通常我们在app.json中统一设置title

 "window": {     "backgroundTextStyle": "light",     "navigationBarBackgroundColor": "#FFFFFF",     "navigationBarTitleText": "心灵密友",     "navigationBarTextStyle": "black"   },

在单独页面要修改的话可以在，对应页面的json中修改

"backgroundTextStyle": "light", "navigationBarBackgroundColor": "#FFFFFF", "navigationBarTitleText": "单独页面", "navigationBarTextStyle": "black"

也可在js中动态加载

onLoad: function (options) {     wx.setNavigationBarTitle({       title: '当前页面'  //修改title     }) },