开发者工具中的模拟器导航栏正常显示，页面渲染报错&微信小程序教程。到了手机预览是却消失了。


这是app.json里的{"pages":["pages/homePage/homePage","pages/index/index","pages/shoping/shoping","pages/my/my","pages/index/details/details"],"window":{"navigationBarBackgroundColor": "black","navigationBarTextStyle":"white"},"tabBar": {"borderStyle": "white","position": "bottom","list": [{"pagePath": "pages/homePage/homePage","text": "首页","iconPath": "images/tab/yuedu.png","selectedIconPath": "images/tab/yuedu_hl.png"},{"pagePath": "pages/index/index","text": "商品","iconPath": "images/tab/yuedu.png","selectedIconPath": "images/tab/yuedu_hl.png"},{"pagePath": "pages/shoping/shoping","text": "购物车","iconPath": "images/tab/yuedu.png","selectedIconPath": "images/tab/yuedu_hl.png"},{"pagePath": "pages/my/my","text": "我的","iconPath": "images/tab/yuedu.png","selectedIconPath": "images/tab/yuedu_hl.png"}]}}
这是其他的单独页面的json文件里的
{"navigationBarTitleText": "商品"}


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