UICollectionView单元格动态高度

Question

I have created an UICollectionView cell and it's displaying perfectly, but my doubt is have given an constant size of cell in sizeForItemAtIndexPath . My issue is each and every cell is containing dynamic height, how can i calculate and give at sizeForItemAtIndexPath

Answer 1

You can implement the function like so:

- (CGSize)collectionView:(UICollectionView *)collectionView
                  layout:(UICollectionViewLayout *)collectionViewLayout
  sizeForItemAtIndexPath:(NSIndexPath *)indexPath
  {
       NSString* blogEntry = (NSString*)self.entries[indexPath.item];
       CGSize size = [blogEntry sizeWithAttributes:
                                @{NSFontAttributeName:font}];
       return HEADER_HEIGHT + size.height;
   }

Inside you want to calculate the size of the cell. One common scenario is a cell that has a header and a body of text (like a post in a blog). In this case you need to calculate the text using sizeWithAttributes: method and add the standard header size.