UICollectionView using sections leaves a gap between cells

Question

I\'m using a UICollectionView to show several sections of data. These sections have a fixed number of items. I want all the items to show in a continuous grid.

Right

Answer 1

Use like this

It will solve Gap problem

UICollectionViewFlowLayout *layout=[[UICollectionViewFlowLayout alloc] init];

layout.minimumInteritemSpacing = 0;
layout.minimumLineSpacing = 2;

Answer 2

To remove those gaps you need to create custom layout which will act as layout for your collection view. This class will child class for UICollectionViewFlowLayout.

Then you can override below two methods and can create your own custom layout as you want.

  - (NSArray*)layoutAttributesForElementsInRect:(CGRect)rect
  - (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)path

UICollectionViewLayoutAttributes is class which will deal with cell position, frame, Zindex etc

You can also use below properties.

 collectionView:layout:minimumInteritemSpacingForSectionAtIndex:
 collectionView:layout:minimumLineSpacingForSectionAtIndex: