第三方record

OC

• 分类切换滚动视图
  https://github.com/pujiaxin33/JXCategoryView

• 自定义按钮，图片可在上、左、下、右，可调整图文间距
  SPButton - blog
  ACEdgeInsetsBtn - blog

• 遮罩引导
  //1个遮罩/次
  https://github.com/skx926/KSGuideController
  //N个遮罩/次
  https://github.com/zhusongyu/ZSYMaskView

• popover
  https://github.com/WellsYC/YCPopover

Swift

• 瀑布流 CHTCollectionViewWaterfallLayout
  https://github.com/chiahsien/CHTCollectionViewWaterfallLayout

override public func prepare() {
        super.prepare()

        . . .

        columnHeights = (0 ..< numberOfSections).map { section in
            let columnCount = self.columnCount(forSection: section)
            let sectionColumnHeights = (0 ..< columnCount).map { CGFloat($0) }
            return sectionColumnHeights
        }
        
        这里补充下
        //section出现0列就return
        for subColumnHeight in columnHeights {
            if subColumnHeight.count == 0 {
                return
            }
        }
        . . .

• 轮播图 FSPagerView
  https://github.com/WenchaoD/FSPagerView