添加带有图像的uinavigationbar按钮时出错

super.viewdidload()。 //汉堡菜单 //button.addTarget(target,action:nil,for:.touchupinside) self.navigationitem.leftbarbuttonitems=[barbuttonitem].但是,按钮移动到中心而不是保持在左侧,图像也会变大。你们能帮我吗?

  override func viewDidLoad() {
        super.viewDidLoad()
        //Delegate TableView
        self.tableViewTopSell.delegate = self
        //SetupNavBarCustom
        self.navigationController?.navigationBar.CustomNavigationBar()
        let logo = UIImage(named: "tag.png")
        let imageView = UIImageView(image:logo)
        self.navigationItem.titleView = imageView
        //Hamburg Menu
        self.navigationItem.leftBarButtonItem = nil
        let button = UIButton(type: .custom)
        button.setImage(UIImage (named: "hamburgIcon"), for: .normal)
        button.frame = CGRect(x: 0.0, y: 0.0, width: 35.0, height: 35.0)
        //button.addTarget(target, action: nil, for: .touchUpInside)
        let barButtonItem = UIBarButtonItem(customView: button)
        self.navigationItem.leftBarButtonItems = [barButtonItem]