函数+ IOS的​​返回类型冲突 [英] conflict in return type of the function + IOS

问题描述

我正在构建一个iOS应用，并且正在使用AFNetworking库将数据发布到服务器.

I'm building an iOS app and i'm using AFNetworking library to POST data to the server.

我创建了一个函数来发布数据，并在应用程序的不同类中调用此函数.

I have created a function to post data and calling this function in different classes in my app.

我在名为"responseObject"的变量中获得请求的响应，并且我想在return语句中返回它，我无法识别responseObject的返回类型，因此无法确定该函数的返回类型，我尝试使用NSDictionary但得到以下警告:

I am getting response of the request in the variable called "responseObject" , And i want to return this in the return statement i am not able to identify the return type of responseObject and hence of the function,I tried using NSDictionary but getting following warning:

Conflicting return type in implementation of 'postData:parameters:': 'void' vs 'NSDictionary *'

这是我的代码:

-(void)postData:(NSString*)postUrl parameters:(NSDictionary *)params{


    NSURL *baseURL = [NSURL URLWithString:@"http://xyz:2424/api/"];

    AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc] initWithBaseURL:baseURL];
    manager.requestSerializer = [AFJSONRequestSerializer serializer]; manager.responseSerializer = [AFJSONResponseSerializer serializer];
    [manager POST:postUrl parameters:params success:^(NSURLSessionDataTask *task, id responseObject)

     {

         NSLog(@"response   %@",responseObject);

     }
                failure:^(NSURLSessionDataTask *task, NSError *error) {
                NSLog(@"\n============== ERROR ====\n%@",error);

              UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error adding book" message:[error localizedDescription] delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil]; [alertView show];


          }];

}

推荐答案

这意味着您的postData方法期望返回NSDictionary，但是您的方法说"void"-请查看头文件中的方法定义，我希望是这样:

This means your postData method is expecting an NSDictionary to be returned, however your method says "void" - have a look at the method definition in your header file , I expect it is:

-(NSDictionary*)postData:(NSString*)postUrl parameters:(NSDictionary *)params;

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