在react本机中的用户角色智能抽屉导航

Question

我在我的应用程序中添加了用于实现抽屉导航的react-navigation-drawer。我创建了一个名为PrimaryNav.js的文件，并在其中添加了所有导航代码.

import Login from './components/Login';
import Employee from './pages/Employee';
import { createAppContainer,SafeAreaView, } from 'react-navigation'
import { createDrawerNavigator, DrawerItems } from 'react-navigation-drawer';
import React from 'react';

const Primary_Nav = createDrawerNavigator({
    Login: {
      screen: Login,
      navigationOptions: {
        drawerLabel: () => null
      }
    },
    Home_kitchen: {
      screen: Home_kitchen,
      navigationOptions: {
        drawerLabel: "Home"
      }
    },
    Employee: {
      screen: Employee,
      navigationOptions:{
        drawerLabel:"Employee",
      }
    },
  },{
    initialRouteName:'Login',
    drawerPosition: 'left',
    drawerType: "slide",
    }
});

const PrimaryNav = createAppContainer(Primary_Nav);
export default PrimaryNav;

就像上面那样。我已经在App.js中调用了这个文件，我面临的问题是我需要根据用户的角色设置一个抽屉项目。因此，如果用户角色是出纳员，他不应该能够看到所有的菜单。

所有页面都正确地出现在抽屉菜单中，但问题是应该如何在我的应用程序中按角色管理菜单，并根据用户的角色更改菜单？。

Answer 1

嗨，我看到你的问题了，我想帮你。我为抽屉的部件做了一个定制的设计。-firstly --您可以为抽屉设计创建一个额外的文件，如DrawerComponent.js，并在您创建抽屉导航器的代码中导入

import DrawerComponent from "./DrawerComponent";

const Primary_Nav = createDrawerNavigator(
{
 Login: {
  screen: Login,
  navigationOptions: {
    drawerLabel: () => null
  }
},
Home_kitchen: {
  screen: Home_kitchen,
  navigationOptions: {
    drawerLabel: "Home"
  }
},
Employee: {
  screen: Employee,
  navigationOptions: {
    drawerLabel: "Employee"
  }
}
},
{
  initialRouteName: "Login",
  drawerPosition: "left",
  drawerType: "slide",
  contentComponent: DrawerComponent // i added this DrawerComponent
}
);

const PrimaryNav = createAppContainer(Primary_Nav);
export default PrimaryNav;

现在在DrawerComponent.js

import React, { Component } from "react";
import { Text, View, TouchableOpacity } from "react-native";

export default class DrawerComponent extends Component {
  constructor(props) {
    super(props);

    this.state = {
      role: 1 // i used 1 for cashier and 0 for chef
    };
  }

  render() {
    const { role } = this.state;
    const { navigation } = this.props;
    return (
      <View style={{ flex: 1, paddingVertical: 40, paddingHorizontal: 20 }}>
        <TouchableOpacity
          style={{ margin: 20 }}
          onPress={() => navigation.navigate("Home_kitchen")}
        >
          <Text>Home</Text>
        </TouchableOpacity>
        {role ? (
          <TouchableOpacity
            style={{ margin: 20 }}
            onPress={() => navigation.navigate("Employee")}
          >
            <Text>Employee</Text>
          </TouchableOpacity>
        ) : null}
      </View>
    );
  }
}

如果您将角色更改为0，则在抽屉导航器中禁用Employee选项卡，我让用户使用三元操作符作为条件。你可以随意修改。希望它对你有帮助。