我创建了一个简单的Android应用,可以在按下文本时更改导航。该应用程序运行正常,但当我触摸文本时,内容不会更改,也没有观察到导航。您可以查看错误here。我还提供了代码:
import React, { Component, PropTypes } from 'react';
import { Navigator, Text, TouchableHighlight, View, AppRegistry} from
'react-native';
export default class SimpleNavigationApp extends Component {
constructor(props){
super(props);
this.state={
title: 'My Initial Scene',
}
}
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();
}
}}
/>
}
/>
)
}
}
class dhrumil extends Component {
static propTypes = {
title: PropTypes.string.isRequired,
onForward: PropTypes.func.isRequired,
onBack: PropTypes.func.isRequired,
}
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>
)
}
}
AppRegistry.registerComponent("dhrumil",()=>dhrumil);
正如您在错误中看到的那样,在“我的当前场景:”文本后,标题也不会显示。我该如何解决这个问题?
答案 0 :(得分:0)
首先,永远不会调用您的导出默认类SimpleNavigationApp。
你应该将它放在另一个js文件中并将其导入dhrumil类
<强>第二下, 不再支持来自'react-native'的import {Navigator}。
阅读https://facebook.github.io/react-native/docs/navigation.html了解详细的导航文档。