react-native 中的用户角色明智的抽屉导航

Question

我添加了 react-navigation-drawer 用于在我的应用中实现抽屉导航。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;

类似上面的东西。我在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，如果用户角色是收银员，他应该无法看到所有菜单。

抽屉菜单中的所有页面都正常显示，但问题是我应该如何在我的应用程序中明智地管理菜单角色并根据用户的角色更改菜单？ p>

Answer 1

您好，我看到了您的问题，正在努力帮助您。 我已经为抽屉组件进行了定制设计。 -首先您可以为抽屉设计创建一个额外的文件，例如DrawerComponent.js 并在您要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 Drawer Navigator 中禁用 Employee 选项卡我让用户使用 三元运算符 来获取条件。您可以根据需要进行修改。希望对你有所帮助。