react-native-camera摄像机视图

react-native-camera 是 React Native 的摄像头 viewport。这个模块应用于开发的早期阶段，它支持摄像头的转换和基本图片捕捉。

使用示例：

var React = require('react-native');
var {
  AppRegistry,
  StyleSheet,
  Text,
  View,
} = React;
var Camera = require('react-native-camera');

var cameraApp = React.createClass({
  render: function() {
    return (
      <View>
        <TouchableHighlight onPress={this._switchCamera}>
          <View>
            <Camera
              ref="cam"
              aspect="Stretch"
              orientation="PortraitUpsideDown"
              style={{height: 200, width: 200}}
            />
          </View>
        </TouchableHighlight>
      </View>
    );
  },
  _switchCamera: function() {
    this.refs.cam.switch();
  }
});

AppRegistry.registerComponent('cameraApp', () => cameraApp);