如何使用参数调用IOS中的服务？

我已经给出了一个url和三个参数来在应用程序中使用和调用这些服务，我必须创建一个带有id、用户名和密码的登录页面，如果它们匹配，那么用户应该移动到下一个页面，我对如何启动代码有点困惑。有人能帮我吗。请让我知道你有任何例子的代码

我有登录名、密码和apikey匹配的代码，如果都正确，请导航到其他页面

-(void)login
{


    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
    NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
    NSURL *url = [NSURL URLWithString:@"Your Login URL"];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
                                                           cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                       timeoutInterval:60.0];

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


    [request addValue:@"*/*" forHTTPHeaderField:@"Accept"];

    [request setHTTPMethod:@"POST"];

    NSString *mapData = [NSString stringWithFormat:@"username=admin&password=testing&api_key=bf45c093e542f057c123ae7d6"];

       NSData *postData = [mapData dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

    [request setHTTPBody:postData];


    NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {

        if(error == nil)
        {

            NSString * text = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];


            NSError *error = nil;
            NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];

            if(error!=nil)
            {
                NSLog(@"error = %@",error);

            }

            dispatch_async(dispatch_get_main_queue(), ^{
                [self checkUserSuccessfulLogin:json];
            });
        }
        else{

            NSLog(@"Error : %@",error.description);

        }


    }];


    [postDataTask resume];

}
- (void)checkUserSuccessfulLogin:(id)json
{
  //  NSError *error;
   NSDictionary *dictionary = (NSDictionary *)json;


    if ([[dictionary allKeys] containsObject:@"login"])
    {
        if ([[dictionary objectForKey:@"login"] boolValue])
        {

            if(checkBoxSelected == YES)
            {
                NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
                NSString* textField1Text = usernameField.text;
                [defaults setObject:textField1Text forKey:@"textField1Text"];

                NSString *textField2Text = passwordField.text;
                [defaults setObject:textField2Text forKey:@"textField2Text"];
                [defaults synchronize];
            }
            NSString *strID = [[NSUserDefaults standardUserDefaults] stringForKey:@"textField1Text"];
            NSString *strPWD = [[NSUserDefaults standardUserDefaults] stringForKey:@"textField2Text"];

            [[NSUserDefaults standardUserDefaults] setValue:[dictionary objectForKey:@"user_id"] forKey:@"CurrentUserLoggedIn"];
          NSString *strUser = [[NSUserDefaults standardUserDefaults] stringForKey:@"CurrentUserLoggedIn"];

            [[NSUserDefaults standardUserDefaults]synchronize];
            [self saveLoginFileToDocDir:dictionary];


            ItemManagement *i = [[ItemManagement alloc]init];
            [self.navigationController pushViewController:i animated:YES];

        }
        else
        {
            NSLog(@"Unsuccessful, Try again.");
            UIAlertView *alertLogin = [[UIAlertView alloc]initWithTitle:@"Error" message:@"Wrong Username Or Password" delegate:self cancelButtonTitle:@"cancel" otherButtonTitles:nil];
            [alertLogin show];
        }
    }
}




- (void)saveLoginFileToDocDir:(NSDictionary *)dictionary
{
    NSArray *pListpaths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
    NSString *pListdocumentsDirectory = [pListpaths objectAtIndex:0];
    NSString *path = [pListdocumentsDirectory stringByAppendingPathComponent:@"Login.plist"];

    BOOL flag = [dictionary writeToFile:path atomically:true];

    if (flag)
    {
        NSLog(@"Saved");
    }
    else
    {
        NSLog(@"Not Saved");
    }

}

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也许它肯定会对你有所帮助。

你知道如何调用url吗？