如何为单个UICollectionView使用两种类型的UICollectionViewCell？

Question

I'm looking to add another custom UICollectionVIewCell to my UICollectionView . So I would now have two custom cells in the same collectionView. All of the delegate methods I have put in are for the first collectionViewCell (collectionVIewCellA).

I've added collectionViewCellB to my storyboard, but am unsure of how to tell the viewController about this new custom cell and to configure it. Has anyone done this?

Thank you so much for your help.

Answer 1

You can do this by,

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
                  cellForItemAtIndexPath:(NSIndexPath *)indexPath {

     if (condition for cellA) {
          //dequeue cell with cell A identifier
          //configure cell
     } else {
          //dequeue cell with cell B identifier
          //configure cell
     }
}

assuming the collectionview cell A and B have different reuse identifiers configured in storyboard.

You can use the same logic in sizeForItemAtIndexPath delegate method to update height depends on cell

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath

Answer 2

you set condition in collectionView cellForItemAtIndexPath Delegate method like this way.

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    // your cell condition here
    if (self.isMainMenu) {
        MainCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:@"MainCell" forIndexPath:indexPath];
   if(cell!=nil){// cell nil condition
   }
// cell coding here

return cell;
    }
    else{
    // second custom cell code here
        ItemCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:@"ItemCell" forIndexPath:indexPath];
        // cell coding here
        return cell;
    }
}

increase cell height

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout
  sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
    if(first cell condition)
    {        
        return CGSizeMake((collectionView.frame.size.width/4)-5, (collectionView.frame.size.width/4)-5);// your required height
    }
    else{
         return CGSizeMake((collectionView.frame.size.width/4)-5, (collectionView.frame.size.width/4)-5);// your required height
    }

}