ios - 在POST请求中发送JSON对象AFNetworking，iOS

我正在使用AFNetworking将数据发布到网络上。我拥有的信息是URI，即baseURL/post_user_info，他们希望input作为包含每个名称/值对的JSON对象。在下面编写的代码中，我在字典中设置了名称/值对。我的问题是如何使其为json并将其作为输入值发送？

NSString *string = [NSString stringWithFormat:@"%@?post_user_info",BaseURLString];
NSString *escapedPath = [string stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

    NSDictionary *params = @{@"input_1": @"hello world",
                             @"input_2": @"[email protected]",
                             @"input_3": @"newworldorder"};
NSData* jsonData = [NSJSONSerialization dataWithJSONObject:params options:kNilOptions error:nil];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPBody:jsonData];

[manager POST:escapedPath parameters:[[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding] progress:nil success:^(NSURLSessionTask *task, id responseObject)
 {
     NSLog(@"%@",responseObject);
 }failure:^(NSURLSessionTask *operation, NSError *error)
 {
     NSLog(@"%@",[error localizedDescription]);
 }];

我已经更新了代码，因为现在已经生成了JSON，但是如果我现在运行代码，它将给我错误：400，这意味着如果input_values为空，则会输出错误的请求错误。

最佳答案

@interface AFJSONRequestSerializer：AFHTTPRequestSerializer


  使用is a subclass of的AFJSONRequestSerializer that encodes parameters as JSON AFHTTPRequestSerializer NSJSONSerialization。


添加此AFJSONRequestSerializer用于发送JSON而不是原始数据添加此并尝试一次

    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];

例如

NSString *string = [NSString stringWithFormat:@"%@?post_user_info",BaseURLString];
NSString *escapedPath = [string stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];

 /**************  karthik Code added  ******************/
 AFHTTPSessionManager* manager = [[AFHTTPSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
 manager.responseSerializer = [AFHTTPResponseSerializer serializer];
 manager.requestSerializer = [AFJSONRequestSerializer serializer];
      /**************  karthik Code added  ******************/

    NSDictionary *params = @{@"1": @"hello world",
                             @"2": @"[email protected]",
                             @"3": @"newworldorder"};
[manager POST:escapedPath parameters:params progress:nil success:^(NSURLSessionTask *task, id responseObject)
     {
         NSLog(@"%@",responseObject);
          NSError *error = nil;
        NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseObject options:0 error:nil];
           NSLog(@"json == %@", json);

     } failure:^(NSURLSessionTask *operation, NSError *error) {
         NSLog(@"%@", [error localizedDescription]);
     }];

更新参数

NSDictionary *params = @{@"1": @"hello world",
                         @"2": @"[email protected]",
                         @"3": @"newworldorder"};
 NSMutableDictionary *modify = [NSMutableDictionary new];
[modify  setObject:params forKey:@"input_values"];

你得到的输出