我想花更多的时间在splash图片上

Question

我想花更多的时间在splash图像上我想设置启动图像的时间启动图像只出现1秒，然后白色屏幕。我希望第一个加载屏幕只显示为启动图像这是我的app,js文件。请在此处添加代码

*import React, { useRef, useState, useCallback, useEffect } from "react";
import { BackHandler, Platform, StyleSheet,ActivityIndicator } from "react-native";
import { WebView } from "react-native-webview";
export default function App() {
const webView = useRef();
const [canGoBack, setCanGoBack] = useState(false);
const handleBack = useCallback(() => {
if (canGoBack && webView.current) {
webView.current.goBack();
return true;
}
return false;`enter code here`
}, [canGoBack]);
useEffect(() => {
BackHandler.addEventListener("hardwareBackPress", handleBack);
return () => {
BackHandler.removeEventListener("hardwareBackPress", handleBack);
};
}, [handleBack]);
const App = () => (
<View style={[styles.container, styles.horizontal]}>
<ActivityIndicator />
<ActivityIndicator size="large" />
<ActivityIndicator size="small" color="#0000ff" />
<ActivityIndicator size="large" color="#00ff00" />
</View>
);
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
},
horizontal: {
flexDirection: 'row',
justifyContent: 'space-around',
padding: 10,
},
});
const platformStyles = StyleSheet.create({
webView: Platform.OS === 'ios' 
? { marginTop: 30, marginBottom: 40 }
: { marginTop: 30 }
});

return (
<WebView
ref={webView}
source={{ uri: "https://www.talesrunnerbestguild.co.kr/" }}
style = {platformStyles.webView}
onLoadProgress={(event) => setCanGoBack(event.nativeEvent.canGoBack)}
/>
);
}*

Answer 1

我已经为你修复了这个代码!

import React, { useRef, useState, useCallback, useEffect } from 'react';
import {
View,
BackHandler,
Platform,
StyleSheet,
ActivityIndicator,
} from 'react-native';
import { WebView } from 'react-native-webview';
const DELAY_BEFORE_WEBVIEW = 10; // <--- seconds before webview load
export default function App() {
// ref
const webView = useRef();
// callbacks
const handleBack = useCallback(() => {
if (canGoBack && webView.current) {
webView.current.goBack();
return true;
}
return false;
`enter code here`;
}, [canGoBack]);
// effects
useEffect(() => {
BackHandler.addEventListener('hardwareBackPress', handleBack);
return () => {
BackHandler.removeEventListener('hardwareBackPress', handleBack);
};
}, [handleBack]);
useEffect(() => {
setTimeout(() => {
setIsLoading(false);
}, 1000 * DELAY_BEFORE_WEBVIEW);
}, []);
// states
const [canGoBack, setCanGoBack] = useState(false);
const [isLoading, setIsLoading] = useState(true);
return (
<View style={styles.container}>
<WebView
ref={webView}
source={{ uri: 'https://www.talesrunnerbestguild.co.kr/' }}
style={styles.webView}
onLoadProgress={(event) => setCanGoBack(event.nativeEvent.canGoBack)}
/>
{isLoading && <CenterLoader />}
</View>
);
}
const CenterLoader = () => (
<View style={styles.loaderContainer}>
<ActivityIndicator size="large" color="#00ff00" />
</View>
);
const styles = StyleSheet.create({
container: { flex: 1 },
loaderContainer: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
position: 'absolute',
width: '100%',
height: '100%',
backgroundColor:'white' // <-- comment this to show webview while loading
},
webView:
Platform.OS === 'ios'
? { marginTop: 30, marginBottom: 40 }
: { marginTop: 30 },
});