我正在使用AssetsPickerController中的SwiftVideos中选择多个Device gallery

问题:当我选择多个Videos或有时选择单个video时,有时由于App为空,我的Video Asset崩溃了。在100次测试中,这种情况发生5到10次。

码:

@IBAction func openAssetsAction(_ sender: UIButton) {
        let rootListAssets = AssetsPickerController()
        rootListAssets.didSelectAssets = {(assets: Array<PHAsset?>) -> () in

            for i in 0..<assets.count {

                let myPHAsset = assets[i]

                let options = PHVideoRequestOptions()
                options.deliveryMode = .highQualityFormat
                options.isNetworkAccessAllowed = true

                options.progressHandler = {  (progress, error, stop, info) in
                    print("progress: \(progress)")
                }

                PHImageManager.default().requestAVAsset(forVideo: myPHAsset!, options: options, resultHandler: { (asset, audioMix, info) in
                    if let urlAsset = asset as? AVURLAsset {
                        let localVideoUrl = urlAsset.url
                        print(localVideoUrl)
                    }
                })
            }
        }

        let navigationController = UINavigationController(rootViewController: rootListAssets)
        present(navigationController, animated: true, completion: nil)
    }


我尽力在StackOverFlow中找到类似的问题,并得到了一些建议,他们建议使用isNetworkAccessAllowed,但是在设置isNetworkAccessAllowed之后,仍然会得到nil Asset

最佳答案

首先,您不应在此处forVideo: myPHAsset!强制拆开资产

guard
  let myPHAsset = assets[i]
else {
  return
}


然后尝试将deliveryMode设置为自动:

options.deliveryMode = .automatic


编辑:

要强制下载资产,我们需要指定版本:

options.version = .original

关于ios - 如何用AssetsPickerController iOS中的PHImageManager解决空 Assets 问题?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/55488998/

10-14 21:24
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