如何将自定义抽屉项目动态设置为 "focused"？

Question

我的最终目标是根据其他地方设置的一些状态为一些抽屉项目提供自定义背景颜色。我知道为了给抽屉项目提供独特的背景颜色，我需要设置自定义抽屉内容。但是，我遇到了一个问题，我无法让自定义抽屉图标知道它们是否处于焦点。

我原本以为我可以做一个 const [bHomeFocused, setbHomeFocused] = useState(false)（等）并在 onPress 上设置状态，然后在上面设置 focused 属性，但是当更多的抽屉物品进来了，我认为这听起来像是一个笨拙的解决方案。

我确定我遗漏了一个简单的答案，因为非自定义 DrawerItems 本身就具有此功能...

import { Drawer } from 'react-native-paper'
import { createDrawerNavigator, DrawerNavigationProp, DrawerItem, DrawerContentScrollView, DrawerItemList, DrawerContentComponentProps, DrawerContentOptions } from '@react-navigation/drawer';

function CustomDrawerContent(props: DrawerContentComponentProps<DrawerContentOptions>) {

    return (
        <DrawerContentScrollView {...props}>
            <Drawer.Section>
                <DrawerItem
                    label="Dashboard"
                    labelStyle={{ color: colorTheme.normalText }}
                    icon={() => <Icon name="book" type="feather" size={26} color={colorTheme.normalText} />}
                    activeBackgroundColor={colorTheme.panel}
                    inactiveBackgroundColor={colorTheme.cyan}
                    onPress={() => {
                        props.navigation.navigate('Dashboard')
                    }}
                />
            </Drawer.Section>
            <DrawerItem
                label="Home"
                labelStyle={{ color: colorTheme.normalText }}
                icon={() => <Icon name="home" type="feather" size={26} color={colorTheme.normalText} />}
                activeBackgroundColor={colorTheme.panel}
                inactiveBackgroundColor={colorTheme.red}
                onPress={() => {
                    props.navigation.navigate('HomeStack')
                }}
            />
        </DrawerContentScrollView>
    );
}

export type DrawerParamList = {
    Dashboard: undefined;
    HomeStack: undefined;
};

export type DrawerProps<T extends keyof DrawerParamList> = {
    navigation: DrawerNavigationProp<DrawerParamList, T>;
    route: RouteProp<DrawerParamList, T>;
};

const AppDrawer = createDrawerNavigator<DrawerParamList>();

export default function MainDrawer({ route, navigation }: TopLevelStackProps<"MainDrawer">) {

    return (
        <AppDrawer.Navigator
            drawerStyle={globalStyles.drawer}
            drawerContent={
                (props) => <CustomDrawerContent {...props} />
            }
            drawerContentOptions={{
                labelStyle: { color: colorTheme.normalText },
                activeBackgroundColor: colorTheme.panel,
                inactiveBackgroundColor: colorTheme.background,
            }}
        >
            <AppDrawer.Screen
                name="Dashboard"
                component={Dashboard}
                options={{
                    unmountOnBlur: true,
                }}
            />
            <AppDrawer.Screen
                name="HomeStack"
                component={HomeStack}
                options={{
                    unmountOnBlur: true,
                }}
            />
        </AppDrawer.Navigator>
    );
}

Answer 1

没有 focused 属性可以用来获取当前聚焦的路线。

而是使用 DrawerNavigator 组件接收的道具。查看 this doc。

如果您看到传递给 drawerContent 组件的道具列表，您可以看到 state 道具。来自文档，

state - The navigation state of the navigator, state.routes contains list of all routes

所以你可以获得路由数组和当前索引，它指示当前聚焦的屏幕。您可以获得 route name 并将其与列表中的项目名称进行比较。

const {state} = props
const {routes, index} = state; //Not sure about the name of index property. Do check it out by logging the 'state' variable.
const focusedRoute = routes[index];

如何将自定义抽屉项目动态设置为 "focused"？

How do I set custom drawer items to "focused" dynamically?

typescript

react-native

react-navigation

react-native-paper