准备

安装

node -v
# v12.14.1

cnpm i -g @tarojs/cli

taro -v
# 3.0.17

初始化

taro init hello-taro
# ? 请输入项目介绍！
# ? 请选择框架 React
# ? 是否需要使用 TypeScript ？ No
# ? 请选择 CSS 预处理器（Sass/Less/Stylus） Sass
# ? 请选择模板源 Gitee（最快）
# ✔ 拉取远程模板仓库成功！
# ? 请选择模板 taro-ui

cd hello-taro

cnpm run dev:h5

浏览器打开http://127.0.0.1:10086/

小程序

下载并安装微信开发者工具

cnpm run dev:weapp

微信开发者工具 => 导入项目 => hello-taro/dist

登录页

mkdir src/pages/login/

vim src/pages/login/index.jsx

import React, { Component } from 'react'
import { View, Text } from '@tarojs/components'

export default class Index extends Component {
    render() {
        return (
            <View className='index'>
                <Text>登录页面</Text>
            </View>
        )
    }
}

vim src/pages/login/index.config.js

export default {
    navigationBarTitleText: '登录'
}

vim src/app.config.js

export default {
    pages: [
        'pages/index/index',
        'pages/login/index'
    ],
    // 省略未修改代码
}

vim src/pages/index/index.jsx

import React from 'react'
import { View } from '@tarojs/components'
import Taro from '@tarojs/taro'
import { AtButton } from 'taro-ui'

import "taro-ui/dist/style/components/button.scss" // 按需引入

export default function Index() {
    return (
        <View className='index'>
            <AtButton type='primary' onClick={() => {
                Taro.navigateTo({
                    url: '/pages/login/index'
                })
            }}>登录</AtButton>
        </View>
    )
}

状态管理

vim src/pages/login/index.jsx

import React, { useState } from 'react'
import { View, Text } from '@tarojs/components'
import { AtButton, AtInput } from 'taro-ui'

import "taro-ui/dist/style/components/input.scss"
import "taro-ui/dist/style/components/button.scss"

export default function Login() {
    const [username, setUsername] = useState()
    const [password, setPassword] = useState()

    const handleUsernameChange = (value) => {
        setUsername(value)
    }

    const handlePasswordChange = (value) => {
        setPassword(value)
    }

    const handleLogin = () => {
        console.log('login onclick')
    }

    return (
        <View className='index'>
            <AtInput
                name='username'
                title='用户名'
                type='text'
                placeholder='请输入用户名'
                value={username}
                onChange={handleUsernameChange}
            />
            <AtInput
                name='password'
                title='密码'
                type='password'
                placeholder='请输入密码'
                value={password}
                onChange={handlePasswordChange}
            />
            <AtButton
                type='primary'
                size='normal'
                onClick={handleLogin}
            >
                登录
            </AtButton>
            <Text>{username} | {password}</Text>
        </View >
    )
}

cnpm i --save dva-core dva-loading redux react-redux redux-logger

mdkir src/utils src/models

vim src/utils/dva.js

import { create } from 'dva-core'
import createLoading from 'dva-loading'
import { createLogger } from 'redux-logger'

let app, store, dispatch, registered

function createApp(options) {
    options.onAction = [createLogger()]

    app = create(options)
    app.use(createLoading({}))

    if (!global.registered) {
        options.models.forEach(model => app.model(model))
    }
    registered = true
    app.start()

    store = app._store
    app.getStore = () => store

    dispatch = store.dispatch
    app.getDispatch = () => dispatch

    return app
}

export default { createApp }

vim src/models/login.js

const namespace = 'login'

export default {
    namespace,
    state: {
        count: 0
    },
    reducers: {
        overrideStateProps(state, { payload }) {
            return {
                ...state,
                ...payload
            }
        }
    },
}

vim src/models/index.js

import login from './login'

export default [login]

vim src/app.js

import React, { Component } from 'react'
import { Provider } from 'react-redux'
import dva from './utils/dva'
import models from './models'

import './app.scss'

const dvaApp = dva.createApp({
    initialState: {},
    models: models
})

const store = dvaApp.getStore()

class App extends Component {
    render() {
        return <Provider store={store}>{this.props.children}</Provider>
    }
}

export default App

vim src/pages/login/index.jsx

// 省略未修改代码
import { useDispatch, useSelector } from 'react-redux'

export default function Login() {
    const dispatch = useDispatch()
    const { count } = useSelector(store => store.login)

    // 省略未修改代码

    const handleLogin = () => {
        dispatch({
            type: 'login/overrideStateProps',
            payload: {
                count: count + 1
            }
        })
    }

    return (
        <View className='index'>
            // 省略未修改代码
            <Text>{username} | {password} | {count}</Text>
        </View >
    )
}

请求接口

vim src/utils/request.js

import Taro from '@tarojs/taro'

export default (options = { method: 'GET', data: {}, url: '' }) => {
    return Taro.request({
        url: options.url,
        data: {
            ...options.data
        },
        header: {
            'Content-Type': 'application/json'
        },
        method: options.method.toUpperCase()
    }).then(res => res.data)
}

mkdir src/services

vim src/services/login.js

import request from '../utils/request'

export default class Login {
    static login(params) {
        return request({
            url: 'http://test.nuozhilin.site/demo/login',
            method: 'POST',
            data: {
                ...params
            }
        })
    }
}

vim src/models/login.js

import Login from '../services/login'
import Taro from '@tarojs/taro'

// 省略未修改代码

export default {
    // 省略未修改代码
    effects: {
        *login({ payload }, { call }) {
            const { username, password } = payload
            const response = yield call(Login.login, { username, password })
            if (response.code === 0) {
                Taro.showToast({
                    title: '登录成功',
                    icon: 'none'
                })
            } else {
                Taro.showToast({
                    title: '密码错误',
                    icon: 'none'
                })
            }
        }
    }
}

vim src/pages/login/index.jsx

// 省略未修改代码

export default function Login() {
    // 省略未修改代码

    const handleLogin = () => {
        dispatch({
            type: 'login/overrideStateProps',
            payload: {
                count: count + 1
            }
        })
        dispatch({
            type: 'login/login',
            payload: {
                username,
                password
            }
        })
    }

    // 省略未修改代码
}