Ios 如何将字符串数据发布到API

我想将字符串数据发布到API中，我尝试使用下面的代码将其发送到服务器。我已经使用postman检查了api，它没有将字符串数据传递到服务器。我不知道是什么问题，需要帮助

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:reqURLStr]];
    [request setHTTPMethod:@"POST"];

**//Pass The String to server**
NSString *userUpdate =[NSString stringWithFormat:@"service_type=%@&ParcelSize=%@&ReceiverName=%@&MobileNumber=%@&Email=%@&DropOffHub=%@&PickupHub=%@" ,serviceType,pSize,rName,rMobile,rEmail,dropHubID,pickHubID];

NSData *data1 = [userUpdate dataUsingEncoding:NSUTF8StringEncoding];

[request setHTTPBody:data1];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:[data makeRestAPICall:reqURLStr] forHTTPHeaderField:@"Authorization"];


NSError *err;
NSURLResponse *response;

NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];

NSString *resSrt = [[NSString alloc]initWithData:responseData encoding:NSASCIIStringEncoding];


NSLog(@"got response==%@", resSrt);
if(resSrt)
{
    NSLog(@"got response");
}
else
{
    NSLog(@"fail to connect");
}
return resSrt;

简单回答

-(void)postJsonDataToServer{
NSDictionary *parameters = @{
                                 @"service_type": serviceType,
                                 @"ParcelSize": pSize,
                                 @"ReceiverName": rName,
                                 @"MobileNumber": rMobile,
                                 @"Email" : rEmail,
                                 @"DropOffHub" : dropHubID,
                                 @"PickupHub" : pickHubID
                                 };

    NSData *data = [NSJSONSerialization dataWithJSONObject:parameters options:0 error:nil];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http:/api/order/add"]];
    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/json;charset=UTF-8" forHTTPHeaderField:@"content-type"];
    NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
    NSURLSessionUploadTask *dataTask = [session uploadTaskWithRequest: request
                                                             fromData:data completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                                                                 if(data != nil)
                                                                 {
                                                                     NSError *parseError = nil;
                                                                     //If the response is in dictionary format
                                                                     NSDictionary *res = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];

                                                                     //OR
                                                                     //If the response is in array format
                                                                     NSArray *res = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];

                                                                     NSLog(@"The res is - %@",res);

                                                                 }
                                                                 else
                                                                     NSLog(@"Data returned the parameter is nil here");
                                                             }];
    [dataTask resume];


}

简单回答

-(void)postJsonDataToServer{
NSDictionary *parameters = @{
                                 @"service_type": serviceType,
                                 @"ParcelSize": pSize,
                                 @"ReceiverName": rName,
                                 @"MobileNumber": rMobile,
                                 @"Email" : rEmail,
                                 @"DropOffHub" : dropHubID,
                                 @"PickupHub" : pickHubID
                                 };

    NSData *data = [NSJSONSerialization dataWithJSONObject:parameters options:0 error:nil];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http:/api/order/add"]];
    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/json;charset=UTF-8" forHTTPHeaderField:@"content-type"];
    NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
    NSURLSessionUploadTask *dataTask = [session uploadTaskWithRequest: request
                                                             fromData:data completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                                                                 if(data != nil)
                                                                 {
                                                                     NSError *parseError = nil;
                                                                     //If the response is in dictionary format
                                                                     NSDictionary *res = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];

                                                                     //OR
                                                                     //If the response is in array format
                                                                     NSArray *res = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];

                                                                     NSLog(@"The res is - %@",res);

                                                                 }
                                                                 else
                                                                     NSLog(@"Data returned the parameter is nil here");
                                                             }];
    [dataTask resume];


}

---

从响应中得到了什么错误？{状态代码：400，标题{“缓存控制”=“无缓存”；“内容长度”=0；日期=“Sat，2017年6月3日06:37:33 GMT”；Expires=“-1”；Pragma=“无缓存”；Server=“Microsoft IIS/7.5”；“X-AspNet-Version”=“4.0.30319”；“X-Powered-By”=“ASP.NET”；}I“po响应”它向我显示了这个你能分享你的请求URL吗？这样我就可以查看metterNSString*apiURL=@“http:/api/order/add”；[self-makeRestAPICall:apiURL]；你从响应中得到了什么错误？{状态代码：400，标题{“缓存控制”=“无缓存”；“内容长度”=0；日期=“2017年6月3日周六06:37:33 GMT”；过期=“-1”Pragma=“no cache”；Server=“Microsoft IIS/7.5”；“X-AspNet-Version”=“4.0.30319”；“X-Powered-By”=“ASP.NET”；}I“po respond”并显示此信息。您可以共享您的请求URL吗？这样我就可以查看metternstring*apiURL=@“http:/api/order/add”；[自制餐厅：apiURL]；欢迎兄弟会