错误域 = NSCocoaErrorDomain 代码 = 257 无法打开文件“” - Firebase

Question

所以我通过自定义 UICollectionView 访问用户的视频和照片，我的问题是，当我尝试通过手机上传视频到 firebase 时，我收到此错误：

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2017-09-03 13:09:20.884509-0400 Project[5797:2021536] Cannot get file size: Error Domain=NSCocoaErrorDomain Code=257 "The file \xe2\x80\x9cIMG_3476.MP4\xe2\x80\x9d couldn\xe2\x80\x99t be opened because you don\xe2\x80\x99t have permission to view it." UserInfo={NSURL=file:///var/mobile/Media/DCIM/103APPLE/IMG_3476.MP4, NSFilePath=/var/mobile/Media/DCIM/103APPLE/IMG_3476.MP4, NSUnderlyingError=0x17064f450 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}}\n  /var/mobile/Media/DCIM/103APPLE/IMG_3476.MP4\n2017-09-03 13:09:21.261767-0400 Project[5797:2021536] Body file is unreachable: /var/mobile/Media/DCIM/103APPLE/IMG_3476.MP4\n  Error Domain=NSCocoaErrorDomain Code=257 "The file \xe2\x80\x9cIMG_3476.MP4\xe2\x80\x9d couldn\xe2\x80\x99t be opened because you don\xe2\x80\x99t have permission to view it." UserInfo={NSURL=file:///var/mobile/Media/DCIM/103APPLE/IMG_3476.MP4, NSFilePath=/var/mobile/Media/DCIM/103APPLE/IMG_3476.MP4, NSUnderlyingError=0x170651b20 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}}\n

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这是我加载文件的地方

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struct Media {\n    var image:UIImage?\n    var videoURL:NSURL?\n}\n\nvar mediaArray = [Media]()\n\nfunc grabPhotos(){\n    let imgManager = PHImageManager.default()\n\n    let requestOptions = PHImageRequestOptions()\n    requestOptions.isSynchronous = true\n    requestOptions.deliveryMode = .highQualityFormat\n\n    let fetchOptions = PHFetchOptions()\n    fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]\n    if let fetchResult : PHFetchResult = PHAsset.fetchAssets(with: .video, options: fetchOptions) {\n\n\n        if fetchResult.count > 0 {\n            for i in 0..<fetchResult.count{\n                var mediaItem = Media()\n                //Used for fetch Image//\n                imgManager.requestImage(for: fetchResult.object(at: i) as PHAsset , targetSize: CGSize(width: 400, height: 400), contentMode: .aspectFit, options: requestOptions, resultHandler: {\n                    image, error in\n                    let imageOfVideo = image! as UIImage\n                    mediaItem.image = imageOfVideo;\n                    //Used for fetch Video//\n                    imgManager.requestAVAsset(forVideo: fetchResult.object(at: i) as PHAsset, options: PHVideoRequestOptions(), resultHandler: {(avAsset, audioMix, info) -> Void in\n                        if let asset = avAsset as? AVURLAsset {\n                            let videoData = NSURL(string: "\\(asset.url)")\n                            let duration : CMTime = asset.duration\n                            let durationInSecond = CMTimeGetSeconds(duration)\n                            print(durationInSecond)\n                            mediaItem.videoURL = videoData!\n                            self.mediaArray.append(mediaItem)\n                            print(self.mediaArray.count)\n\n\n                        }\n\n                    })\n                })\n            }\n\n        }\n        else{\n            //showAllertToImportImage()//A function to show alert\n        }\n    }\n}\n

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我认为这与我上传视频的时间无关，因为我可以录制视频并从手机上传，但不能从手机本身上传；我只是将 url 转移到 nextVC，如下所示：

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let videoVC = PrepareVideoVC()\n        videoVC.url = outputFileURL as URL!\n        self.navigationController?.pushViewController(videoVC, animated: false)\n

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我调查了这个文件 \xe2\x80\x9c \xe2\x80\x9d 无法\xe2\x80\x99t 被打开，因为你没有\xe2\x80\x99t 有权限查看它，但无法真正弄清楚如何实现它

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我还遇到了/sf/answers/2906201581/但我再次尝试实现它，但无法让它不给我错误

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另外模拟器可以上传，手机不行

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它正在尝试从此目录获取文件：

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NSFilePath=/var/mobile/Media/DCIM/\n

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Answer 1

你可以试试

url.startAccessingSecurityScopedResource()
<...>
url.stopAccessingSecurityScopedResource()