OBJ-C POST JSON（正文？）到端点问题

Question

使用Mac上的Postman，我已确认GET/POST工作到我的端点。在我的iPad上，我试图做同样的事情，但只能获得连接和返回数据（仅适用于 测试）。

在Postman中，我有设备的关键和的值[{“ name”：“ 1”，“值”：[121,182,243]}] 从邮递员我可以发送，物理对象响应，服务器返回所有设备的数组，而没有其他设备（我不需要，但这就是它的发展）。 Postman确实在身体下面具有X-WWW形式的纯编码。这是邮递员预期的。

从我的iPad中，以下代码始终返回错误400，这意味着我正在提供服务器没有期望的东西。

+(void)makeRequest {

NSError *error = nil;

storedURL = [[NSUserDefaults standardUserDefaults] objectForKey:@"eb-ipaddress-saved"];
NSString *urlstring = [NSString stringWithFormat:@"http://%@",storedURL];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlstring] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];

NSString *jsonPostBody = @"{\"devices\":[{\"name\":\"1\",\"values\":[121,182,243]}]}";
NSData *postData = [jsonPostBody dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO];
NSString *postLength = [NSString stringWithFormat:@"%lu",(unsigned long)[postData length]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];

NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
    if(httpResponse.statusCode == 200)
    {
        NSError *parseError = nil;
        NSDictionary *responseDictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
        NSLog(@"The response is - %@",responseDictionary);
        NSInteger success = [[responseDictionary objectForKey:@"success"] integerValue];
        if(success == 1)
        {
            NSLog(@"SUCCESS");
        }
        else
        {
            NSLog(@"FAILURE");
        }
    }
    else
    {
        NSLog(@"Error");
    }
}];
[dataTask resume];

}

我的4个日志从上方（为了清楚地删除）返回： urlstring JSONPOSTBODY {“ deception”：[{“ name”：“ 1”，“ values”：[121,182,243]}]}} httpresponse 400 错误，

我最终将在生产时切换到我的帖子中的变量。

谢谢

Answer 1

多亏了Larme的答案，我使用了Postman的代码，这起作用了。

+(void)makeRequest 
{

dispatch_semaphore_t sema = dispatch_semaphore_create(0);

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://192.168.90.55:3000/dmx/set"]
  cachePolicy:NSURLRequestUseProtocolCachePolicy
  timeoutInterval:10.0];
NSDictionary *headers = @{
  @"Content-Type": @"application/x-www-form-urlencoded"
};

[request setAllHTTPHeaderFields:headers];
NSMutableData *postData = [[NSMutableData alloc] initWithData:[@"devices=[{\"name\":\"1\",\"values\":[121,182,243]}]" dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:postData];

[request setHTTPMethod:@"POST"];

NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
  if (error) {
    NSLog(@"%@", error);
    dispatch_semaphore_signal(sema);
  } else {
    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
    NSError *parseError = nil;
    NSDictionary *responseDictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
    NSLog(@"%@",responseDictionary);
    dispatch_semaphore_signal(sema);
  }
}];
[dataTask resume];
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
}