iOS13后，presentViewController不能鋪滿全屏（oc版）

 

BaseNavViewController *navVc = [[BaseNavViewController alloc] initWithRootViewController:loginVc];
    
    //加上下面這句=0的代碼，登錄頁就頂到最上面去了
    navVc.modalPresentationStyle = 0;
    
    [self presentViewController:navVc animated:YES completion:nil];