如何水平居中UICollectionView细胞？ [英] How to center horizontally UICollectionView Cells?

问题描述

我做了一些研究，但是我找不到任何关于如何在UICollectionView中水平居中单元格的代码示例。

I have done some research, but I couldn't find any code example on how to center cells in a UICollectionView horizontally.

而不是第一个单元格像这个 X00 ，我希望它像 0X0 。有没有办法实现这个目标？

instead of the first cell being like this X00, I want it to be like this 0X0. is there any way to accomplish this?

编辑：

可视化我想要的东西：

当CollectionView中只有一个元素时，我需要它看起来像版本B.当我有多个元素时，它应该像版本A但有更多元素。

I need it to look like version B when there is only one element in the CollectionView. When I got more than one element, then it should be like version A but with more elements.

目前，当我只有1个元素时它看起来像版本A，我想知道如何让它看起来像B。

At the moment it looks like Version A when I have only 1 element, and I wonder how I can make it look like B.

感谢您的帮助！

推荐答案

使用库不是一个好主意，如果你的目的只是这个，即中心对齐。

Its not a good idea to use a library, if your purpose is only this i.e to centre align.

你最好能做这个简单的计算在你的collectionViewLayout函数中。

Better you can do this simple calculation in your collectionViewLayout function.

func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets {

    let totalCellWidth = CellWidth * CellCount
    let totalSpacingWidth = CellSpacing * (CellCount - 1)

    let leftInset = (collectionViewWidth - CGFloat(totalCellWidth + totalSpacingWidth)) / 2
    let rightInset = leftInset

    return UIEdgeInsetsMake(0, leftInset, 0, rightInset)
}

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