mingmingsuper的专栏

今天在写一个功能的时候用到了Dictionary 的 grouping by 这个用法，代码先贴出来 import UIKit class AlignFlowLayout: UICollectionViewFlowLayout { required init(itemSize: CGSize = CGSize.zero, minimumInteritemSpacing: CGFloat = 0, minimumLineSpacing: CGFloat = 0, sectionInset:

import UIKit enum AlignType : NSInteger { case left = 0 case center = 1 case right = 2 } class EqualCellSpaceFlowLayout: UICollectionViewFlowLayout { //两个Cell之间的距离 private var horizontalSpace : CGFloat{ didSet{ self.