我正在玩这个library.它说我必须用代码初始化它STPopupController*popupController=[[STPopupControlleralloc]initWithRootViewController:[ViewControllernew]];[popupControllerpresentInViewController:self];我尝试用下面的代码来做到这一点(HelpersNear是UIViewController的名称)varpopup=STPopupController(rootViewController:HelpersNear)popup.prese