react-native

react-native-android下NavigationBar的title居中

加一个内置的样式就可以了：

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<Navigator.NavigationBar
  navigationStyles={Navigator.NavigationBar.StylesIOS}
  routeMapper={{
    LeftButton: this.navBarLeftButton,
    RightButton: this.navBarRightButton,
    Title: this.navBarTitle,
  }}
  style={{ backgroundColor: 'gray' }}
  />

就是navigationStyles={Navigator.NavigationBar.StylesIOS}

参考：
https://github.com/facebook/react-native/pull/3028

相关讨论：
https://github.com/facebook/react-native/issues/3142