1. J'utilise react@16.0.0-alpha.12， react-native@0.45.1 et il peut être utilisé normalement dans la simulation, mais un avertissement apparaît dans l'outil de débogage Chrome :

ExceptionsManager.js:71 Warning: PropTypes has been moved to a separate package. Accessing React.PropTypes is no longer supported and will be removed completely in React 16. Use the prop-types package on npm instead. (https://fb.me/migrating-from-react-proptypes)

ExceptionsManager.js:71 Warning: React.createClass is no longer supported. Use a plain JavaScript class instead. If you're not yet ready to migrate, create-react-class is available on npm as a drop-in replacement. (https://fb.me/migrating-from-react-create-class)

Et je ne peux pas utiliser les outils de développement React pour le débogage

1. Mon code :

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 * @flow
 */

import React, { Component } from 'react'
import {
  AppRegistry,
  View,
  Text,
  StyleSheet
} from 'react-native'
export default class second extends Component{
  render () {
    return (
      <View style={{
         flex: 1,
        flexDirection: 'column',
        justifyContent: 'center',
        alignItems: 'center',
        backgroundColor: 'ghostwhite'
      }}>
        <Text style={{fontSize: 28, color: 'cadetblue'}}>class extends</Text>
      </View>
    )
  }
  componentDidMount () {
    console.log('==========')
    this.testConsolelog()
  }
  testConsolelog () {
    console.log('e3423423432')
  }
}

const styles2 = StyleSheet.create({
  bigblue: {
    color: 'blue',
    fontWeight: 'bold',
    fontSize: 30,
  },
  red: {
    color: 'red',
  },
});
AppRegistry.registerComponent('second', () => second);