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    <p>Assuming you are expecting ONLY three cells, and using a header view for this collection view, you will need to perform the following steps:</p> <p>override UICollectionViewFlowLayout</p> <pre><code>@interface GSRightToLeftCollectionViewFlowLayout : UICollectionViewFlowLayout </code></pre> <p>(GS is for Groboot SmarTech :))</p> <p>the .m should look like this:</p> <pre><code>#import "GSRightToLeftCollectionViewFlowLayout.h" typedef enum { // enum for comfortibility. CellXPositionLeft = 1, CellXpositionRight = 2, CellXpositionCenter = 3, CellXPositionNone = 4 } CellXPosition; @interface GSRightToLeftCollectionViewFlowLayout () @property (nonatomic) BOOL cellFlag; @property (nonatomic) float cellLeftX; @property (nonatomic) float cellMiddleX; @property (nonatomic) float cellRightX; @end @implementation GSRightToLeftCollectionViewFlowLayout // when ever the bounds change, call layoutAttributesForElementsInRect: - (BOOL)shouldInvalidateLayoutForBoundsChange:(CGRect)newBounds { return YES; } - (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect { NSMutableArray *allItems = [[super layoutAttributesForElementsInRect:rect] mutableCopy]; for (UICollectionViewLayoutAttributes *attribute in allItems) { // when we get an item, calculate it's English writing position, // so that we can convert it to the Hebrew - Arabic position. if (!self.cellFlag) { [self calculateLocationsForCellsWithAttribute:attribute]; self.cellFlag = YES; } // if it's a header, do not change it's place. if (attribute.representedElementKind == UICollectionElementKindSectionHeader) { continue; } // check where the item should be placed. CellXPosition position = [self attributeForPosition:attribute]; switch (position) { case CellXPositionLeft: attribute.frame = CGRectMake(self.cellLeftX, attribute.frame.origin.y, attribute.frame.size.width, attribute.frame.size.height); break; case CellXpositionRight: attribute.frame = CGRectMake(self.cellRightX, attribute.frame.origin.y, attribute.frame.size.width, attribute.frame.size.height); break; case CellXpositionCenter: attribute.frame = CGRectMake(self.cellMiddleX, attribute.frame.origin.y, attribute.frame.size.width, attribute.frame.size.height); break; case CellXPositionNone: NSLog(@"warning"); break; } } return allItems; } - (CellXPosition)attributeForPosition:(UICollectionViewLayoutAttributes *)attribute { CellXPosition cellXposition = CellXPositionNone; // we will return an opposite answer if (attribute.indexPath.row % 3 == 0) { // if it's in the left side, move it to the right cellXposition = CellXpositionRight; } else if (attribute.indexPath.row % 3 == 1) { cellXposition = CellXpositionCenter; } else if (attribute.indexPath.row % 3) { // if it's in the right side, move it to the left cellXposition = CellXPositionLeft; } return cellXposition; } - (void)calculateLocationsForCellsWithAttribute:(UICollectionViewLayoutAttributes *)attribute { float cellWidth = self.itemSize.width; float minimumX = self.sectionInset.left; float maximumX = self.sectionInset.right; float displayWidth = self.collectionView.contentSize.width - minimumX - maximumX; // on iOS6, displayWidth will be 0 (don't know why), so insert an if (displayWidth == 0) and set manually the size. self.cellLeftX = minimumX; float space = (displayWidth - cellWidth * 3) / 2; self.cellMiddleX = self.cellRightX + cellWidth + space; self.cellRightX = self.cellMiddleX + cellWidth + space; } @end </code></pre> <p>In the Class which you display the CollectionView, you need to do this:</p> <p>if you are using storyboards: 1. change the collectionView layout to custom (in the attribute inspector) 2. set it's class to GSRightToLeftCollectionViewFlowLayout. 3. in ViewDidLoad (or whenever you perform initialization)</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; GSRightToLeftCollectionViewFlowLayout *layout = [[GSRightToLeftCollectionViewFlowLayout alloc] init]; layout.itemSize = CGSizeMake(98, 138); // set the item size. layout.minimumLineSpacing = 1; // other layout properties. layout.minimumInteritemSpacing = 1; // other layout properties. layout.headerReferenceSize = CGSizeMake(50, 18); layout.sectionInset = UIEdgeInsetsMake(1.0f, 0.0f, 1.0f, 0.0f); layout.scrollDirection = UICollectionViewScrollDirectionVertical; // in case you use headers / footers. this is also where you would register a Cell if you don't use storyboards. [self.collectionView registerClass:[GSReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"HeaderView"]; self.collectionView.collectionViewLayout = layout; } </code></pre>
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    1. COIf i have to use this code for infinite number of cells that too horizontal what changes i have to do in the code..
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    2. COcan you be more specific @Leena? does the collectionView scrolls horizontally or vertically? the **code** doesn't limit the number of cells / items, it only changes the attributes of an item. do you mean you have an infinite number of items in one row? could you upload a visual representation of the collection view you want to create?
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    3. COlet it be i applied alternate solution for layout thanks for the reply.
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