IOS详细瀑布流

/** 默认的列数 */ static const NSInteger XMGDefaultColumnCount = 3; /** 每一列之间的间距 */ static const CGFloat XMGDefaultColumnMargin = 10; /** 每一行之间的间距 */ static const CGFloat XMGDefaultRowMargin = 10; /** 边缘间距 */ static const UIEdgeInsets XMGDefaultEdgeInsets = {10, 10, 10, 10}; @interface XMGWaterflowLayou