ios - 如何减少 collectionview 中两个单元格之间的垂直空间？

Question

如何减少collectionview中两个单元格之间的垂直间距？

Answer 1

在创建 Collection View 布局时添加这些行

layout.minimumInteritemSpacing = 0
layout.minimumLineSpacing = 0

 let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
        layout.sectionInset = UIEdgeInsets(top: 20, left: 0, bottom: 10, right: 0)
        layout.itemSize = CGSize(width: screenWidth/2, height: screenWidth/2)
        layout.minimumInteritemSpacing = 0
        layout.minimumLineSpacing = 0
        collectionView!.collectionViewLayout = layout

func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
    if indexPath.row == 0
    {
        return CGSize(width: screenWidth, height: screenWidth/2)
    }
    return CGSize(width: screenWidth/2, height: screenWidth/2);

}