iOS开发AFN3.0中json解析返回3840获取error自己解析

爱被打了一巴掌 2023-10-17 12:23 5阅读 0赞

因为后台原因，如果请求失败，返回的error错误信息是AFN中默认json解析数据，这时会返回解析失败的3840信息，如果这时想获取自己去解析不需要返回json数据，那么就需要改变默认的解析方式，这时关键问题如下：

原来响应序列器设置为

AFHTTPResponseSerializer \*responseSerializer = \[AFJSONResponseSerializer serializer\];//此处返回的结果是不可改的；

需要设置为如下才可以：

AFHTTPResponseSerializer \*responseSerializer = \[AFJSONResponseSerializer serializerWithReadingOptions: NSJSONReadingMutableContainers\];//允许返回的结果可改。

+ (void)initialize{
        
        manager=[AFHTTPSessionManager manager];
        
        manager.responseSerializer.acceptableContentTypes=[manager.responseSerializer.acceptableContentTypes setByAddingObjectsFromArray:@[@"text/plain",@"text/html",@"application/json",@"multipart/form-data"]];
        
        manager.requestSerializer = [AFJSONRequestSerializer serializer];
        manager.responseSerializer = [AFJSONResponseSerializer serializerWithReadingOptions:NSJSONReadingMutableContainers];//允许返回的结果可改
    }
    
    + (void)GET:(NSString *)urlStr parameters:(id)parameters
        success:(void (^)(id responseObject))success
        failure:(void (^)(NSError *error))failure {
    
        [manager GET:urlStr parameters:parameters progress:^(NSProgress * _Nonnull downloadProgress) {
            
        } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            
            success(responseObject);
            
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
    //        NSError *underError = error.userInfo[@"NSUnderlyingError"];
    //        
    //        NSData *data=underError.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey];
    //        
    //        NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    //        NSLog(@"%@",str);
            
            NSData *data = error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey];
            if (data != nil) {
    //            id body = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
                NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
                NSLog(@"error--%@", str); //就可以获取到错误时返回的body信息。
            }
            
            failure(error);
            
        }];
    }

如下图所示：

![Center][]

[http://www.oschina.net/question/2296401\_225963][http_www.oschina.net_question_2296401_225963]

[http://www.fx114.net/qa-227-152024.aspx][http_www.fx114.net_qa-227-152024.aspx]

[http://www.jianshu.com/p/03bf22adaf11][http_www.jianshu.com_p_03bf22adaf11]

[Center]: https://img-blog.csdn.net/20170406191653308?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvTWluZ2dlUWluZ2NodW4=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[http_www.oschina.net_question_2296401_225963]: http://www.oschina.net/question/2296401_225963
[http_www.fx114.net_qa-227-152024.aspx]: http://www.fx114.net/qa-227-152024.aspx
[http_www.jianshu.com_p_03bf22adaf11]: http://www.jianshu.com/p/03bf22adaf11