[英]React Native - Deep linking is not working when app is not in background (Android, iOS)
[英]Deep linking not working when app is in background state React native
我正在創建基於 React native 的電子商務應用程序。這里我需要從 url shared 打開單個產品頁面。實際上,當應用程序處於終止狀態時它會工作,但如果應用程序處於后台/非活動狀態,它將無法工作。 在后台/非活動狀態下打開時,共享 url 為空。我附上了我的代碼。
// following code working for app killing state
componentWillMount() {
if (Platform.OS === 'android') {
console.log("Testing");debugger
//Constants.OneTimeFlag == false;
Linking.getInitialURL().then(url => {
console.log(url);
var str = url
var name = str.split('/')[4]
Constants.isLinking = true;
this.setState({ shop_Id: name})
if (str)
{
this.setState({ isFromHomeLinking:'FROM_LINK' })
this.props.navigation.navigate('SingleProductScreen', { ListViewClickItemHolder: [this.state.shop_Id,1,this.state.isFromHomeLinking] });
}
});
}
else {
Linking.addEventListener('url', this.handleNavigation);
}
}
Not working code following..
componentDidMount() {
AppState.addEventListener('change', this._handleAppStateChange);
}
componentWillUnmount() {
AppState.removeEventListener('change', this._handleAppStateChange);
}
this.state.appState declared in constructor(props)
_handleAppStateChange = (nextAppState) => {
if (this.state.appState.match(/inactive|background/) && nextAppState === 'active') {
console.log('App has come to the foreground!');debugger
if (Platform.OS === 'android') {
console.log("Testing");debugger
//Constants.OneTimeFlag == false;
Linking.getInitialURL().then(url => {
console.log(url);
var str = url
var name = str.split('/')[4]
Constants.isLinking = true;
this.setState({ shop_Id: name})
if (str)
{
this.setState({ isFromHomeLinking:'FROM_LINK' })
this.props.navigation.navigate('SingleProductScreen', { ListViewClickItemHolder: [this.state.shop_Id,1,this.state.isFromHomeLinking] });
}
});
}
else {
Linking.addEventListener('url', this.handleNavigation);
}
}
}
當我在后台狀態下從 whatsapp 和應用程序打開外部鏈接 Linking.getInitialURL() 接收為 null ..
以下我在清單文件中
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
android:windowSoftInputMode="adjustResize"
android:launchMode="singleTask">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http"
android:host="demo1.zgroo.com" />
</intent-filter>
</activity>
以下是我的示例網址..
請讓我知道任何解決方案..
提前致謝..
您需要為這種情況注冊鏈接偵聽器。
componentDidMount() {
Linking.addEventListener('url', this._handleOpenURL);
},
componentWillUnmount() {
Linking.removeEventListener('url', this._handleOpenURL);
},
_handleOpenURL(event) {
console.log(event.url);
}
這是使用鈎子的 Anurag 答案的一個版本:
export function useDeepLinkURL() {
const [linkedURL, setLinkedURL] = useState<string | null>(null);
// 1. 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(url) -- it returns a Promise that
// resolves to the url, if there is one.
useEffect(() => {
const getUrlAsync = async () => {
// Get the deep link used to open the app
const initialUrl = await Linking.getInitialURL();
setLinkedURL(decodeURI(initialUrl));
};
getUrlAsync();
}, []);
// 2. 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)
useEffect(() => {
const callback = ({url}: {url: string}) => setLinkedURL(decodeURI(url));
Linking.addEventListener('url', callback);
return () => {
Linking.removeEventListener('url', callback);
};
}, []);
const resetURL = () => setLinkedURL(null);
return {linkedURL, resetURL};
}
然后您可以將其用於:
const {linkedURL, resetURL} = useDeepLinkURL();
useEffect(() => {
// ... handle deep link
resetURL();
}, [linkedURL, resetURL])
我添加了函數resetURL
因為如果用戶與應用程序共享同一個文件兩次,你會想要加載它兩次。 但是,由於深層鏈接最終會相同,因此不會再次觸發useEffect
。 您可以通過將linkedURL
設置為null 來再次觸發它,因此下次共享文件時,您可以確定它會導致useEffect
運行。
此外,我使用decodeURI
對傳入的 URL 進行解碼,因為如果您使用像 react-native-fs 這樣的庫從指定路徑加載文件,它將無法處理名稱中帶有空格的文件,除非您使用decodeURI
.
從componentwillunmount
刪除偵聽器。 無需在componentwillunmount
編寫任何代碼,因為鏈接的addListener
將始終偵聽,只有當您從后台(通過單擊新的深層鏈接)進入活動狀態時才會觸發。
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