如何设置“react-native-drawer”在react-native中登录后仅对仪表板可见

在反应本机中，我想禁用抽屉Login并启用抽屉 在Dashboard屏幕。我已经实施了'react-native-drawer' with Navigator在路线之间导航。

渲染方法如下：

render() {
      <Drawer
                ref={(ref) => this._drawer = ref}
                disabled={!this.state.drawerEnabled}
                type="overlay"
                content={<Menu navigate={(route) => {
                    this._navigator.push(navigationHelper(route));
                    this._drawer.close()
                }}/>}
                tapToClose={true}
                openDrawerOffset={0.2}
                panCloseMask={0.2}
                closedDrawerOffset={-3}
                styles={{
                    drawer: {shadowColor: '#000000', shadowOpacity: 0.8, shadowRadius: 3},
                    main: {paddingLeft: 3}
                }}
                tweenHandler={(ratio) => ({
                    main: { opacity:(2-ratio)/2 }
                })}>
                <Navigator
                    ref={(ref) => this._navigator = ref}
                    configureScene={(route) => Navigator.SceneConfigs.FloatFromLeft}
                    initialRoute={{
                        id: 'Login',
                        title: 'Login',
                        index: 0
                    }}
                    renderScene={(route, navigator) => this._renderScene(route, navigator)}
                    navigationBar={
                        <Navigator.NavigationBar
                            style={styles.navBar}
                            routeMapper={NavigationBarRouteMapper} />
                    }
                />
            </Drawer>
      );
  }

renderScene如下来导航路线：

_renderScene(route, navigator) {
    navigator.navigate = self.navigate;
        switch (route.id) {
            case 'Login':
                return ( <Login navigator={navigator}/> );

            case 'Dashboard':
                    return ( <Dashboard navigator={navigator}/> );
        }
    }

我编写了一种在反应本机中启用和禁用抽屉的方法：

navigate(route, method){
        if(route)
        switch (route.id) {
            case 'Login':
            this.state = {drawerEnabled: false, navigationBarEnabled: false};
            break;

            case 'Dashboard':
            this.state = {drawerEnabled: true, navigationBarEnabled: true};
            break;
        }

          this.forceUpdate();
          this.refs.navigator[method](route);
      }
}

最初我在类和构造函数中设置了属性，调用了导航方法。

state = {drawerEnabled:true, navigationBarEnabled: true};

  constructor(){
    super();
    this.navigate = this.navigate.bind(this);
  }

那么这将是禁用抽屉的可能方法Login菜单并启用它Dashboard Screen.

你必须改变你的_renderScene()方法如下：

_renderScene(route, navigator) {
    navigator.navigate = this.navigate;
        switch (route.id) {
            case 'Login':
                return ( <Login navigator={navigator} {...route.passProps} /> );
            case 'Dashboard':
                return ( <Dashboard navigator={navigator} {...route.passProps} />);
        }
    }

没有必要navigate()方法，因此删除该方法。所有案例都必须根据您的需要和目的来编写default case你已将其设置为null。如果您正在设置null means left and right被禁用于Dashboard页面但仅title已启用Dashboard.

您需要编写代码left, right and title on toolbar如下：

const NavigationBarRouteMapper = {
    LeftButton(route, navigator, index, navState) {
        switch (route.id) {
            case 'Dashboard':
                return (
                    <TouchableOpacity
                        style={styles.navBarLeftButton}
                        onPress={() => {_emitter.emit('openMenu')}}>
                        <Icon name='menu' size={25} color={'white'} />
                    </TouchableOpacity>
                )
            default:
                return null   //For setting Dashboard left button null
        }
    },
    RightButton(route, navigator, index, navState) {
      switch (route.id) {
          case 'Dashboard':
            return (
            <TouchableOpacity
                style={styles.navBarRightButton} onPress={() => {route.onPress()}}>
                <Icon name={'map'} size={25} color={'white'} />
            </TouchableOpacity>
            )
            default:
              return null  //For setting Dashboard right button null
          }
    },
    Title(route, navigator, index, navState) {
        return (
            <Text style={[styles.navBarText, styles.navBarTitleText]}>
                {route.title}
            </Text>
        )
    }
}