如何根据设备屏幕尺寸调整集合视图单元格的大小？

我注意到单元格总是遵循尺寸检查器中的定义。即使我已经应用了 UICollectionViewDelegateFlowLayout。

看起来就是这样。但我希望这些单元格看起来更像更小的 iPhone 屏幕上的样子。

实施sizeForItemAt根据视图的帧大小的方法

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)
}

目标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);
 }