afnetworking网络请求，ios中的网络请求示例代码

<pre name="code" class="objc">-(void)myActivityAddClick:(UIButton *)btn
{

//注意url中不能有空格
    NSString *url = @"xxx";

    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    NSMutableDictionary *params = [NSMutableDictionary new];
    
    NSUserDefaults *userRealNameDefaults = [NSUserDefaults standardUserDefaults];
    
    NSString *userid = [userRealNameDefaults objectForKey:@"user_id"];
    [params setValue:userid forKey:@"app_user_id"];
    [params setValue:self.activityName forKey:@"activity_name"];
    [params setValue:self.activityTime forKey:@"activity_time"];
    [params setValue:self.activityAward forKey:@"activity_award"];
    [params setValue:self.activityCount forKey:@"activity_awardnum"];
    
    [manager POST:url parameters:params success:^(AFHTTPRequestOperation * _Nonnull operation, id  _Nonnull responseObject) {
        NSLog(@"%@",responseObject);
        NSString *messageStr  = [[responseObject objectForKey:@"datas"]objectForKey:@"msg" ];
        [messageStr isEqualToString:@"ok"];
        if([messageStr isEqualToString:@"ok"]){
            _hud = [MBProgressHUD showHUDAddedTo:self.tableView animated:YES];
            _hud.mode = MBProgressHUDModeText;
            _hud.labelText = @"添加成功";
            _hud.removeFromSuperViewOnHide = YES;
             [_hud hide:YES afterDelay:1];
            
            [self performSelector:@selector(backToNext) withObject:nil afterDelay:1.0f];
            
          
        }
        
    } failure:^(AFHTTPRequestOperation * _Nullable operation, NSError * _Nonnull error) {
        
//        hud = [MBProgressHUD showHUDAddedTo:_MyTableView animated:YES];
//        hud.mode = MBProgressHUDModeText;
//        hud.labelText = @"加载失败";
//        hud.removeFromSuperViewOnHide = YES;
//        [hud hide:YES afterDelay:1];
        NSLog(@"failure");
    }];

}