iOS AFN 封装POST网络请求(AFURLSessionManager) （续二） download下载方法

接上一篇文章，增加下载方法，如需要进度，在这里 progress:nil 传入 NSProgress 对象的地址就行了

- (void)downloadTaskWithURL:(NSURL *)URL destination:(void(^)(NSURL *targetPath, NSURLResponse *response))destination completionHandler:(void (^)(NSURLResponse *response, NSURL *filePath,NSError *error))completionHandler

{

    NSURLRequest *request = [NSURLRequestrequestWithURL:URL];

    

    NSURLSessionDownloadTask *downloadTask = [_sessionManagerdownloadTaskWithRequest:requestprogress:nildestination:^NSURL *(NSURL *targetPath,NSURLResponse *response) {

        NSURL *documentsDirectoryURL = [[NSFileManagerdefaultManager] URLForDirectory:NSDocumentDirectoryinDomain:NSUserDomainMaskappropriateForURL:nilcreate:NOerror:nil];

        destination(targetPath, response);

        return [documentsDirectoryURLURLByAppendingPathComponent:[responsesuggestedFilename]];

    } completionHandler:^(NSURLResponse *response,NSURL *filePath, NSError *error) {

        completionHandler(response, filePath, error);

        NSLog(@"File downloaded to: %@", filePath);

    }];

    [downloadTask resume];

}