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我想指定集合视图单元格项目之间的行数、列数以及空间,然后我希望我的单元格的宽度和高度应由 ios 确定。怎么做 ?请检查我的以下代码脚本。当我更改行数和列数时,有时我看不到单元格之间的相等空间。如何看到总是相等的空间,并且还想要行和列。

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

    let layout = collectionViewLayout as! UICollectionViewFlowLayout;


    layout.minimumInteritemSpacing = 0.6
    layout.minimumLineSpacing = 0.6

    let remainingInterSpace = collectionView.frame.width - (layout.minimumInteritemSpacing*(numberOfColumns-1))       
    let remainingLineSpace = collectionView.frame.height - (layout.minimumLineSpacing*(numberOfRows-1))


    let width = remainingInterSpace / numberOfColumns     
    let height = remainingLineSpace / numberOfRows


    return CGSize(width: width, height: height)

 } 
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