IOS swift 创建应用程序文件夹错误

Question

我在为PhotoLibrary. 有谁知道那里有什么问题？

            var albumPlaceholder:PHObjectPlaceholder!
            //create the folder
            NSLog("\nFolder \"%@\" does not exist\nCreating now...", albumName)
            PHPhotoLibrary.sharedPhotoLibrary().performChanges({
                let request = PHAssetCollectionChangeRequest.creationRequestForAssetCollectionWithTitle(albumName)
                albumPlaceholder = request.placeholderForCreatedAssetCollection
                },
                completionHandler: {(success:Bool, error:NSError!)in
                    NSLog("Creation of folder -> %@", (success ? "Success":"Error!"))
                    self.albumFound = (success ? true:false)
                    if(success){
                        let collection = PHAssetCollection.fetchAssetCollectionsWithLocalIdentifiers([albumPlaceholder.localIdentifier], options: nil)
                        self.assetCollection = collection?.firstObject as PHAssetCollection
                    }
            })

这段代码一直打印Error!在控制台上。提前致谢！

[更新] 我的错误是这样的。

Creation of folder -> Error! ViewWillAppear Error Domain=NSCocoaErrorDomain Code=2047 "Photos Access not allowed (authorization status 0)" UserInfo=0x7fd1fb664cc0 {NSLocalizedDescription=Photos Access not allowed (authorization status 0)}

Answer 1

您无权访问照片库。您需要先请求它。因此，请使用以下代码：

PHPhotoLibrary.requestAuthorization
{ (PHAuthorizationStatus status) -> Void in
     switch (status)
     {
        case .Authorized:
            // Permission Granted
            println("Write your code here")
        case .Denied:
            // Permission Denied
            println("User denied")
        default:
            println("Restricted")
        }
    }

有关更多信息，请参阅：requestAuthorization