CODEWITHSUNDEEP
iosuiviewcontrollerunwind-segue
noobsmcgoobs
noobsmcgoobs

Reputation: 2746

Unwind Segue iOS goes back 1 too many VC's

I have a 3 viewcontroller navigation where A presents modal controller B, which presents modal controller C all via segues. C has an unwind segue back to B. It also has an unwind back to A. When I perform action for C to unwind to B, it unwinds but then pops B and goes back to A. This is not what I want, I want it in this case to stay on B. Below are the segues VC C uses.

unwind segues from VC C

unwindCancel is for when user clicks on a collectionViewCell and goes back to VC B. prepareForUnwind is just a standard "cancel" button to VC A.

Below is code for didSelectItem to call the unwind in VC C. Below that is prepareForSegue in VC C. 

-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
[self performSegueWithIdentifier:@"unwindCancel" sender:self];
}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    if ([segue.identifier isEqualToString:@"unwindCancel"]) {
        GalleryDetailViewController *detailVC = segue.destinationViewController;
        detailVC.colletionCount = self.indexPathToPass;
    }
}

VC B unwind in .m file

-(IBAction)unwindCancel:(UIStoryboardSegue *)segue{

    [self.collectionView scrollToItemAtIndexPath:self.colletionCount atScrollPosition:UICollectionViewScrollPositionLeft animated:YES];
}

VC A unwind in .m file

-(IBAction)prepareForUnwind:(UIStoryboardSegue *)segue {
}

Upvotes: 11

Views: 324

Answers (2)

beyowulf
beyowulf

Reputation: 15331

When going from C to B, don't use an unwind segue just have C call dismissViewController. If you're committed to using unwind segues, look here specifically section entitle How an Unwind Segue Determines its Destination View Controller

Upvotes: 3

wj2061
wj2061

Reputation: 6885

I guess you confused an unwind-segue's identifier with unwind-segue's Action method.

If you build an unwind-segue with "prepareForUnwind" action, and then you change this unwind-segue's identifier to "unwindCancel".The problem would appear.

Just make sure the unwind-segue's identifier matches it's action method.

Upvotes: 2

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