Question

我正在构建一个本机应用程序（App Image），它在Drawer Navigator上有Logout链接。

代码如下

 const DrawerScreen = DrawerNavigator({
    ..........
    logout: {
        screen: Component   
    },
})

export default DrawerScreen;

但问题是，它只是加载组件屏幕。我需要调用一个方法，我可以执行Asyncstorage清除并导航到LoginPage。

Answer 1

您可能想要在抽屉中添加一个按钮。如果是这样，您的代码将如下所示。

const Drawer = DrawerNavigator(
{
    mainpage:{screen:MyScreen}
},
{
    contentComponent:(props) => (
        <View style={{flex:1}}>
            <SafeAreaView forceInset={{ top: 'always', horizontal: 'never' }}>
                <DrawerItems {...props} />
                <Button title="Logout" onPress={DO_SOMETHING_HERE}/>
            </SafeAreaView>
        </View>
    ),
    drawerOpenRoute: 'DrawerOpen',
    drawerCloseRoute: 'DrawerClose',
    drawerToggleRoute: 'DrawerToggle'
})

您应该导入import {DrawerItems} from 'react-navigation';才能使其正常运行。

Answer 2

const DrawerNavigation = createDrawerNavigator(
  {
    Mainpage: {
      screen: Mainpage
    }
  },
  {
    contentComponent:(props) => (
      <View style={{flex:1}}>
          <SafeAreaView forceInset={{ top: 'always', horizontal: 'never' }}>
            <DrawerItems {...props} />
            <TouchableOpacity onPress={()=>
              Alert.alert(
                'Log out',
                'Do you want to logout?',
                [
                  {text: 'Cancel', onPress: () => {return null}},
                  {text: 'Confirm', onPress: () => {
                    AsyncStorage.clear();
                    props.navigation.navigate('Login')
                  }},
                ],
                { cancelable: false }
              )  
            }>
              <Text style={{margin: 16,fontWeight: 'bold',color: colors.textColor}}>Logout</Text>
            </TouchableOpacity>
          </SafeAreaView>
      </View>
    ),
    drawerOpenRoute: 'DrawerOpen',
    drawerCloseRoute: 'DrawerClose',
    drawerToggleRoute: 'DrawerToggle'
  }
);

Answer 3

您可以使用Component类执行Asyncstorage清除并导航登录页面。如果你使用react-navigation this.props有导航对象。

class YourComponent extends Component {
    constructor(props) {
        super(props);
     }

    componentWillMount() {
        Asyncstorage.clear();
        this.props.navigation.navigate('LoginPage')
    }
}
export default YourComponent;

Answer 4

您可以创建一个模式，为您执行此操作。点击退出 - ＆gt;使用可见属性显示模态并单击是然后关闭模态 - ＆gt;导航到登录屏幕。

Answer 5

使用AlertView兄弟会有所帮助，但在上面的示例中，如果你有一个标题而不是这个（this.props.navigation.navigate（＆＃39; LoginPage＆＃39;））

不会有任何意义

您的视图将加载到标题

下方

Answer 6

import {StyleSheet,AsyncStorage,Alert, View,SafeAreaView, Text, ActivityIndicator, Dimensions, TextInput,Image, TouchableOpacity, TouchableHighlight} from 'react-native';
import {DrawerItems,DrawerActions} from 'react-navigation-drawer';

 {
            contentComponent:(props) => (
              <View style={{flex:1}}>
                <SideMenu {...props}/>
                    <DrawerItems {...props} />
                    <TouchableOpacity onPress={()=>
                      Alert.alert(
                        'Log out',
                        'Do you want to logout?',
                        [
                          {text: 'Cancel', onPress: () => {this.props.navigation.dispatch(DrawerActions.closeDrawer()) }},
                          {text: 'Confirm', onPress: () => {
                            AsyncStorage.clear();
                            props.navigation.navigate('LoginScreen')
                          }},
                        ],
                        { cancelable: false }
                      )
                    }>
                      <Text style={{margin: 16,fontWeight: 'bold',color: 'red'}}>Logout</Text>
                    </TouchableOpacity>
              </View>
            ),
            drawerOpenRoute: 'DrawerOpen',
            drawerCloseRoute: 'DrawerClose',
            drawerToggleRoute: 'DrawerToggle'
    },

Answer 7

如果您要在第5版导航和功能组件中寻找答案，

MapView

如果您想在抽屉中隐藏一个选项，这也将为您提供帮助。

Answer 8

这是一种使用反应导航库在抽屉中实现注销的方法。

<Drawer.Screen
    name="Logout"
    component={<Any Dummy Component>}
    listeners={({ navigation }) => ({ 
        state: (e) => {
           if (e.data.state.index === 3) {
              // 3 is index of logout item in drawer

              navigation.replace("Login")
           }
        }
    })}
/>

使用react Native DrawerNavigator注销

8 个答案: