self.navigationController pushViewController:vc2 animated:NO];
    [self.navigationController pushViewController:vc3 animated:YES];

Try this.

Upvotes: 0

Vinu Jacob
Vinu Jacob

Reputation: 381

You can navigate to VC2 using pushviewContoller

NSString * storyboardName = @"Main";
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
VC2 * VC2View = [storyboard instantiateViewControllerWithIdentifier:@"VC2ID"]; // "VC2ID" is the storyboard Id of your view controller
[self.navigationController pushViewController:VC2View animated:YES];

Upvotes: 0

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