如何发出json post请求？

Posted 2023-03-10

【中文标题】如何发出json post请求？

【英文标题】：How to make json post request?

【发布时间】：2016-02-12 10:31:11

【问题描述】：

我必须使用以下请求参数发出 json post 请求，

   
    "method":"login", 
    "data":  
        "username":"korea", 
        "password":"123456" 
     
 

我使用以下代码发出请求，

NSString *jsonRequest = [NSString stringWithFormat:@"""\"\method:\"\login\"\"\,""\data:\"\"\"username\":\"%@\",\"password\":\"%@\"",username,password];
    NSLog(@"Request: %@", jsonRequest);

    NSURL *url = [NSURL URLWithString:@"http://myurl..."];

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
    NSData *requestData = [NSData dataWithBytes:[jsonRequest UTF8String] length:[jsonRequest length]];

    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setValue:[NSString stringWithFormat:@"%d", [requestData length]] forHTTPHeaderField:@"Content-Length"];
    [request setHTTPBody: requestData];

    NSURLConnection *connection = [NSURLConnection connectionWithRequest:request delegate:self];

我必须得到回应，但我无法得到回应

【问题讨论】：

你检查过这个***.com/a/15749527/5362916

参考***.com/questions/15516823/…

是的，我已经尝试了这些示例，但问题仍然存在

您的连接失败了吗？您收到什么错误？

@StanlyMoses ***.com/questions/33767908/… 将此类用于普通方法

【参考方案1】：

试试这个

    NSDictionary *objectDic = @@"username" : username, @"password" : password;
    NSDictionary *dataDic = @@"data" : objectDic;
    NSDictionary *methodDic = @@"method" : @"login", @"data": dataDic;

    NSData *requestData = [NSJSONSerialization dataWithJSONObject:methodDic
                                               options:NSJSONWritingPrettyPrinted
                                                 error:nil];
    [request setHTTPBody: requestData];