当Internet中断时,我需要在每个屏幕上显示NetAlert模态。我已经为此创建了一个NetAlertModal组件。我不确定在哪里渲染该组件。我正在使用React Navigation Switch导航器。如果我按如下所示进行渲染,则不会显示登录屏幕。
我是新来的本地人,所以请帮助。
下面是我的代码
/***App.js*/
render() {
return (
<Provider store={store}>
<PersistGate>
<Fragment>
<StatusBar barStyle="dark-content" />
<SafeAreaView
style={styles.safeArea}
forceInset={{bottom: 'never', top: 'never'}}>
<NetAlertModal /> <------ Need to show this
<RootNav
ref={navigatorRef => {
NavigationService.setTopLevelNavigator(navigatorRef);
}}
/>
</SafeAreaView>
</Fragment>
</PersistGate>
</Provider>
);
}
}
/*rootNav.js*/
const RootNav = createSwitchNavigator(
{
Drawer: DrawerNavigator,
Auth: AuthStack,
},
{
initialRouteName: 'Auth',
},
);
export default createAppContainer(RootNav);
*/AuthStack.js*/
import {createStackNavigator} from 'react-navigation';
import Login from '../components/login/Login';
import Verify from '../components/verify/Verify';
const rootConfiguration = {
loginPage: {screen: Login},
verifyPage: {screen: Verify},
};
const stackNavigatorConfiguration = {
initialRouteName: 'loginPage',
headerMode: 'none',
defaultNavigationOptions: {
headerTintColor: '#ffeb3b',
headerTitleStyle: {
fontWeight: 'bold',
flex: 1,
textAlign: 'center',
},
},
};
export const AuthStack = createStackNavigator(
rootConfiguration,
stackNavigatorConfiguration,
);
import { NetInfo } from 'react-native';
NetInfo.isConnected.fetch().then(isConnected => {
if(isConnected)
{
console.log('Internet is connected');
}
})
将以上代码用作HOC或将其全局设置为您的根文件
[尝试使用我在@react-native-community/netinfo
库中创建的app.js中的以下示例
import React, { Component } from 'react';
import NetInfo from "@react-native-community/netinfo";
import { View, Text, Modal } from 'react-native';
class App extends Component {
constructor(props) {
super(props);
this.state = {
isConnected: true,
};
}
componentDidMount() {
NetInfo.isConnected.addEventListener('connectionChange', this.handleConnectivityChange);
}
componentWillUnmount() {
NetInfo.isConnected.removeEventListener('connectionChange', this.handleConnectivityChange);
}
handleConnectivityChange = isConnected => {
this.setState({ isConnected });
};
render() {
return (
<View style={{ flex: 1 }}>
<View style={{ flex: 1 }}>
{/* your app */}
</View>
{
!this.state.isConnected &&
<Modal
visible={!this.state.isConnected}
transparent={true}
animationType='slide'
>
<View style={styles.modelStyle}>
<View style={styles.modelWrapperStyle}>
<Text style={{ textAlign: 'center' }}>{global.strings.oops}</Text>
<Text style={{ textAlign: 'center' }}>{global.strings.internetConnection}</Text>
</View>
</View>
</Modal>
}
</View>
);
}
}
const styles = {
modelStyle: {
flex: 1,
alignItems: 'center',
justifyContent: 'center',
backgroundColor: 'rgba(0, 0, 0, 0.5)'
},
modelWrapperStyle: {
alignItems: 'center',
justifyContent: 'center',
backgroundColor: '#e3dfde',
padding: 20,
width: '90%',
borderRadius: 20
},
};
export default App;
根据您的要求进行更改。随时提出疑问。