ios UICollection View 调整屏幕大小的单元格大小
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UICollection View Adjust Cell Size for Screen Size
提问by benjih555
Currently i have a collection view which takes up most of my screen at the 3.5 inch screen size.The collection view is 51 pixels from the top and 20 pixels from the bottom of the screen. I am using the cells with UIPageControlto create a paged layout, with one cell per page. When switching to the 4 inch size, using constraints i can get the collection view to expand into the new space (maintaining the 51 pixels from the top and 20 from bottom), but the cell size stays the same, so now there is a bunch of empty space at the top and bottom of the cell. I tried using constraints, but it appears you can't set them for cells. How do i expand the cell size bigger to fill the empty space on the iPhone 5?
目前我有一个集合视图，它在 3.5 英寸屏幕尺寸下占据了我的大部分屏幕。集合视图距屏幕顶部 51 像素，距屏幕底部 20 像素。我正在使用单元格UIPageControl创建分页布局，每页一个单元格。当切换到 4 英寸大小时，使用约束我可以让集合视图扩展到新空间（保持顶部的 51 个像素和底部的 20 个像素），但单元格大小保持不变，所以现在有一堆单元格顶部和底部的空白空间。我尝试使用约束，但似乎您无法为单元格设置它们。如何扩大单元格大小以填充 iPhone 5 上的空白空间？
The collection view code is just
集合视图代码只是
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
MyCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
return cell;
}
The layout is setup in IB I want to get the layout working first before I add more
布局是在 IB 中设置的 我想先让布局工作，然后再添加更多
回答by rdelmar
You can either use the UICollectionViewFlowLayoutmethod itemSizeproperty to set the UICollectionViewCellsize, or use the delegatemethod, collectionView:layout:sizeForItemAtIndexPath:if you need to dynamically set the sizes of the UICollectionViewCells.
您可以使用UICollectionViewFlowLayoutmethoditemSize属性来设置UICollectionViewCell大小，或者使用该delegate方法，collectionView:layout:sizeForItemAtIndexPath:如果您需要动态设置UICollectionViewCells.
回答by Waqas Haider Sheikh
CollectionView layout Delegate that will help you to resize your Cell as you need.
CollectionView layout Delegate that will help you to resize your Cell as you need.
- (CGSize)collectionView:(UICollectionView *)collectionView
layout:(UICollectionViewLayout*)collectionViewLayout
sizeForItemAtIndexPath:(NSIndexPath *)indexPath;
