问如何在带有照片框架的iOS 9中获取访问照片的权限

EN

PHPhotoLibrary.requestAuthorization { (status) -> Void in

            switch status{
            case .Authorized:
                dispatch_async(dispatch_get_main_queue(), {
                    print("Authorized")
                 })
                break
            case .Denied:
                dispatch_async(dispatch_get_main_queue(), {
                    print("Denied")
                })
                break
            default:
                dispatch_async(dispatch_get_main_queue(), {
                    print("Default")
                })
                break
            }
        }