[英]Custom layout UICollectionView swift
I am trying to achieve a custom layout like this one : 我正在尝试实现这样的自定义布局:
I am trying to implement it via a UICollectionView. 我试图通过UICollectionView实现它。 First I use this code to have the desired size : 首先,我使用此代码来获得所需的大小:
func collectionView(collectionView: UICollectionView,
layout collectionViewLayout: UICollectionViewLayout,
sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize{
return CGSizeMake((collectionView.frame.size.width / 2) - 2 , (collectionView.frame.size.height / 3) - 2)
}
It's working fine. 一切正常。
The problem is that my picture is not properly centered. 问题是我的图片没有正确居中。 I did it this way : 我是这样做的:
Let me explain : 让我解释 :
One constrain to say that the height of the image is 70% of the cell height 可以说图像的高度是像元高度的70%
And the result is very not the one expected : 结果非常不理想:
i did it using custom layout. 我做到了使用自定义布局。
let collLayout:UICollectionViewFlowLayout = layout as! UICollectionViewFlowLayout
collLayout.scrollDirection = .Vertical
collLayout.minimumInteritemSpacing = 10
let width = (frame.size.width - 3*collLayout.minimumInteritemSpacing)*0.5
collLayout.itemSize = CGSizeMake(width, width)
collLayout.sectionInset = UIEdgeInsetsMake(0, 10, 0, 10)
And then initialize your collection view with this custom layout. 然后使用此自定义布局初始化您的集合视图。
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