ios - 如何根据设备屏幕大小调整 Collection View 单元格的大小？

Question

我注意到单元格将始终遵循尺寸检查器中的定义。即使我已经应用了 UICollectionViewDelegateFlowLayout。

这就是它的样子。但我希望这些单元格看起来更像是在较小的 iPhone 屏幕上的样子。

Answer 1

根据 View 的帧大小实现sizeForItemAt方法

swift

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {

    let height = view.frame.size.height
    let width = view.frame.size.width
    // in case you you want the cell to be 40% of your controllers view
    return CGSize(width: width * 0.4, height: height * 0.4)
}

objective-c

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

   CGFloat height = self.view.frame.size.height;
   CGFloat width  = self.view.frame.size.width;
   // in case you you want the cell to be 40% of your controllers view
   return CGSizeMake(width * 0.4, height * 0.4);
 }