android - 路由 'EnableNotification' 应该声明一个屏幕

Question

我正在研究 react-native 并尝试集成 react-navigation https://reactnavigation.org/docs/intro/用于导航。我在实现过程中遇到了一些困难。

index.android.js

**
 * https://github.com/facebook/react-native
 * @flow
 */

import React, { Component } from "react";
import {
  AppRegistry,
  Image,
  View,
  Text,
  Button,
  StyleSheet
} from "react-native";
import { StackNavigator } from "react-navigation";
import EnableNotificationScreen from "./EnableNotification";

class SplashScreen extends Component {
  render() {
    console.disableYellowBox = true;
    const { navigate } = this.props.navigation;
    return (
      <View style={styles.container}>
        <Image source={require("./img/talk_people.png")} />
        <Text style={{ fontSize: 22, textAlign: "center" }}>
          Never forget to stay in touch with the people that matter to you.
        </Text>
        <View style={{ width: 240, marginTop: 30 }}>
          <Button
            title="CONTINUE"
            color="#FE434C"
            onPress={() => navigate("EnableNotification")}
          />
        </View>
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    backgroundColor: "#FFFFFF",
    alignItems: "center",
    justifyContent: "center",
    padding: 16,
    flex: 1,
    flexDirection: "column"
  }
});

const ScheduledApp = StackNavigator(
  {
    Splash: { screen: SplashScreen },
    EnableNotification: { screen: EnableNotificationScreen }
  },
  {
    initialRouteName: "Splash"
  }
);

AppRegistry.registerComponent("Scheduled", () => ScheduledApp);

启用通知.js

/**
 * https://github.com/facebook/react-native
 * @flow
 */

import React, { Component } from "react";
import { View, Text } from "react-native";

export class EnableNotification extends Component {
  render() {
    return <View><Text>Enable Notification</Text></View>;
  }
}

Answer 1

在您的 EnableNotification.js 中，您在没有默认情况下导出您的 EnableNotification 类(这是命名导出)。

然后您在 index.android.js 中使用 import EnableNotificationScreen from "./EnableNotification" 导入它，这导致了错误。

你应该

a) 导出默认的 EnableNotification 屏幕即 export default class EnableNotification extends Component 或

b) 更改为 import { EnableNotification } from "./EnableNotification"

阅读更多关于导出类型的信息 here