在通過navigator 進行頁面跳轉的過程中  一直報 這樣的錯誤

先看程式入口檔案index.android.js

import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,
  TouchableHighlight,  
  Navigator,
} from 'react-native';
import Welcome from './Welcome';

 class MyProject extends Component {

  render() {
       var defaultName = 'Welcome';
     var defaultComponent = Welcome;
    return (
    
    <Navigator
          //指定了預設的頁面，也就是啟動app之後會看到的第一屏，需要兩個引數，name跟component
          initialRoute={{ name: defaultName, component: defaultComponent }}
          configureScene={(route) => {
            //跳轉的動畫
            return Navigator.SceneConfigs.FadeAndroid;
          }}
          renderScene={(route, navigator) => {
            let Component = route.component;
            if(route.component){
                return <Component {...route.params} navigator={navigator} />
            }
          }} />
    );
  }

}



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

再看 第一個頁面 歡迎頁面：Welcome.js


import React, { Component } from 'react';
import {
  Text,
  View,
  Navigator,
  TouchableHighlight
} from 'react-native';
import Login from "./Login";

export default class Welcome extends Component {
   
 
  constructor(props){
        super(props);
        this.state = {};
    }

  _onPress(){
       let navigator = this.props.navigator;
        Alert.alert('Button has been pressed!'+navigator);
        if (navigator) {
          navigator.push({
                name:'Login',
                component:Login
        });
        }
    }
  render() {
     return (
            <View>
              <TouchableHighlight  onPress={this._onPress.bind(this)}>   

              <TouchableHighlight  onPress={this._onPress}>   

<Text >此為歡迎頁面 點選進入登入頁面</Text> </TouchableHighlight> </View> ); }}

紅色的代替藍色的就可以解決此問題了