How to get class object index in NSMutableArray in Xcode?

Question

Tarun Kumar · Accepted Answer

To get the index of object from the mutable array. For that- first of all import the FirstViewController (where you create ImageCollection class and array) in the SecondViewController and under the @interface create a property of NSIndexPath. like this:

@interface SecondViewController:UIViewController
@property NSIndexPath *indexPathOfImage;
...
@end

Now, go to the FirstViewController's implementation file import the SecondViewController. now, under the didSelectItemAtIndexPath: method of CollectionView create a reference of second view controller using storyboard like this:

SecondViewController *secondController = [self.storyborad instantiateViewControllerWithIdentifier:@"SecondViewController"];

now, when ever any collection view cell will be clicked, collection view method didSelectItemAtIndexPath: will be called which has the indexPath. Now we will assign it in the second view controller property indexPathOfImage, like this:

-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath*)indexPath
{
  ...
  SecondViewController *secondController = [self.storyborad instantiateViewControllerWithIdentifier:@"SecondViewController"];
  secondController.indexPathOfImage = indexPath;
  ...
}

Now, we can use it in the second view controller to get the index from imgArray, like this:

SecondViewController *secondViewController * [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
ImageCollection *imgCollection = [secondViewController.imgArray objectAtIndex:_indexPathOfImage];

that's it. I hope it will be helpful for you.

forum

How to get class object index in NSMutableArray in Xcode?

Anonymous User

Can you answer this question?

1 Answers

Liked By