【共享單車】—— React後臺管理系統開發手記:AntD Form基礎組件

前言:如下內容基於React全家桶+AntD實戰課程的學習實踐過程記錄。最終成果github地址:https://github.com/66Web/react-antd-manager,歡迎star。javascript


 1、使用Form組件開發登陸頁面java

 

  • pages->form->login.js:對應路由/admin/form/login
import React from 'react'
import {Card, Form, Input, Button, message, Icon, Checkbox} from 'antd'

const FormItem = Form.Item

class FormLogin extends React.Component{
    handleSubmit = () => {
        let userInfo = this.props.form.getFieldsValue();
        this.props.form.validateFields((err, values) => {
            if(!err){
                message.success(`${userInfo.userName} 恭喜你,您經過本次表單組件學習,當前密碼爲:${userInfo.userPwd}`)
            }
        })
    }

    render(){
        const { getFieldDecorator } = this.props.form;
        return (
            <div>
                <Card title="登陸行內表單">
                    <Form layout="inline">
                        <FormItem>
                            <Input placeholder="請輸入用戶名"/>
                        </FormItem>
                        <FormItem>
                            <Input placeholder="請輸入密碼"/>
                        </FormItem>
                        <FormItem>
                            <Button type="primary">登陸</Button>
                        </FormItem>
                    </Form>
                </Card>
                <Card title="登陸水平表單" style={{marginTop:10}}>
                    <Form layout="horizontal" style={{width:300}}>
                        <FormItem> 
                            {
                                getFieldDecorator('userName', {
                                    initialValue:'Elena',
                                    rules:[
                                        {
                                            required: true,
                                            message:'用戶名不能爲空'
                                        },
                                        {
                                            min:5, max:10,
                                            message: '長度不在範圍內'
                                        },
                                        {
                                            pattern: new RegExp('^\\w+$','g'),
                                            message: '用戶名必須爲字母或數字'
                                        }
                                    ]
                                })(
                                <Input prefix={<Icon type="user"/>} placeholder="請輸入用戶名"/>
                                )
                            }  
                        </FormItem>
                        <FormItem>
                            {
                                getFieldDecorator('userPwd', {
                                    initialValue:'123456',
                                    rules:[
                                        {
                                            required: true,
                                            message:'密碼不能爲空'
                                        },
                                        {
                                            min:6, max:8,
                                            message: '長度不在範圍內'
                                        }
                                    ]
                                })(
                                <Input prefix={<Icon type="lock"/>} type="password" placeholder="請輸入密碼"/>
                                )
                            }
                        </FormItem>
                        <FormItem>
                            {
                                getFieldDecorator('remember', {
                                    valuePropName: 'checked',
                                    initialValue: true,
                                })(
                                   <Checkbox>記住密碼</Checkbox>
                                )
                            }
                            <a href="#" style={{float:'right'}}>忘記密碼</a>
                        </FormItem>
                        <FormItem>
                            <Button type="primary" onClick={this.handleSubmit}>登陸</Button>
                        </FormItem>
                    </Form>
                </Card>
            </div>
        )
    }
}

export default Form.create()(FormLogin);
  • Form組件
  1. layout屬性:表示表單佈局 -- inline行內表單/horizontal水平表單
  2. getFieldDecorator屬性:幫助進行初始化值,獲取數據
  3. getFieldDecorator(‘表單裏的一些對象’,定義的規則和值)(組件)
    {
          getFieldDecorator('userName', {
                 initialValue:'Elena',
                 rules:[
                      {
                            required: true,
                            message:'用戶名不能爲空'
                      },
                      {
                            min:5, max:10,
                            message: '長度不在範圍內'
                      },
                      {
                            pattern: new RegExp('^\\w+$','g'),
                            message: '用戶名必須爲字母或數字'
                      }
                  ]
          })(
                  <Input prefix={<Icon type="user"/>} placeholder="請輸入用戶名"/>
          )
    }  
    

    須要在組件最下方添加 ↓:(通過 Form.create 包裝的組件將會自帶 this.props.form 屬性react

    export default Form.create()(FormLogin);
  4. prefix屬性:加前綴,使用Icon組件添加小圖標git

     <Input prefix={<Icon type="user"/>} placeholder="請輸入用戶名"/>
  5. 指定表單的寬度github

    style={{width:300}}
    
  6. 設置記住密碼框默認選中
     {
           getFieldDecorator('remember', {
                  valuePropName: 'checked',
                  initialValue: true,
           })(
                  <Checkbox>記住密碼</Checkbox>
           )
    }
  • options.rules校驗規則
  1. required:是否必選
  2. min : 最小長度
  3. max : 最大長度
  4. len : 字段長度
  5. partten : 正則表達式
  6. type: 內建校驗類型  類型選項 

 

2、使用Form組件開發註冊頁面正則表達式

 

  • pages->form->register.js:對應路由/admin/form/reg
import React from 'react'
import moment from 'moment'
import {Card,Form,Input,Button,Checkbox,Radio,InputNumber,Select,Switch,DatePicker,TimePicker,Upload,Icon,message} from 'antd'

const FormItem = Form.Item
const RadioGroup = Radio.Group
const Option = Select.Option;
const TextArea = Input.TextArea

class FormRegister extends React.Component {
    state = {
        loading: false,
    };
    handleSubmit = () => {
        let userInfo = this.props.form.getFieldsValue();
        console.log(JSON.stringify(userInfo))
        message.success(`${userInfo.userName} 恭喜你,您經過本次表單組件學習,當前密碼爲:${userInfo.userPwd}`)
    }
    handleResetInfo = () => {
        this.props.form.resetFields();
    }
    //模擬上傳jpg -- 直接從官網複製過來便可 
    getBase64 = (img, callback) => {
        const reader = new FileReader();
        reader.addEventListener('load', () => callback(reader.result));
        reader.readAsDataURL(img);
    }
    handleChange = (info) => {
        if (info.file.status === 'uploading') {
          this.setState({ loading: true });
          return;
        }
        if (info.file.status === 'done') {
          // Get this url from response in real world.
          this.getBase64(info.file.originFileObj, imageUrl => this.setState({
            userImg: imageUrl,
            loading: false,
          }));
        }
    }
    render(){
        const { getFieldDecorator } = this.props.form;
        const formItemLayout = {
            labelCol: {
                xs: 24,
                sm: 4
            },
            wrapperCol: {
                xs: 24,
                sm: 12
            }
        }
        const offsetLayout = {
            wrapperCol: {
                xs: 24,
                sm: {
                    span:12, 
                    offset:4
                }
            }
        }
        const rowObject = {
            minRows: 4, 
            maxRows: 6   
        }
        return (
            <div>
                <Card title="註冊表單">
                    <Form layout="horizontal">
                        <FormItem label="用戶名" {...formItemLayout}>
                           {
                                getFieldDecorator('userName', {
                                    initialValue:'Elena',
                                    rules:[
                                        {
                                            required: true,
                                            message:'用戶名不能爲空'
                                        }
                                    ]
                                })(
                                <Input placeholder="請輸入用戶名"/>
                                )
                            }  
                        </FormItem>
                        <FormItem label="密碼" {...formItemLayout}>
                            {
                                getFieldDecorator('userPwd', {
                                    initialValue:'123456',
                                    rules:[
                                        {
                                            required: true,
                                            message:'密碼不能爲空'
                                        }
                                    ]
                                })(
                                <Input type="password" placeholder="請輸入密碼"/>
                                )
                            }
                        </FormItem>
                        <FormItem label="性別" {...formItemLayout}>
                            {
                                getFieldDecorator('sex', {
                                    initialValue:'1'
                                })(
                                   <RadioGroup>
                                       <Radio value="1">女</Radio>
                                       <Radio value="2">男</Radio>
                                   </RadioGroup>
                                )
                            }
                        </FormItem>
                        <FormItem label="年齡" {...formItemLayout}>
                            {
                                getFieldDecorator('age', {
                                    initialValue:'18'
                                })(
                                   <InputNumber /> 
                                )
                            }
                        </FormItem>
                        <FormItem label="當前狀態" {...formItemLayout}>
                            {
                                getFieldDecorator('state', {
                                    initialValue:'1'
                                })(
                                   <Select>
                                       <Option value="1">鹹魚一條</Option>
                                       <Option value="2">人民公僕</Option>
                                       <Option value="3">浙傳才女一枚</Option>
                                       <Option value="4">科技公司FE</Option>
                                       <Option value="5">創業者</Option>
                                   </Select>
                                )
                            }
                        </FormItem>
                        <FormItem label="愛好" {...formItemLayout}>
                            {
                                getFieldDecorator('state', {
                                    initialValue:['1','3','5']
                                })(
                                   <Select mode="multiple">
                                       <Option value="1">旅行</Option>
                                       <Option value="2">讀書</Option>
                                       <Option value="3">剪輯</Option>
                                       <Option value="4">拍照</Option>
                                       <Option value="5">看電影</Option>
                                   </Select>
                                )
                            }
                        </FormItem>
                        <FormItem label="是否已婚" {...formItemLayout}>
                            {
                                getFieldDecorator('isMarried', {
                                    valuePropName: 'checked',
                                    initialValue: true
                                })(
                                  <Switch />
                                )
                            }
                        </FormItem>
                        <FormItem label="生日" {...formItemLayout}>
                            {
                                getFieldDecorator('birthday', {
                                    initialValue: moment('2019-1-1 11:14:59')
                                })(
                                  <DatePicker 
                                       showTime
                                       format="YYYY-MM-DD HH:mm:ss"
                                  />
                                )
                            }
                        </FormItem>
                        <FormItem label="聯繫地址" {...formItemLayout}>
                            {
                                getFieldDecorator('address',{
                                    initialValue: '西虹市海淀區桃花公園'
                                })(
                                  <TextArea 
                                      autosize={rowObject}
                                  />
                                )
                            }
                        </FormItem>
                        <FormItem label="早起時間" {...formItemLayout}>
                            {
                                getFieldDecorator('time')(
                                  <TimePicker />
                                )
                            }
                        </FormItem>
                        <FormItem label="頭像" {...formItemLayout}>
                            {
                                getFieldDecorator('userImg')(
                                  <Upload
                                      listType="picture-card"
                                      showUploadList={false}
                                      action="//jsonplaceholder.typicode.com/posts/"
                                      onChange={this.handleChange}
                                  >
                                  {this.state.userImg?<img src={this.state.userImg}/>:<Icon type="plus"/>}
                                  </Upload>
                                )
                            }
                        </FormItem>
                        <FormItem {...offsetLayout}>
                            {
                                getFieldDecorator('imooc')(
                                   <Checkbox>我已閱讀過<a href="#">慕課協議</a></Checkbox>
                                )
                            }
                        </FormItem>
                        <FormItem {...offsetLayout}>
                             <Button type="primary" onClick={this.handleSubmit}>提交</Button>
                             <Button style={{marginLeft:10}} onClick={this.handleResetInfo}>重置</Button>
                        </FormItem>
                    </Form>
                </Card>
            </div>
        )
    }
}

export default Form.create()(FormRegister);
  • Form支持響應式尺寸
    //Form組件內嵌的柵格佈局
    const formItemLayout = {
                labelCol: {
                    xs: 24,
                    sm: 4
                },
                wrapperCol: {
                    xs: 24,
                    sm: 12
                }
    }
    //偏移佈局
    const offsetLayout = {
                wrapperCol: {
                    xs: 24,
                    sm: {
                        span:12, 
                        offset:4  //向右偏移4列
                    }
                }
     }
    
  • 數字框:<InputNumber/>json

  • 時間類組件: DatePickerbash

  1. value 類型爲 moment 對象,因此在提交服務器前須要預處理
  2. 安裝moment服務器

    yarn add moment --save
  3. 引用momentantd

    import moment from "moment";
    ……
    <FormItem label="生日" {...formItemLayout}>
           {
                 getFieldDecorator('birthday', {
                         initialValue: moment('2019-1-1 11:14:59')
                 })(
                         <DatePicker 
                                  showTime
                                  format="YYYY-MM-DD HH:mm:ss"
                          />
                  )
            }
    </FormItem>
    
  • 獲取表單中Object對象

  1. 調用getFieldsValue方法:獲取一組輸入控件的值,如不傳入參數,則獲取所有組件的值

    let userInfo = this.props.form.getFieldsValue();
  2. 重置表單內容:調用resetFields方法 

    this.props.form.resetFields()
    
  3. 注意:使用 getFieldsValue、getFieldValue、setFieldsValue 等時,須要確保對應的 field 已經用 getFieldDecorator 註冊過了

  4. 其它Api:官網文檔 

  • 上傳文件類組件:Upload
  1. action屬性:上傳的服務器地址
  2. listType屬性:上傳列表的內建樣式  text/picture/picture-card
  3. showUploadList屬性:是否展現上傳列表內容 {false}↑ 或{true}↓
  4. onChange屬性:上傳文件狀態改變的回調,詳見 onChange
  5. 使用Upload組件必需的幾個方法:
     //模擬上傳jpg -- 直接從官網複製過來便可 
    getBase64 = (img, callback) => {
            const reader = new FileReader();
            reader.addEventListener('load', () => callback(reader.result));
            reader.readAsDataURL(img);
    }
    handleChange = (info) => {
            if (info.file.status === 'uploading') {
              this.setState({ loading: true });
              return;
            }
            if (info.file.status === 'done') {
              // Get this url from response in real world.
              this.getBase64(info.file.originFileObj, imageUrl => this.setState({
                userImg: imageUrl,
                loading: false,
              }));
            }
    }

注:項目來自慕課網

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