---恢复内容开始--- 怎样在UICollectionView中添加Header和footer 转载于http://my.oschina.net/zboy/blog/221525 摘要 来自-http://www.appcoda.com/supplementary-view-uicollectionview-flow-layout/ iOS UICollectionViewController 目录[-] Tweak the Margin of Your Content using Secti…