uicollectionview加载得很厉害 [英] uicollectionview Loads wierdly

问题描述

我使用自定义集合cell.set创建了一个集合视图，其中flowlayout为

I created a collection view with custom collection cell.set with flowlayout as

UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
[flowLayout setItemSize:CGSizeMake(250, 480)];
[flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
[self.templateCollectionView setCollectionViewLayout:flowLayout];

我将其设置为水平，但仍然在图中放错了单元格，请参阅 att mmp 放错位置&如果我们滚动并加载它，它将返回到正确的位置。任何人都可以提出这方面的错误吗？

I set it horizontal but still a cell is misplaced in figure see att mmp misplaced & it will back in its correct position if we scroll and load it back. Can anyone suggest whats wrong in this ?

推荐答案

有一个解决方法这个答案对我有用。下面是我用于水平滚动编辑的修复程序。基本上只是过滤掉下面提供坏帧的属性项。

There is a work around on this answer that works for me. Below is the fix I used edited for horizontal scrolling. Basically just filtering out the attributes item that is providing the bad frame down below.

- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect {
     NSArray *attributes = [super layoutAttributesForElementsInRect:rect];
     NSMutableArray *newAttributes = [NSMutableArray arrayWithCapacity:attributes.count];
     for (UICollectionViewLayoutAttributes *attribute in attributes) {
          if (attribute.frame.origin.y + attribute.frame.size.height <=    self.collectionViewContentSize.height) {
               [newAttributes addObject:attribute];
          }
     }
     return newAttributes;
}

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