在使用UICollectionViewFlowLayout自定义Item时，打印报出以下警告：

2017-06-01 15:59:20.965 EasyFlowerFind[2247:746359] Logging only once for UICollectionViewFlowLayout cache mismatched frame2017-06-01 15:59:20.966 EasyFlowerFind[2247:746359] UICollectionViewFlowLayout has cached frame mismatch for index path{length = 2, path = 0 - 1} - cached value: {{139.96000000000001, 0}, {62.840000000000003, 24}}; expected value: {{190, 0}, {62.840000000000003, 24}}

2017-06-01 15:59:20.966 EasyFlowerFind[2247:746359] This is likely occurring because the flow layout subclass EFTagsCollectionLayout is modifying attributes returned by UICollectionViewFlowLayout without copying them

查了很多资料，给出的解决办法都是在：

- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect；

这个方法里面要对NSArray的UICollectionViewLayoutAttributes进行copy操作。

NSArray * array =[super layoutAttributesForElementsInRect:rect]；

改成：

NSArray * array = [[NSArray alloc]initWithArray:[super layoutAttributesForElementsInRect:rect] copyItems:YES]；

试过这个方法后还是不行，希望有看到的能解决的给说下。