[英]React native Undefined is not an object(evaluating'_react3.default.PropType.shape')?
[英]React native Undefined is not an object(evaluating'_react3.default.PropType.shape')
由于这种情况,我正在研究React-native,我想为IOS和Android创建导航,实际上,我遇到了一个错误
错误: React native Undefined不是对象(正在评估'_react3.default.PropType.shape')
我的开发环境
我遵循官方的本机本地教程
App.js
import React, { Component } from 'react';
import {Platform, StyleSheet, Text, View} from 'react-native';
import Navigator from 'react-native-deprecated-custom-components';
import MyScene from './src/components/navigation/MyScene';
const instructions = Platform.select({
ios: 'IOS: Press Cmd+R to reload,\n' +
'Cmd+D or shake for dev menu',
android: 'Android : Double tap R on your keyboard to reload,\n' +
'Shake or press menu button for dev menu',
});
export default class App extends Component {
render() {
return (
<Navigator initialRoute={{ title: 'My Initial Scene', index: 0 }}
renderScene={(route, navigator) =>
<MyScene
title={route.title}
// Function to call when a new scene should be displayed
onForward={() => {
const nextIndex = route.index + 1;
navigator.push({
title: 'Scene ' + nextIndex,
index: nextIndex,
});
}}
// Function to call to go back to the previous scene
onBack={() => {
if (route.index > 0) {
navigator.pop();
}
}}
/>
}
/>
)
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
welcome: {
fontSize: 50,
textAlign: 'center',
margin: 10,
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
},
});
MyScene.js
import React, { Component, PropTypes } from 'react';
import { View, Text, TouchableHighlight } from 'react-native';
export default class MyScene extends Component {
render() {
return (
<View>
<Text>Current Scene: {this.props.title}</Text>
<TouchableHighlight onPress={this.props.onForward}>
<Text>Tap me to load the next scene</Text>
</TouchableHighlight>
<TouchableHighlight onPress={this.props.onBack}>
<Text>Tap me to go back</Text>
</TouchableHighlight>
</View>
)
}
}
MyScene.propTypes = {
title: PropTypes.string.isRequired,
onForward: PropTypes.func.isRequired,
onBack: PropTypes.func.isRequired,
};
检查您的react版本,如果版本> 16,则propTypes在一个名为prop-types
的新包中
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