Ios 环信 获取不到好友请求数据

    NSDictionary *loginInfo = [[[EaseMob sharedInstance] chatManager] loginInfo];
    NSString *loginName = [loginInfo objectForKey:kSDKUsername];
    if(loginName && [loginName length] > 0) {
        NSArray * applyArray = [[InvitationManager sharedInstance] applyEmtitiesWithloginUser:loginName];
        NSLog(@"applyArray = %@",applyArray);
        [self.dataSource addObjectsFromArray:applyArray];
        [self.tableView reloadData];
    }
输出的好友请求数组每次都是为空，求指教