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iOS Displaying API Data with Collection Views in Objective-C Adding our DetailView, Gestures, and More Adding a Gesture Recognizer for Taps

David Lin
David Lin
35,864 Points
Posted by David Lin
David Lin
35,864 Points

Unnecessary call to performSegueWithIdentifier

In the CollectionViewController, the "showDetail" segue is already hooked up to show modally in the storyboard, so the call to performSegueWithIdentifier in didSelectItemAtIndexPath is redundant. By having this unnecessary call, prepareForSegue is needlessly called twice.

-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
// UNNECESSARY CALL, WHICH CAUSES prepareForSegue TO BE NEEDLESSLY CALLED TWICE
    [self performSegueWithIdentifier:@"showDetail" sender:self];
}

NOTE: In the next video, the existing segue is deleted and replaced by one connecting the collection view controller to the detailed view controller to get rid of a warning/error in the console. Then the above call becomes necessary to actually perform the segue when the user selects an item.