如何使用 indexPathsForSelectedItems 在集合视图中获取所选项目 [英] How to get a selected item in collection view using indexPathsForSelectedItems

问题描述

我有一个照片集合视图，想将点击的照片传递给 detailViewControler.

I have a collectionView of photos and want to pass the photo who was cliked to a detailViewControler.

采集数据来自:

 var timeLineData:NSMutableArray = NSMutableArray ()

我想使用准备转场方法.

I would like to use the prepare for segue method.

我的问题是如何从被点击的单元格中获取好的 indexPath ?

My problem is how to get the good indexPath from the cell who was clicked ?

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue == "goToZoom" {
        let zoomVC : PhotoZoomViewController = segue.destinationViewController as PhotoZoomViewController
        let cell = sender as UserPostsCell

        let indexPath = self.collectionView!.indexPathForCell(cell)
        let userPost  = self.timeLineData.objectAtIndex(indexPath!.row) as PFObject
        zoomVC.post = userPost

    }
} 

推荐答案

prepareForSegue:sender: 中的 sender 参数将是单元格，如果您从单元格连接了 segue.在这种情况下，您可以从单元格中获取 indexPath，

The sender argument in prepareForSegue:sender: will be the cell if you connected the segue from the cell. In that case you can get the indexPath from the cell,

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "showZoomController" {
       let zoomVC = segue.destinationViewController as PhotoZoomViewController
       let cell = sender as UICollectionViewCell
       let indexPath = self.collectionView!.indexPathForCell(cell)
       let userPost  = self.timeLineData.objectAtIndex(indexPath.row) as PFObject
        zoomVC.post = userPost
    }
} 

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