Swift中UIImageWriteToSavedPhotosAlbum之后图像的URL

在阅读了很多用ObjectivC编写的答案之后，我终于想出了如何使用Xpre 6.2在Swift中编写此答案：

ALAssetsLibrary().writeImageToSavedPhotosAlbum(image.CGImage, orientation: ALAssetOrientation(rawValue: image.imageOrientation.rawValue)!, completionBlock:{ (path:NSURL!, error:NSError!) -> Void in     println("(path)")        })