刷新CollectionView 报错the item height must be less that the height of the UICollectionView minus the s

数据请求到了之后 刷新CollectionView 出现下面的错误。

the behavior of the UICollectionViewFlowLayout is not defined because:

2015-03-16 10:56:45.898 XXXXX [664:60b] the item height must be less that the height of the UICollectionView minus the section insets top and bottom values.

有可能是数据在插入之前，页面还没有加载完，导致的错误。

网上找了好久，只要假如一句话就解决问题了：

 self.automaticallyAdjustsScrollViewInsets = NO;