报错：'Navigator is deprecated and has been removed from this package. It can now be installed ' +
           'and imported from `react-native-deprecated-custom-components` instead of `react-native`. ' +
          'Learn about alternative navigation solutions at http://facebook.github.io/react-native/docs/navigation.html'

这是因为版本升级到0.43以上的话，Navigator过期了，不能从，react-native 获取

解决方案：

npm install react-native-deprecated-custom-components --save

然后在引用的地方

import  {Navigator} from 'react-native-deprecated-custom-components'