代码如下： {  "pages": [     "pages/index/index"   ],   "window": {     "backgroundTextStyle": "light",     "navigationBarBackgroundColor": "#fff",     "navigationBarTitleText": "WeChat",     "navigationBarTextStyle": "black"   }, } 出错如下： undefined Expecting 'STRING', got }    8 |     "navigationBarTitleText": "WeChat",    9 |     "navigationBarTextStyle": "black" > 10 |   },      |   ^   11 | }   12 | 请问这个哪里有问题呀？