swift - Fusuma Album View video 拇指交换

Question

我将 Fusuma 用于我的图像和视频库。我对滚动画廊 View (FSAlbumView.swift) 有疑问。当我滚动时，它会交换视频缩略图，或者代替视频缩略图出现图像缩略图，图像缩略图没有任何问题，问题仅在于视频缩略图。

这是我的代码。

 func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("FSAlbumViewCell", forIndexPath: indexPath) as! FSAlbumViewCell

    let currentTag = cell.tag + 1
    cell.tag = currentTag

    let asset = self.images[indexPath.item] as! PHAsset
    if(asset.mediaType == .Image){
        self.imageManager?.requestImageForAsset(asset,
                                                targetSize: cellSize,
                                                contentMode: .AspectFill,
                                                options: nil) {
                                                    result, info in

                                                    if cell.tag == currentTag {
                                                        cell.image = result
                                                    }

        }
    }else if(asset.mediaType == .Video){
        self.imageManager?.requestAVAssetForVideo(asset, options: nil, resultHandler: {(asset: AVAsset?, audioMix: AVAudioMix?, info: [NSObject : AnyObject]?) in
                //dispatch_async(dispatch_get_main_queue(), {

                    let asset = asset as? AVURLAsset
            if asset?.URL.absoluteString != nil{
            self.videoURLArray.append([indexPath.row:(asset?.URL.absoluteString)!])
            }
                    if cell.tag == currentTag {
                        cell.video = asset?.URL
                       // self.videoURLArray[indexPath.row] = (asset?.URL.absoluteString)!
                        print(asset?.URL)

                    }
                    //..var data = NSData(contentsOfURL: asset!.URL)

                //})
            })
    }
    return cell
}

Answer 1

我们也遇到了同样的问题。我们所做的是在下面给出。不知道这样对不对。

评论下面的语句。

let currentTag = cell.tag + 1  
cell.tag = currentTag

添加用以下代码片段替换 if-else block

self.imageManager?.requestImageForAsset(asset, targetSize: cellSize, contentMode: .AspectFill, options: nil){
                                                    result, info in


                                                    if(asset.mediaType == .Video){
                                                        self.imageManager?.requestAVAssetForVideo(asset, options: nil, resultHandler: {(asset: AVAsset?, audioMix: AVAudioMix?, info: [NSObject : AnyObject]?) in

                                                            let asset = asset as? AVURLAsset
                                                            if asset?.URL.absoluteString != nil{
                                                                self.videoURLArray.append([indexPath.row:(asset?.URL.absoluteString)!])
                                                            }
                                                        })
                                                    }
                                                    cell.image = result
 }