Swift-如何从相机胶卷中获取视频并将其显示在UICollectionView中？

Question

我想将所有相机胶卷视频及其持续时间加载到UICollectionView中（同样，视频显示在相机胶卷中）。怎么做？我检查了此链接。但是他们将视频显示为图片。

Answer 1

// get all videos from Photos library you need to import Photos framework
var photos: PHFetchResult<PHAsset>! // user photos array in collectionView for disaplying video thumnail
func getAssetFromPhoto() {
    let options = PHFetchOptions()
    options.sortDescriptors = [ NSSortDescriptor(key: "creationDate", ascending: true) ]
    options.predicate = NSPredicate(format: "mediaType = %d", PHAssetMediaType.video.rawValue)
    photos = PHAsset.fetchAssets(with: options)
    print(photos)
    photoCollectionView.reloadData() // reload your collectionView
}

// For displaying thumnait image and video dutation
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "photoCell", for: indexPath) as! PhotoCollectionViewCell
    let asset = photos!.object(at: indexPath.row)
    let width: CGFloat = 150
    let height: CGFloat = 150
    let size = CGSize(width:width, height:height)
    PHImageManager.default().requestImage(for: asset, targetSize: size, contentMode: PHImageContentMode.aspectFill, options: nil) { (image, userInfo) -> Void in

        self.photoImageView.image = image
        self.lblVideoTime.text = String(format: "%02d:%02d",Int((asset.duration / 60)),Int(asset.duration) % 60)

    }
    return cell
}

• 注意：隐私-图片库使用说明->我需要您的图片库将此密钥添加到info.plist文件中