如何在本机博览会中深入链接到特定屏幕

Question

我正在使用以下代码创建链接URL：

Linking.makeUrl('lobby/', {
  roomId: params.roomId
})

输出以下内容：exp://192.168.0.31:19000/--/lobby/?roomId=1585512451

此方法在本地运行良好，但似乎只能打开我的应用程序的主页。

我已经在My app.js中定义了屏幕

const Stack = createStackNavigator();

function App() {  
  return (
    <NavigationContainer>
      <Stack.Navigator>
        <Stack.Screen 
          name="Home" 
          component={HomeScreen} 
        />
        <Stack.Screen 
          name="Lobby"
          component={LobbyScreen} 
        />
      </Stack.Navigator>
    </NavigationContainer>
  );
}

我是否需要使用某种甚至侦听器重定向到大厅屏幕，还是应该将传递到makeUrl的路径映射到屏幕？

Answer 1

是的，您需要监听url事件。请参阅Expo文档中有关深层链接的部分。 https://docs.expo.io/versions/latest/workflow/linking/#handling-links-into-your-app

引自提供的链接

Handling links into your app
There are two ways to handle URLs that open your app.

1. If the app is already open, the app is foregrounded and a Linking event is fired
You can handle these events with Linking.addEventListener('url', callback).

2. If the app is not already open, it is opened and the url is passed in as the initialURL
You can handle these events with Linking.getInitialURL -- it returns a Promise that resolves to the url, if there is one.

从他们的示例代码：

let redirectUrl = Linking.makeUrl('path/into/app', { hello: 'world', goodbye: 'now' });

然后您需要使用事件处理程序处理URL

_handleUrl = url => {
  this.setState({ url });
  let { path, queryParams } = Linking.parse(url);
  alert(`Linked to app with path: ${path} and data: ${JSON.stringify(queryParams)}`);
};

---

由于打开应用程序并单击链接而关闭应用程序时的行为不同，因此需要2个不同的入口点来处理链接。

在HomeScreen组件内部，您可以放置​​以下内容：

    componentDidMount() {
        // handle an initial url on app opening
        Linking.getInitialURL().then(urlRedirect)
    }

在您应用程序中的某个地方，也许在app.js中，从应用程序内部放置了用于处理新网址的处理程序。

function urlRedirect(url) {
    if(!url) return;
    // parse and redirect to new url
    let { path, queryParams } = Linking.parse(url);
    console.log(`Linked to app with path: ${path} and data: ${JSON.stringify(queryParams)}`);
    this.navigation.replace(path, queryParams);
}

// listen for new url events coming from Expo
Linking.addEventListener('url', event => {
    urlRedirect(event.url);
});