React+webpack从0到1开发一个todoMvc（五）

1.创建 LeanCloud 账户

2.创建TodoMVC应用

如下图操作：

3.准备HTML页面

登陆和注册的页面同样也以组件的形式单独抽离出来，样式如图：

import React from 'react'
import { Form, Icon, Input, Button } from 'antd';

const FormItem = Form.Item;

const Login = Form.create()(React.createClass({
  handleSubmit(e) {  // 提交操作
    e.preventDefault();
    this.props.form.validateFields((err, values) => {
      if (!err) {
        this.props.loginOrSignUp(values)
      }
    });
  },
  render() {
    const { getFieldDecorator } = this.props.form;
    let text = this.props.value == 1 ?'注册':'登陆' // 判断“登陆”或者注册功能
    return (
        <Form onSubmit={this.handleSubmit} className="login-form"> // antdUI的表单
          <FormItem>
            {getFieldDecorator('userName', {
              rules: [{ required: true, message: 'Please input your username!' }],
            })(
                <Input addonBefore={<Icon type="user" />} placeholder="Username" />
            )}
          </FormItem>
          <FormItem>
            {getFieldDecorator('password', {
              rules: [{ required: true, message: 'Please input your Password!' }], // 必须填写项
            })(
                <Input addonBefore={<Icon type="lock" />} type="password" placeholder="Password" />
            )}
          </FormItem>
          <FormItem>
            <Button type="primary" htmlType="submit" className="login-form-button">
              {text}
            </Button>
          </FormItem>
        </Form>
    );
  },
}));
export default Login

在app.js中做判断，如果已登录，则显示ToDo应用界面，否则显示登陆界面：

render(){
  if (!this.state.currentUser){ // 判断是否已经登录
    const RadioGroup = Radio.Group;
    return (
        <div className="form-wrapper">
          <h1 className="todo-title">React-Todos</h1>
          <RadioGroup className="radio-wrapper" onChange={this.onChange.bind(this)} value={this.state.value}>
            <Radio value={1}>注册</Radio>
            <Radio value={2}>登入</Radio>
          </RadioGroup>
          <Login loginOrSignUp={this.loginOrSignUp.bind(this)} value={this.state.value}/>
        </div>
    )
  } else {
    let info = {
      isAllChecked: this.state.isAllChecked,
      todoCount: this.state.todos.length || 0,
      todoDoneCount: (this.state.todos && this.state.todos.filter((todo) => todo.isDone)).length || 0
    }
    return (
        <div className="todo-wrapper">
          <TodoHeader addTodo={this.addTodo.bind(this)} currentUser={this.state.currentUser} logout={this.logout.bind(this)}/>
          <TodoMain todos={this.state.todos} changeTodoState={this.changeTodoState.bind(this)} deleteTodo={this.deleteTodo.bind(this)} saveOrUpdateTodos={this.saveOrUpdateTodos.bind(this)}/>
          <TodoFooter {...info} clearDone={this.clearDone.bind(this)} changeTodoState={this.changeTodoState.bind(this)}/>
        </div>
    )
  }
}

4.注册&登陆

$ npm install leancloud-storage --save

import AV from 'leancloud-storage'

const appId = 'XXXXXXXXXXXXXXXXXXXXXX' //这里的appId就是刚才我们创建的应用的Id，每个人都不一样
const appKey = 'XXXXXXXXXXXXXXXXXXX';
AV.init({ appId, appKey });

//登陆或者注册
loginOrSignUp(values){
  //判断是登陆还是注册
  if (this.state.value === 1){
    let user = new AV.User();
    user.setUsername(values.userName);
    user.setPassword(values.password);
    user.signUp().then((loginedUser) => {
      this.state.currentUser = this.getCurrentUser()
      this.setState({currentUser: this.state.currentUser})
    }, function (error) {
      alert("注册失败")
    })
  } else if (this.state.value === 2){
    console.log("执行登陆")
    AV.User.logIn(values.userName, values.password).then((loginedUser) => {
      this.state.currentUser = this.getCurrentUser()
      this.setState({currentUser: this.state.currentUser})
      this.fetchTodos()
    }, function (error) {
      alert("登陆失败")
    });
  }
}