Swift：UICollectionViewCell didSelectItemAtIndexPath更改backgroundColor [英] Swift: UICollectionViewCell didSelectItemAtIndexPath Change backgroundColor

问题描述

我可以轻松地在CellForItemAtIndexPath方法中更改单元格的背景颜色

I'm easily able to change the background color of a cell in the CellForItemAtIndexPath method

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath     indexPath: NSIndexPath) -> UICollectionViewCell {
 cell.backgroundColor = UIColor.blackColor()
 }

但是，当我尝试更改DidSelectItemAtIndexPath中的颜色时，它不起作用。

However, when I attempt to change the color in the DidSelectItemAtIndexPath it does not work.

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath     indexPath: NSIndexPath) {
        let cell: ButtonCollectionCell = collectionView.dequeueReusableCellWithReuseIdentifier("ButtonCell", forIndexPath: indexPath) as! ButtonCollectionCell {
cell.backgroundColor = UIColor.blackColor()

}

另外我在某处读到使用didSelectItemAtIndexPath将无法正常工作，因为一旦集合视图开始滚动颜色将改变回来

Also I read somewhere that using didSelectItemAtIndexPath won't work because once the collection view begins scrolling the color will change back

什么是Swift中的修复？

What is the fix in Swift?

非常感谢你的帮助

推荐答案

你可以使用这个方法：

    func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath){

    var cell : UICollectionViewCell = collectionView.cellForItemAtIndexPath(indexPath)!
    cell.backgroundColor = UIColor.magentaColor()
}

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