uniappでナビゲーションバーの非表示と表示を設定する方法

let pages = getCurrentPages()
let page = pages[pages.length - 1];
let currentWebview = page.$getAppWebview();

let titleNView = currentWebview.getStyle().titleNView
console.log(titleNView)
//打印结果
{
"autoBackButton": true,
"backgroundColor": "#F8F8F8",
"dock": "top",
"height": 44,
"position": "dock",
"statusbar": {},
"tags": [],
"titleColor": "#000000",
"titleText": "纸板入库",
"type": "default"
}

titleNView.autoBackButton = false

currentWebview.setStyle({
titleNView:titleNView
})

uni.setNavigationBarTitle({
   title: '新的标题'
});