IOS图片保存到本地相册

-(void)saveImage2<span style="font-family: Arial, Helvetica, sans-serif;">PhotosAlbum</span>{    UIImageWriteToSavedPhotosAlbum(_image.image, self, @selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:), nil);}- (void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{    NSString *message;    if (!error) {        message = @"成功保存到相册";    }else    {        message = [error description];    }    NSLog(@"message is %@",message);}