不能运行

[xueyaxuan]

在把pages包里面的js文件拷过去之后，又安装了react-native-sqlite-storage 之后运行了好多次一直出现Cannot read property 'open' of undefined问题

还有这个提示{
[intellij] [Warning] Couldn't import script at http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false. Debugging won't work: Try reloading the JS from inside the app, or Reconnect the debugger: {"type":"TransformError","message":"SyntaxError D:/React-Native_workspace/MyCalendarDemo/pages/mainAndroid.js: Only one default export allowed per module. (565:0)","snippet":"\u001b[0m \u001b[90m 563 | \u001b[39m }\n \u001b[90m 564 | \u001b[39m})\u001b[33m;\u001b[39m\n\u001b[31m\u001b[1m>\u001b[22m\u001b[39m\u001b[90m 565 | \u001b[39m\u001b[36mexport\u001b[39m \u001b[36mdefault\u001b[39m main\u001b[33m;\u001b[39m\n \u001b[90m | \u001b[39m\u001b[31m\u001b[1m^\u001b[22m\u001b[39m\u001b[0m","lineNumber":565,"column":0,"filename":"D:\React-Native_workspace\MyCalendarDemo\pages\mainAndroid.js","description":"D:/React-Native_workspace/MyCalendarDemo/pages/mainAndroid.js: Only one default export allowed per module. (565:0)","errors":[{"description":"D:/React-Native_workspace/MyCalendarDemo/pages/mainAndroid.js: Only one default export allowed per module. (565:0)","filename":"D:\React-Native_workspace\MyCalendarDemo\pages\mainAndroid.js","lineNumber":565}]}

}