Swift - 从iOS PHAsset播放视频

Question

我想播放PHAsset从iOS相册中收集的视频.PHAsset视频nsurl(/sf/answers/2456990021/)对我自己的应用程序有效,可以说MyPlayer几分钟/块.当我将图像/视频复制到MyPlayers自己的沙箱中nsurl时,它始终有效.在我看来,

我需要将每个视频从临时PHAssetnsurl 复制到MyPlayers沙箱(appgroup/documents),然后才能使用沙箱相对nsurl播放视频.

如果是这种情况,所有其他玩家如何在飞行中播放长视频？如果有任何其他方式播放视频而不复制到应用程序沙箱,请让我知道方式.

Answer 1

经过几天的实验,我终于找到了解决方案,

导入文件

import AVKit

来自PHAsset

static func playVideo (view:UIViewController, asset:PHAsset) {

        guard (asset.mediaType == PHAssetMediaType.Video)

            else {
                print("Not a valid video media type")
                return
        }

        PHCachingImageManager().requestAVAssetForVideo(asset, options: nil, resultHandler: {(asset: AVAsset?, audioMix: AVAudioMix?, info: [NSObject : AnyObject]?) in

            let asset = asset as! AVURLAsset

            dispatch_async(dispatch_get_main_queue(), {

                let player = AVPlayer(URL: asset.URL)
                let playerViewController = AVPlayerViewController()
                playerViewController.player = player
                view.presentViewController(playerViewController, animated: true) {
                    playerViewController.player!.play()
                }
            })
        })
    }

来自AppLocalUrl

static func playVideo (view:UIViewController, appLocalUrl:NSURL) {

        dispatch_async(dispatch_get_main_queue(), {

            let player = AVPlayer(URL: appLocalUrl)
            let playerViewController = AVPlayerViewController()
            playerViewController.player = player
            view.presentViewController(playerViewController, animated: true) {
                playerViewController.player!.play()
            }
        })
    }

Answer 2

Swift 3中的@Sazzad Hissain Khan解决方案：

从PHAsset：

func playVideo (view: UIViewController, videoAsset: PHAsset) {

    guard (videoAsset.mediaType == .video) else {
        print("Not a valid video media type")
        return
    }

    PHCachingImageManager().requestAVAsset(forVideo: videoAsset, options: nil) { (asset, audioMix, args) in
        let asset = asset as! AVURLAsset

        DispatchQueue.main.async {
            let player = AVPlayer(url: asset.url)
            let playerViewController = AVPlayerViewController()
            playerViewController.player = player
            view.present(playerViewController, animated: true) {
                playerViewController.player!.play()
            }
        }
    }
}

从AppLocalUrl：

func playVideo (view: UIViewController, appLocalUrl: URL) {

    DispatchQueue.main.async {

        let player = AVPlayer(url: appLocalUrl)
        let playerViewController = AVPlayerViewController()
        playerViewController.player = player
        view.present(playerViewController, animated: true) {
            playerViewController.player!.play()
        }
    }
}

Answer 3

以下解决方案也适用于慢动作视频。

func playVideo(asset: PHAsset) {
    guard asset.mediaType == .video else {
        // Handle if the asset is not a video.
        return
    }

    let options = PHVideoRequestOptions()
    options.isNetworkAccessAllowed = true

    PHCachingImageManager().requestPlayerItem(forVideo: asset, options: options) { (playerItem, info) in
        DispatchQueue.main.async {
            let playerViewController = AVPlayerViewController()
            playerViewController.player = AVPlayer(playerItem: playerItem)
            present(playerViewController, animated: true) {
                playerViewController.player?.play()
            }
        }
    }
}