前言

有小夥伴留言有前進後退沒法聯動的問題.我仔細梳理下了.

簡化了程式碼邏輯和程式碼量,重寫了一遍,執行邏輯和上個版本有所差異;

上個版本 :React 折騰記 - (3) 結合Mobx實現一個比較靠譜的動態tab水平選單,同時關聯側邊欄

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效果圖

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功能點

在上個版本的功能的基礎上梳理,剔除一些BUG,基本都會觸發聯動

• 重定向
• 關閉單一標籤/關閉其他標籤
• 動態追加標籤
• 瀏覽器的前進後退功能
• 同子域的,選單會保持展開

依賴 :antd/styled-components/mobx/mobx-react/react

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實現思路

• 把遍歷匹配的扔到狀態裡面去匹配,可以減少挺多程式碼量
• 從佈局容器觸發匹配(這樣初始化就能讓動態選單正常)
• 藉助getDerivedStateFromProps和getSnapshotBeforeUpdate這類React 16.3+的特性實現側邊欄聯動
• 動態選單隻操作mobx共享狀態

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程式碼

佈局快取活動路由的關鍵程式碼

    // 路由容器那個元件
    // 注入mobx狀態,這樣活動路由每次都能正確響應
    // 減少一些不必要的渲染,update需要做一些判斷..同樣的路由不作處理
    componentDidMount = () => {
        this.props.rstat.searchRoute(location.pathname);
    };

    componentDidUpdate(prevProps, prevState) {
        if (
            this.props.rstat.activeRoute.pathname !==
            this.props.location.pathname
        ) {
            this.props.rstat.searchRoute(this.props.location.pathname);
        }
    }

複製程式碼

側邊欄(Sidebar.js)

import React, { Component } from 'react';
import { withRouter } from 'react-router-dom';
import { observer, inject } from 'mobx-react';

// antd
import { Layout, Menu, Icon } from 'antd';
const { Sider } = Layout;
const { SubMenu, Item } = Menu;
import RouterTree, { groupKey } from 'router';

// Logo元件
import Logo from 'pages/Layout/Logo';

@inject('rstat')
@withRouter
@observer
class Sidebar extends Component {
    constructor(props) {
        super(props);

        this.state = {
            openKeys: [''],
            selectedKeys: [''],
            rootSubmenuKeys: groupKey
        };
    }

    static getDerivedStateFromProps(nextProps, prevState) {
        const { groupKey, childKey } = nextProps.rstat.activeRoute;
        if (
            !prevState.openKeys[0] ||
            (groupKey !== prevState.openKeys[0] &&
                childKey !== prevState.selectedKeys[0])
        ) {
            return {
                openKeys: [groupKey],
                selectedKeys: [childKey]
            };
        }

        return null;
    }

    getSnapshotBeforeUpdate(prevProps, prevState) {
        const { openKeys, selectedKeys } = prevState;
        const { groupKey, childKey } = prevProps.rstat.activeRoute;
        if (openKeys[0] !== groupKey || selectedKeys[0] !== childKey) {
            return {
                openKeys: [groupKey],
                selectedKeys: [childKey]
            };
        }

        return null;
    }

    componentDidUpdate = (prevProps, prevState, snapshot) => {
        if (snapshot) {
            this.setState(snapshot);
        }
    };

    OpenChange = openKeys => {
        const latestOpenKey = openKeys.find(
            key => this.state.openKeys.indexOf(key) === -1
        );
        if (this.state.rootSubmenuKeys.indexOf(latestOpenKey) === -1) {
            this.setState({ openKeys });
        } else {
            this.setState({
                openKeys: latestOpenKey ? [latestOpenKey] : [...openKeys]
            });
        }
    };

    // 路由跳轉
    gotoUrl = itemurl => {
        const { history, location } = this.props;
        if (location.pathname === itemurl) {
            return;
        } else {
            this.props.rstat.searchRoute(itemurl)
            history.push(itemurl);
        }
    };

    render() {
        const { openKeys, selectedKeys } = this.state;
        const { collapsed, onCollapse, rstat, history } = this.props;
        const SiderTree = RouterTree.map(item => (
            <SubMenu
                key={item.key}
                title={
                    <span>
                        <Icon type={item.title.icon} />
                        <span>{item.title.text}</span>
                    </span>
                }>
                {item.children &&
                    item.children.map(menuItem => (
                        <Item
                            key={menuItem.key}
                            onClick={() => this.gotoUrl(menuItem.path)}>
                            {menuItem.text}
                        </Item>
                    ))}
            </SubMenu>
        ));
        return (
            <Sider
                collapsible
                breakpoint="lg"
                collapsed={collapsed}
                onCollapse={onCollapse}
                trigger={collapsed}>
                <Logo collapsed={collapsed} />
                <Menu
                    subMenuOpenDelay={0.3}
                    theme="dark"
                    openKeys={openKeys}
                    selectedKeys={selectedKeys}
                    mode="inline"
                    onOpenChange={this.OpenChange}>
                    {SiderTree}
                </Menu>
            </Sider>
        );
    }
}

export default Sidebar;


複製程式碼

Mobx Model(聯動共享狀態)

import { observable, action, computed, toJS } from 'mobx';
import RouterTree from 'router'; // 這個是自己維護的靜態路由表

function findObj(array, obj) {
    for (let i = 0, j = array.length; i < j; i++) {
        if (array[i].childKey === obj.childKey) {
            return true;
        }
    }
    return false;
}

class RouterStateModel {
    @observable
    currentRouteInfo; // 當前訪問的資訊
    @observable
    routerCollection; // 訪問過的路由資訊

    constructor() {
        this.currentRouteInfo = {};
        this.routerCollection = [];
    }

    // 當前訪問的資訊
    @action
    addRoute = values => {
        // 賦值
        this.currentRouteInfo = values;
        // 若是陣列為0
        if (this.routerCollection.length === 0) {
            // 則追加到陣列中
            this.routerCollection.push(this.currentRouteInfo);
        } else {
            findObj(this.routerCollection, values)
                ? null
                : this.routerCollection.push(this.currentRouteInfo);
        }
    };

    // 設定index為高亮路由
    @action
    setIndex = index => {
        this.currentRouteInfo = this.routerCollection[index];
    };

    // 查詢路由匹配
    @action
    searchRoute(path) {
        RouterTree.map(item => {
            if (item.pathname) {
                // 做一些事情,這裡只有二級選單
            }
            // 因為選單隻有二級,簡單的做個遍歷就可以了
            if (item.children && item.children.length > 0) {
                item.children.map(childitem => {
                    // 為什麼要用match是因為 url有可能帶引數等,全等就不可以了
                    // 若是match不到會返回null
                    if (path.match(childitem.path)) {
                        // 設定title
                        document.title = childitem.text;

                        this.addRoute({
                            groupKey: item.key,
                            childKey: childitem.key,
                            childText: childitem.text,
                            pathname: childitem.path
                        });
                    }
                });
            }
        });
    }

    // 關閉單一路由
    @action
    closeCurrentTag = index => {
        this.routerCollection.splice(index, 1);
        this.currentRouteInfo = this.routerCollection[
            this.routerCollection.length - 1
        ];
    };

    // 關閉除了當前url的其他所有路由
    @action
    closeOtherTag = route => {
        if (this.routerCollection.length > 1) {
            this.routerCollection = [this.currentRouteInfo];
        } else {
            return false;
        }
    };

    // 獲取當前啟用的item,也就是訪問的路由資訊
    @computed
    get activeRoute() {
        return toJS(this.currentRouteInfo);
    }

    // 獲取當前的訪問歷史集合
    @computed
    get historyCollection() {
        return toJS(this.routerCollection);
    }
}

const RouterState = new RouterStateModel();

export default RouterState;


複製程式碼

靜態路由表(router/index.js)

import asyncComponent from 'components/asyncComponent/asyncComponent';

// 資料分析
const Monitor = asyncComponent(() => import('pages/DashBoard/Monitor'));
const Analyze = asyncComponent(() => import('pages/DashBoard/Analyze'));

// 音訊管理
const VoiceList = asyncComponent(() => import('pages/AudioManage/VoiceList'));
const CallVoice = asyncComponent(() => import('pages/AudioManage/CallVoice'));
const PrivateChat = asyncComponent(() =>
    import('pages/AudioManage/PrivateChat')
);
const Topic = asyncComponent(() => import('pages/AudioManage/Topic'));

// 活動中心
const ActiveList = asyncComponent(() =>
    import('pages/ActivityCenter/ActiveList')
);

// APP 管理
const USERLIST = asyncComponent(() => import('pages/AppManage/UserList'));
const ApkSetting = asyncComponent(() => import('pages/AppManage/ApkSetting'));
const LicenseList = asyncComponent(() => import('pages/AppManage/LicenseList'));
const QaList = asyncComponent(() => import('pages/AppManage/QaList'));

// 安全中心
const REPORT = asyncComponent(() => import('pages/Safety/Report'));
const BroadCast = asyncComponent(() => import('pages/Safety/BroadCast'));

// 電影頻道
const MovieList = asyncComponent(() => import('pages/Movie/MovieList'));

// 後臺管理
const UserSetting = asyncComponent(() =>
    import('pages/AdminSetting/UserSetting')
);

const RouterTree = [
    {
        key: 'g0',
        title: {
            icon: 'dashboard',
            text: '資料分析'
        },
        exact: true,
        path: '/dashboard',
        children: [
            {
                key: '1',
                text: '資料監控',
                path: '/dashboard/monitor',
                component: Monitor
            },
            {
                key: '2',
                text: '資料分析',
                path: '/dashboard/analyze',
                component: Analyze
            }
        ]
    },
    {
        key: 'g1',
        title: {
            icon: 'play-circle',
            text: '音訊管理'
        },
        exact: true,
        path: '/voice',
        children: [
            {
                key: '8',
                text: '聲兮列表',
                path: '/voice/sxlist',
                component: VoiceList
            },
            {
                key: '9',
                text: '回聲列表',
                path: '/voice/calllist',
                component: CallVoice
            },
            {
                key: '10',
                text: '私聊列表',
                path: '/voice/privatechat',
                component: PrivateChat
            }
            // {
            //     key: '11',
            //     text: '熱門話題',
            //     path: '/voice/topcis',
            //     component: Topic
            // }
        ]
    },
    {
        key: 'g2',
        title: {
            icon: 'schedule',
            text: '活動中心'
        },
        exact: true,
        path: '/active',
        children: [
            {
                key: '17',
                text: '活動列表',
                path: '/active/list',
                component: ActiveList
            }
        ]
    },
    {
        key: 'g3',
        title: {
            icon: 'scan',
            text: '電影專欄'
        },
        exact: true,
        path: '/active',
        children: [
            {
                key: '22',
                text: '電影大全',
                path: '/movie/list',
                component: MovieList
            }
        ]
    },
    {
        key: 'g4',
        title: {
            icon: 'apple-o',
            text: 'APP管理'
        },
        exact: true,
        path: '/appmanage',
        children: [
            {
                key: '29',
                text: 'Apk設定',
                path: '/appmanage/apksetting',
                component: ApkSetting
            },
            {
                key: '30',
                text: '使用者列表',
                path: '/appmanage/userlist',
                component: USERLIST
            },
            {
                key: '31',
                text: '使用者協議',
                path: '/platform/license',
                component: LicenseList
            },
            {
                key: '32',
                text: '幫助中心',
                path: '/platform/help',
                component: QaList
            }
        ]
    },
    {
        key: 'g5',
        title: {
            icon: 'safety',
            text: '安全中心'
        },
        exact: true,
        path: '/safety',
        children: [
            {
                key: '36',
                text: '舉報處理',
                path: '/safety/report',
                component: REPORT
            },
            {
                key: '37',
                text: '廣播中心',
                path: '/safety/broadcast',
                component: BroadCast
            }
        ]
    },
    {
        key: 'g6',
        title: {
            icon: 'user',
            text: '後臺設定'
        },
        exact: true,
        path: '/user',
        children: [
            {
                key: '43',
                text: '個人設定',
                path: '/admin/setting',
                component: UserSetting
            }
        ]
    }
];

export const groupKey = RouterTree.map(item => item.key);

export default RouterTree;


複製程式碼

動態選單

DynamicTabMenu.js

import React, { Component } from 'react';
import styled from 'styled-components';
import { withRouter } from 'react-router-dom';
import { observer, inject } from 'mobx-react';
import { Button, Popover } from 'antd';

import TagList from './TagList';

const DynamicTabMenuCSS = styled.div`
    box-shadow: 0px 1px 1px -1px rgba(0, 0, 0, 0.2),
        0px 1px 1px 0px rgba(0, 0, 0, 0.14), 0px 1px 3px 0px rgba(0, 0, 0, 0.12);
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    background-color: #fff;
    .tag-menu {
        flex: 1;
    }
    .operator {
        padding: 0 15px;
        flex-shrink: 1;
    }
`;

@inject('rstat')
@withRouter
@observer
class DynamicTabMenu extends Component {
    constructor(props) {
        super(props);
        this.state = {
            closeTagIcon: false // 控制關閉所有標籤的狀態
        };
    }

    // 關閉其他標籤
    closeOtherTagFunc = () => {
        this.props.rstat.closeOtherTag();
    };

    render() {
        return (
            <DynamicTabMenuCSS>
                <div className="tag-menu">
                    <TagList />
                </div>
                <div
                    className="operator"
                    onClick={this.closeOtherTagFunc}
                    onMouseEnter={() => {
                        this.setState({
                            closeTagIcon: true
                        });
                    }}
                    onMouseLeave={() => {
                        this.setState({
                            closeTagIcon: false
                        });
                    }}>
                    <Popover
                        placement="bottom"
                        title="關閉標籤"
                        content={'只會保留當前訪問的標籤'}
                        trigger="hover">
                        <Button type="dashed" shape="circle" icon="close" />
                    </Popover>
                </div>
            </DynamicTabMenuCSS>
        );
    }
}

export default DynamicTabMenu;


複製程式碼

TagList.js

import React, { Component } from 'react';
import { withRouter } from 'react-router-dom';
import { observer, inject } from 'mobx-react';
import { Icon, Menu } from 'antd';

@inject('rstat')
@withRouter
@observer
class TagList extends Component {
    constructor(props) {
        super(props);
        this.state = {
            showCloseIcon: false, //  控制自身關閉icon
            currentIndex: '' // 當前的索引
        };
    }

    render() {
        const { rstat, history, location } = this.props;
        const { showCloseIcon, currentIndex } = this.state;
        return (
            <Menu selectedKeys={[rstat.activeRoute.childKey]} mode="horizontal">
                {rstat.historyCollection &&
                    rstat.historyCollection.map((tag, index) => (
                        <Menu.Item
                            key={tag.childKey}
                            onMouseEnter={() => {
                                this.setState({
                                    showCloseIcon: true,
                                    currentIndex: tag.childKey
                                });
                            }}
                            onMouseLeave={() => {
                                this.setState({
                                    showCloseIcon: false
                                });
                            }}
                            onClick={() => {
                                if (tag.pathname === location.pathname) {
                                    return;
                                } else {
                                    rstat.setIndex(index)
                                    history.push(tag.pathname);
                                }
                            }}>
                            <span>
                                <Icon
                                    type="tag-o"
                                    style={{ padding: '0 0 0 10px' }}
                                />
                                {tag.childText}
                            </span>

                            {showCloseIcon &&
                            rstat.historyCollection.length > 1 &&
                            currentIndex === tag.childKey ? (
                                <Icon
                                    type="close-circle"
                                    style={{
                                        position: 'absolute',
                                        top: 0,
                                        right: -20,
                                        fontSize: 24
                                    }}
                                    onClick={event => {
                                        event.stopPropagation();
                                        rstat.closeCurrentTag(index);
                                        history.push(
                                            rstat.activeRoute.pathname
                                        );
                                    }}
                                />
                            ) : null}
                        </Menu.Item>
                    ))}
            </Menu>
        );
    }
}

export default TagList;


複製程式碼

---

總結

mobx總體用下來,只能說還好;

還是有些不是很人性化的, 狀態內很難結合react-router 4進行跳轉

雖然還有一些什麼mobx-router這類可以整合自定義瀏覽歷史物件,不想用

所以跳轉都是從外部觸發了..