AFNetworking Block下载文件保存到沙盒

+ (void)downFileWithOption:(NSDictionary *)paramDic withInferface:(NSString*)dourl andBlock:(void (^)(BOOL isSuccess, NSError *error))block

{

    NSString *serverUrlPrefix = [NSString stringWithFormat:@"%@%@",SERVER_BASICE_URL,dourl];

    NSURL *requestUrl = [NSURL URLWithString:serverUrlPrefix];

  

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:requestUrl];

    NSString *charset = (__bridge NSString *)CFStringConvertEncodingToIANACharSetName(CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));

    

    [request setValue:[NSString stringWithFormat:@"application/x-www-form-urlencoded; charset=%@", charset] forHTTPHeaderField:@"Content-Type"];

    [request setHTTPMethod:@"POST"];

    

    NSString *parameterString= [NSString string];

    parameterString = [parameterString jsonFromDictionay:paramDic];

    NSDictionary *paramaterDic=[NSDictionary dictionaryWithObject:parameterString forKey:@"jsonString"];

    

    NSLog(@"request url = %@",dourl);

    NSLog(@"paramaterDic = %@",serverUrlPrefix);

    

    //获取沙盒路径  //自定义的方法 需要自己修改

    NSString *savePath = [[Util applicationDocumentsDirectory] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.pdf",[paramDic objectForKey:@"filename"]]];

    

    [request setHTTPBody:[AFQueryStringFromParametersWithEncoding(paramaterDic, NSUTF8StringEncoding) dataUsingEncoding:NSUTF8StringEncoding]];

    

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request];

    [operation setOutputStream:[NSOutputStream outputStreamToFileAtPath:savePath append:NO]];

    [operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {

        NSLog(@"is download：%f", (float)totalBytesRead / totalBytesExpectedToRead);

        

    }];

    

    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {

        block(YES, nil);

        NSLog(@"下载成功");

        

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

        

        block(NO, error);

        NSLog(@"下载失败");

        

    }];

    

    [operation start];

}