用UNAIPP写APP怎么获取当前页面的标题?

let pages = getCurrentPages();  
var page = pages[pages.length - 1];  
// #ifdef APP-PLUS  
 var currentWebview = page.$getAppWebview();  
 console.log('获取标题', JSON.stringify(currentWebview.getStyle()))  
  p.pageurl = currentWebview.__uniapp_route;  
  // #endif  
  // #ifdef H5  
 p.pagename = page.$holder.navigationBarTitleText;  
 p.pageurl = page.__page__.fullPath;  
 // #endif

页面标题写在pages.json 里面

{  
     "path" : "pages/payment/Order",  
      "style" :                                                                                      
            {  
                "navigationBarTitleText": "收银",  
                "enablePullDownRefresh": false  
            }  
}