UICollectionView间距不等于

Question

我有一个垂直UICollectionView与标准宽度和可变高度单元格。我有一个间距的问题。对于一个小区的每个高度的细胞后的间距是不同的：

截图的UICollectionView

Answer 1

一种UICollectionView的具有delegate属性。您应该在某些课程中实施UICollectionViewDelegateFlowLayout，例如View Controller。

此方法负责间距：

// Space around the section. 
func collectionView(_ collectionView: UICollectionView, 
        layout collectionViewLayout: UICollectionViewLayout, 
        insetForSectionAt section: Int) -> UIEdgeInsets { 
    return UIEdgeInsets(top: 20, left: 20, bottom: 20, right: 20) 
} 

// In case of vertical layout this is a vertical space between horizontal rows inside of each section 
func collectionView(_ collectionView: UICollectionView, 
        layout collectionViewLayout: UICollectionViewLayout, 
        minimumLineSpacingForSectionAt section: Int) -> CGFloat { 
    return 20 
} 

// Horizontal space between items in row 
func collectionView(_ collectionView: UICollectionView, 
        layout collectionViewLayout: UICollectionViewLayout, 
        minimumInteritemSpacingForSectionAt section: Int) -> CGFloat { 
    return 20 
}