https://github.com/yamill/react-native-orientation
github地址

我简易的罗列几个步骤
1.npm install react-native-orientation --save
2.react-native link react-native-orientation

简单使用
引入
import Orientation from 'react-native-orientation';

1.在进去这个页面的时候强制横屏

componentWillMount() {
       Orientation.lockToLandscape();
}

2.在退出当前页面的时候强制竖屏

componentWillUnmount() {
       Orientation.lockToPortrait();
}

这样就可以满足某一页面横屏的需求,下面的是系统的写法,还能控制转换

export default class AppScreen extends Component {
  // ...

  componentWillMount() {
    // The getOrientation method is async. It happens sometimes that
    // you need the orientation at the moment the JS runtime starts running on device.
    // `getInitialOrientation` returns directly because its a constant set at the
    // beginning of the JS runtime.

     // 判断横竖屏幕
    const initial = Orientation.getInitialOrientation();
    if (initial === 'PORTRAIT') {
      // do something
    } else {
      // do something else
    }
  },

  componentDidMount() {
    // this locks the view to Portrait Mode
    Orientation.lockToPortrait();

    // this locks the view to Landscape Mode
    // Orientation.lockToLandscape();

    // this unlocks any previous locks to all Orientations
    // Orientation.unlockAllOrientations();

    Orientation.addOrientationListener(this._orientationDidChange);
  },

  _orientationDidChange = (orientation) => {
    if (orientation === 'LANDSCAPE') {
      // do something with landscape layout
    } else {
      // do something with portrait layout
    }
  },

  componentWillUnmount() {
    Orientation.getOrientation((err, orientation) => {
      console.log(`Current Device Orientation: ${orientation}`);
    });


    // Remember to remove listener
    Orientation.removeOrientationListener(this._orientationDidChange);
  }

  render() {
    // ...

    return (
      // ...
    )
  }
}