转载：wepy框架入门

转载：https://www.jianshu.com/p/93d5a4b99777

安装 wepy 命令行工具。

npm install wepy-cli -g

在开发目录生成开发DEMO。

wepy new myproject

开发实时编译。

wepy build --watch

项目目录结构

    dist

    node_modules

    src

        components

            com_a.wpy

            com_b.wpy

        pages

            index.wpy

            page2.wpy

        app.wpy

    package.json

使用微信开发者工具新建项目，本地开发选择dist目录。
微信开发者工具 --> 项目 --> 关闭ES6转ES5。
本地项目根目录运行wepy build --watch，开启实时编译。

官方DEMO代码：

//index.js

//获取应用实例

var app = getApp()

Page({

  data: {

    motto: 'Hello World',

    userInfo: {}

  },

  //事件处理函数

  bindViewTap: function() {

    console.log('button clicked')

  },

  onLoad: function () {

    console.log('onLoad')

  }

})

基于wepy的实现：

import wepy from 'wepy';

export default class Index extends wepy.page {

    data = {

        motto: 'Hello World',

        userInfo: {}

    };

    methods = {

        bindViewTap () {

            console.log('button clicked');

        }

    };

    onLoad() {

        console.log('onLoad');

    };

}

wepy支持组件化开发
组件示例代码：

// index.wpy

<template>

    <view>

        <component id="pannel" path="pannel"></component>

        <component id="counter1" path="counter"></component>

        <component id="counter2" path="counter"></component>

        <component id="list" path="list"></component>

    </view>

</template>

<script>

import wepy from 'wepy';

import List from '../components/list';

import Panel from '../components/panel';

import Counter from '../components/counter';

export default class Index extends wepy.page {

    config = {

        "navigationBarTitleText": "test"

    };

    components = {

        panel: Panel,

        counter1: Counter,

        counter2: Counter,

        list: List

    };

}

</script>

官方DEMO：

project

    pages

        index

            index.json

            index.js

            index.wxml

            index.wxss

        log

            log.json

            log.wxml

            log.js

            log.wxss

    app.js

    app.json

    app.wxss

使用wepy框架后目录结构：

project

    src

        pages

            index.wpy

            log.wpy

        app.wpy

wepy默认使用babel编译，支持ES6 / 7的一些新特性

示例代码：

import wepy from 'wepy';

export default class Index extends wepy.page {

    getData() {

        return new Promise((resolve, reject) => {

            setTimeout(() => {

                resolve({data: });

            }, );

        });

    };

    async onLoad() {

        let data = await this.getData();

        console.log(data.data);

    };

}

原有代码：

onLoad = function () {

    var self = this;

    wx.login({

        success: function (data) {

            wx.getUserInfo({

                success: function (userinfo) {

                    self.setData({userInfo: userinfo});

                }

            });

        }

    });

}

基于wepy实现代码：

async onLoad() {

    await wx.login();

    this.userInfo = await wx.getUserInfo();

}

执行wepy new demo后，会生成类似配置文件。

{

  "wpyExt": ".wpy",

  "sass": {},

  "less": {},

  "babel": {}

}

<style type="less" src="page1.less"></style>

<template type="wxml" src="page1.wxml"></template>

<script>

    // some code

</script>

程序入口app.wpy

<style type="less">

/** less **/

</style>

<script>

import wepy from 'wepy';

export default class extends wepy.app {

    config = {

            "pages":[

            "pages/index/index"

        ],

        "window":{

            "backgroundTextStyle": "light",

            "navigationBarBackgroundColor": "#fff",

            "navigationBarTitleText": "WeChat",

            "navigationBarTextStyle": "black"

        }

    };

    onLaunch() {

        console.log(this);

    }

}

</script>

wepy页面index.wpy

<style type="less">

/** less **/

</style>

<template type="wxml">

    <view>

    </view>

    <component id="counter1" path="counter"></component>

</template>

<script>

import wepy form 'wepy';

import Counter from '../components/counter';

export default class Index extends wepy.page {

    config = {};

    components = {counter1: Counter};

    data = {};

    methods = {};

    events = {};

    onLoad() {};

    // Other properties

}

</script>

wepy组件com.wpy

<style type="less">

/** less **/

</style>

<template type="wxml">

    <view>  </view>

</template>

<script>

import wepy form 'wepy';

export default class Com extends wepy.component {

    components = {};

    data = {};

    methods = {};

    events = {};

    // Other properties

}

</script>

wepy 组件通信与交互

wepy.component基类提供三个方法$broadcast，$emit，$invoke

$this.$emit('some-event', , , , );

组件的事件监听需要写在events属性下，如：

import wepy form 'wepy';

export default class Com extends wepy.component {

    components = {};

    data = {};

    methods = {};

    events = {

        'some-event': ($event, ...args) {

               console.log(`${this.name} receive ${$event.name} from ${$event.source.name}`);

        }

    };

    // Other properties

}

$invoke$invoke是一个组件对另一个组件的直接调用，通过传入的组件路径找到相应组件，然后再调用其方法。

如果想在Page_Index中调用组件A的某个方法：

this.$invoke('ComA', 'someMethod', 'someArgs');

如果想在组件A中调用组件G的某个方法：

this.$invoke('./../ComB/ComG', 'someMethod', 'someArgs');

小程序通过Page提供的setData方法去绑定数据，如：

this.setData({title: 'this is title'});

wepy数据绑定方式

this.title = 'this is title';

在函数运行周期之外的函数里去修改数据需要手动调用$apply方法。如：

setTimeout(() => {

    this.title = 'this is title';

    this.$apply();

}, );

// 官方

wx.request({

    url: 'xxx',

    success: function (data) {

        console.log(data);

    }

});

// wepy 使用方式
// request 接口从只接收Object变为可接收String

wx.request('xxxx').then((d) => console.log(d));

优化事件参数传递

// 官方

<view id="tapTest" data-hi="WeChat" bindtap="tapName"> Click me! </view>

Page({

  tapName: function(event) {

    console.log(event.currentTarget.hi)// output: WeChat

  }

});

// wepy 建议传参方式

<view id="tapTest" data-wepy-params="1-wepy-something" bindtap="tapName"> Click me! </view>

events: {

    tapName (event, id, title, other) {

        console.log(id, title, other)// output: 1, wepy, something

    }

}

改变数据绑定方式

// 官方

<view> {{ message }} </view>

onLoad: function () {

    this.setData({message: 'hello world'});

}

// wepy

<view> {{ message }} </view>

onLoad () {

    this.message = 'hello world';

}

组件代替模板和模块

// 官方

<!-- item.wxml -->

<template name="item">

  <text>{{text}}</text>

</template>

<!-- index.wxml -->

<import src="item.wxml"/>

<template is="item" data="{{text: 'forbar'}}"/>

<!-- index.js -->

var item = require('item.js')

// wepy

<!-- /components/item.wpy -->

 <text>{{text}}</text>

<!-- index.wpy -->

<template>

    <component id="item"></component>

</template>

<script>

    import wepy from 'wepy';

    import Item from '../components/item';

    export default class Index extends wepy.page {

        components = { Item }

    }

</script>

WePY Demo

<style lang="less">

    @color: #4D926F;

    .userinfo {

        color: @color;

    }

</style>

<template lang="pug">

    view(class='container')

        view(class='userinfo' @tap='tap')

            mycom(:prop.sync='myprop' @fn.user='myevent')

            text {{now}}

</template>

<script>

    import wepy from 'wepy';

    import mycom from '../components/mycom';

    export default class Index extends wepy.page {

        components = { mycom };

        data = {

            myprop: {}

        };

        computed = {

            now () { return +new Date(); }

        };

        async onLoad() {

            await sleep();

            console.log('Hello World');

        }

        sleep(time) {

            return new Promise((resolve, reject) => setTimeout(() => resolve, time * ));

        }

    }

</script>

登录相关API wx.login。
获取用户信息API wx.getUserInfo。
Storage相关 wx.getStorage，wx.setStorage，wx.clearStorage。

开发

目录结构：

src

    components

        alpha.wpy --- 联系人

        chatboard.wpy --- "聊天面板" 组件

        contact.wpy --- "联系人" 组件

        discovery.wpy --- "发现" 组件

        input.wpy --- 聊天页输入框组件

        list.wpy --- 菜单列表组件

        me.wpy --- "我" 组件

        message.wpy --- message 组件

        tab.wpy --- tab 组件

    pages

        chat.wpy --- 聊天页

        index.wpy --- 首页

    app.wpy --- 小程序入口

image.png

src/pages/index.wpy：

<style type="sass">

    .body, .tab_item {

        height: %;

    }

</style>

<template>

    <view class="body">

        <view class="tab_item tab_message">

            <component id="message"></component>

        </view>

        <view class="tab_item tab_contact">

            <component id="contact"></component>

        </view>

        <view class="tab_item tab_discovery">

            <component id="discovery"></component>

        </view>

        <view class="tab_item tab_me">

            <component id="me"></component>

        </view>

        <component id="tab"></component>

    </view>

</template>

src/pages/chat.wpy:

<style type="sass">

    .body {

        height: %;

        background-color: #ededed;

    }

</style>

<template>

    <view class="body">

        <component id="chartboard"></component>

        <component id="input"></component>

    </view>

</template>

image.png

import m_contacts from '../mocks/contact';

import m_history from '../mocks/history';

export default {

    // 拉取用户信息

    getUserInfo () {},

    // 拉取与某个用户的聊天历史记录

    getHistory (id) {},

    // 拉取首页聊天列表

    getMessageList () {},

    // 发送聊天信息

    sendMsg (to, msg, type = 'text') {}

}

<template>

    <view class="message">

        <block wx:for="{{list}}" wx:for-index="index" wx:for-item="item">

            <view class="item" bindtap="select" data-wepy-params="{{item.id}}">

                <view class="header">

                    <image class="img" src="{{item.icon}}"></image>

                </view>

                <view class="content">

                    <view class="name">{{item.name}}</view>

                    <view class="lastmsg">{{item.lastmsg}}</view>

                </view>

            </view>

        </block>

    </view>

</template>

<script>

    import wepy from 'wepy';

    import api from '../common/api';

    export default class Message extends wepy.component {

        data = {

            list: []

        };

        methods = {

            select (evt, id) {

                wx.navigateTo({url: 'chat?id=' + id});

            }

        };

        async loadMessage () {

            this.list = await api.getMessageList();

            this.$apply();

        }

    }

</script>

// src/pages/index.wpy

onShow() {

    this.$invoke('message', 'loadMessage');

}

src/pages/index：

<template>

    <view class="body">

        <view class="tab_item tab_message" hidden="{{currentTab != 0}}">

            <component id="message"></component>

        </view>

        <view class="tab_item tab_contact" hidden="{{currentTab != 1}}">

            <component id="contact"></component>

        </view>

        <view class="tab_item tab_discovery" hidden="{{currentTab != 2}}">

            <component id="discovery"></component>

        </view>

        <view class="tab_item tab_me" hidden="{{currentTab != 3}}">

            <component id="me"></component>

        </view>

        <component id="tab"></component>

    </view>

</template>

<script>

    //....

    changeTab (idx) {

        this.currentTab = +idx;

        this.$apply();

    }

</script>

<script>

    import wepy from 'wepy';

    export default class Tab extends wepy.component {

        data = {

            active: ,

        };

        methods = {

            change (evt, idx) {

                this.active = +idx;

                this.$parent.changeTab(idx);

            }

        };

    }

</script>

parent.wpy

<child :item.sync="myitem" />

<repeat for="{{list}}" item="item" index="index">

   <item :item="item" />

</repeat>

巴特西

转载：wepy框架入门

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