Ios 使用NSURLSession的服务器没有响应

我已经使用

NSURLSession

将我的应用程序与服务集成，我的问题是，当我使用

NSURLConnection

向服务器发送请求时，它会工作，但当我使用

NSURLSession

向服务器发送请求时，我会得到

null

响应。请告知

我的字典： NSURL连接： NSURL会议：

---

我也面临同样的问题，当我更改代码中的

HTTPHeaderField

值时，我得到了响应

以下是我的示例代码：

NSString *strReqParameters = [NSString stringWithFormat:@"user_email=your_email_id&method=your_methodname"];

NSURL *url = [NSURL URLWithString:@"Your_URL"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60];

[request addValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request addValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Accept"];
[request setHTTPMethod:@"POST"];

NSData *postData = [strReqParameters dataUsingEncoding:4];

[request setHTTPBody:postData];

NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {

    //response handler code here
}];

[task resume];

---

您是否尝试像上面那样设置请求参数？我正在使用一个字符串作为请求参数..这里的服务器需要NSDictionary数据，那么我如何像上面所说的那样发送响应？当我使用NSurlSession时，响应会出现，但当我使用NSurlSession时，此空响应来自服务器，我不知道您的服务器端代码。。您可以检查它，或者您可能需要在服务器端添加更多代码来处理此类请求。您是否使用POSTMAN插件尝试了此操作以查看您的url是否正常工作？

NSString *jsonString = [mainDict JSONRepresentation];

NSError *theError = nil;

NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];

NSURL *serviceUrl=[NSURL URLWithString:[NSString stringWithFormat:@"my url"]];

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

NSURLResponse *theResponse =[[NSURLResponse alloc]init];

// [MBProgressHUD showHUDAddedTo:self.view animated:YES];
//  [self performSelector:@selector(activityIndicater) withObject:self afterDelay:3];

NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&theResponse error:&theError];

NSMutableString *string = [[NSMutableString alloc] initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"jsonRequest is %@", string);

NSDictionary *jsonDictionaryResponse = [string JSONValue];
NSLog(@"jsonRequest is %@", jsonDictionaryResponse);

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"mu url"]
                                                           cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                       timeoutInterval:15.0];

                                                          cachePolicy:NSURLRequestUseProtocolCachePolicy

                                                       timeoutInterval:60.0];


//[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPMethod:@"POST"];

NSData* jsonData = [NSJSONSerialization dataWithJSONObject:params options:NSJSONWritingPrettyPrinted error:nil];

[request setHTTPBody:jsonData];

//[request setHTTPBody:[self encodeDictionary:params]];

//You now can initiate the request with NSURLSession or NSURLConnection, however you prefer. For example, with NSURLSession, you might do:

NSURLSessionTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if (error) {
        NSLog(@"dataTaskWithRequest error: %@", error);
    } else if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
        NSInteger statusCode = [(NSHTTPURLResponse *)response statusCode];

        if (statusCode != 200) {
            NSError *parseError;
            id responseObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
            NSLog(@"responseobject is %@",responseObject);

        } else {
            NSError *parseError;
            id responseObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];

            NSLog(@"else condtion");
            if (!responseObject) {
                NSLog(@"JSON parse error: %@", parseError);
            } else {
                NSLog(@"responseobject is %@",responseObject);
                //[self MainService:responseObject];
            }

            //if response was text/html, you might convert it to a string like so:  
            NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
            NSLog(@"final responseString = %@", responseString);
        }
    }
}];
[task resume];

NSString *strReqParameters = [NSString stringWithFormat:@"user_email=your_email_id&method=your_methodname"];

NSURL *url = [NSURL URLWithString:@"Your_URL"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60];

[request addValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request addValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Accept"];
[request setHTTPMethod:@"POST"];

NSData *postData = [strReqParameters dataUsingEncoding:4];

[request setHTTPBody:postData];

NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {

    //response handler code here
}];

[task resume];