如何从摄像机卷中获取视频并在UICollectionView中显示？

Question

我想在UICollectionView中加载所有相机滚动视频以及它们的持续时间(同样的方式，视频显示在相机卷中)。如何做到这一点？我查了this链接。但是他们像图像一样展示他们的视频。

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-照片库使用说明->我需要你的照片库把这个密钥添加到info.plist文件中

Answer 2

我建议使用苹果预装到Xcode中的照片框架。这个问题的答案已经在这里填写：

swift: How to load photos from photo library without using UIImagePickerController?

苹果公司创建的照片框架：

Framework/index.html

要添加视频，可以使用UIImagePickerCrollerSourceType：

picker.sourceType = UIImagePickerControllerSourceType.Camera