React-native:返回到堆栈中的特定屏幕

Sal*_*.O. 5 react-native react-navigation

这是根导航器

export const AppNavigator = StackNavigator({
        Splash: { screen: Splash },
        Dashboard: { screen: DashboardDrawer }
    });

const DashboardDrawer = DrawerNavigator({ DashboardScreen: {
        screen: StackNavigator({
            A: { screen: A },
            B: { screen: B },
            C: { screen: C },
            D: { screen: D },
        }
    }, {
        contentComponent: DashboardDrawerComponent,
        drawerWidth: 280
    });
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我的堆栈中有 4 个屏幕 - A、B、C、D。我想从 D 跳到 A。(或 D 跳到任何屏幕)我参考了以下 react-navigation 文档- https://reactnavigation.org/docs/navigators/navigation-prop#goBack-Close-the-active-屏幕后移

上面的文档。指出要从屏幕 D 转到屏幕 A(弹出 D、C 和 B),您需要提供一个键来返回从,在我的情况下为 B,如下所示

navigation.goBack(SCREEN_KEY_B)
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所以,我的问题是我应该从哪里获得特定屏幕的密钥? 我检查了我的根导航对象,它向我显示了每个屏幕的一些动态生成的键。如何为屏幕指定我自己的键?

Sal*_*.O. 2

这很棘手!

我参考了react-navigation文档的这一段,并且已经实现了上面的功能! https://reactnavigation.org/docs/routers/#Custom-Navigation-Actions

就是这样,

1.稍微改变了问题中我的DrawerNavigator(以适应以下stacknavigator)

const DrawerStackNavigator = new StackNavigator({
        A: { screen: A },
        B: { screen: B },
        C: { screen: C },
        D: { screen: D },
    }
});

const DashboardDrawer = DrawerNavigator({
        DashboardScreen: DrawerStackNavigator,
}, { 
       contentComponent: DashboardDrawerComponent,
       drawerWidth: 280
});
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2.在屏幕 D 中调度一个动作

const {navigation} = this.props;
navigation.dispatch({
    routeName: 'A',
    type: 'GoToRoute',
});
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3.在我的堆栈导航器上听这个动作

const defaultGetStateForAction = DrawerStackNavigator.router.getStateForAction;
DrawerStackNavigator.router.getStateForAction = (action, state) => {            
    if (state && action.type === 'GoToRoute') {           
        let index = state.routes.findIndex((item) => {
            return item.routeName === action.routeName
        });
        const routes = state.routes.slice(0, index+1);
        return {
            routes,
            index
        };    
    }       
    return defaultGetStateForAction(action, state);
};
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