• 【共享单车】—— React后台管理系统开发手记:AntD Form基础组件


    前言:以下内容基于React全家桶+AntD实战课程的学习实践过程记录。最终成果github地址:https://github.com/66Web/react-antd-manager,欢迎star。


     一、使用Form组件开发登录页面

     

    • pages->form->login.js:对应路由/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(`${userInfo.userName} 恭喜你,您通过本次表单组件学习,当前密码为:${userInfo.userPwd}`)
                }
            })
        }
    
        render(){
            const { getFieldDecorator } = this.props.form;
            return (
                <div>
                    <Card title="登录行内表单">
                        <Form layout="inline">
                            <FormItem>
                                <Input placeholder="请输入用户名"/>
                            </FormItem>
                            <FormItem>
                                <Input placeholder="请输入密码"/>
                            </FormItem>
                            <FormItem>
                                <Button type="primary">登录</Button>
                            </FormItem>
                        </Form>
                    </Card>
                    <Card title="登录水平表单" style={{marginTop:10}}>
                        <Form layout="horizontal" style={{300}}>
                            <FormItem> 
                                {
                                    getFieldDecorator('userName', {
                                        initialValue:'Elena',
                                        rules:[
                                            {
                                                required: true,
                                                message:'用户名不能为空'
                                            },
                                            {
                                                min:5, max:10,
                                                message: '长度不在范围内'
                                            },
                                            {
                                                pattern: new RegExp('^\w+$','g'),
                                                message: '用户名必须为字母或数字'
                                            }
                                        ]
                                    })(
                                    <Input prefix={<Icon type="user"/>} placeholder="请输入用户名"/>
                                    )
                                }  
                            </FormItem>
                            <FormItem>
                                {
                                    getFieldDecorator('userPwd', {
                                        initialValue:'123456',
                                        rules:[
                                            {
                                                required: true,
                                                message:'密码不能为空'
                                            },
                                            {
                                                min:6, max:8,
                                                message: '长度不在范围内'
                                            }
                                        ]
                                    })(
                                    <Input prefix={<Icon type="lock"/>} type="password" placeholder="请输入密码"/>
                                    )
                                }
                            </FormItem>
                            <FormItem>
                                {
                                    getFieldDecorator('remember', {
                                        valuePropName: 'checked',
                                        initialValue: true,
                                    })(
                                       <Checkbox>记住密码</Checkbox>
                                    )
                                }
                                <a href="#" style={{float:'right'}}>忘记密码</a>
                            </FormItem>
                            <FormItem>
                                <Button type="primary" onClick={this.handleSubmit}>登录</Button>
                            </FormItem>
                        </Form>
                    </Card>
                </div>
            )
        }
    }
    
    export default Form.create()(FormLogin);
    
    • Form组件
    1. layout属性:表示表单布局 -- inline行内表单/horizontal水平表单
    2. getFieldDecorator属性:帮助进行初始化值,获取数据
    3. getFieldDecorator(‘表单里的一些对象’,定义的规则和值)(组件)
      {
            getFieldDecorator('userName', {
                   initialValue:'Elena',
                   rules:[
                        {
                              required: true,
                              message:'用户名不能为空'
                        },
                        {
                              min:5, max:10,
                              message: '长度不在范围内'
                        },
                        {
                              pattern: new RegExp('^\w+$','g'),
                              message: '用户名必须为字母或数字'
                        }
                    ]
            })(
                    <Input prefix={<Icon type="user"/>} placeholder="请输入用户名"/>
            )
      }  
      

      需要在组件最下方添加 ↓:(经过 Form.create 包装的组件将会自带 this.props.form 属性

      export default Form.create()(FormLogin);
    4. prefix属性:加前缀,使用Icon组件添加小图标

       <Input prefix={<Icon type="user"/>} placeholder="请输入用户名"/>
    5. 指定表单的宽度

      style={{300}}
      
    6. 设置记住密码框默认选中
       {
             getFieldDecorator('remember', {
                    valuePropName: 'checked',
                    initialValue: true,
             })(
                    <Checkbox>记住密码</Checkbox>
             )
      }
    • options.rules校验规则
    1. required:是否必选
    2. min : 最小长度
    3. max : 最大长度
    4. len : 字段长度
    5. partten : 正则表达式
    6. type: 内建校验类型  类型选项 

    二、使用Form组件开发注册页面

     

    • pages->form->register.js:对应路由/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(`${userInfo.userName} 恭喜你,您通过本次表单组件学习,当前密码为:${userInfo.userPwd}`)
        }
        handleResetInfo = () => {
            this.props.form.resetFields();
        }
        //模拟上传jpg -- 直接从官网复制过来即可 
        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="注册表单">
                        <Form layout="horizontal">
                            <FormItem label="用户名" {...formItemLayout}>
                               {
                                    getFieldDecorator('userName', {
                                        initialValue:'Elena',
                                        rules:[
                                            {
                                                required: true,
                                                message:'用户名不能为空'
                                            }
                                        ]
                                    })(
                                    <Input placeholder="请输入用户名"/>
                                    )
                                }  
                            </FormItem>
                            <FormItem label="密码" {...formItemLayout}>
                                {
                                    getFieldDecorator('userPwd', {
                                        initialValue:'123456',
                                        rules:[
                                            {
                                                required: true,
                                                message:'密码不能为空'
                                            }
                                        ]
                                    })(
                                    <Input type="password" placeholder="请输入密码"/>
                                    )
                                }
                            </FormItem>
                            <FormItem label="性别" {...formItemLayout}>
                                {
                                    getFieldDecorator('sex', {
                                        initialValue:'1'
                                    })(
                                       <RadioGroup>
                                           <Radio value="1">女</Radio>
                                           <Radio value="2">男</Radio>
                                       </RadioGroup>
                                    )
                                }
                            </FormItem>
                            <FormItem label="年龄" {...formItemLayout}>
                                {
                                    getFieldDecorator('age', {
                                        initialValue:'18'
                                    })(
                                       <InputNumber /> 
                                    )
                                }
                            </FormItem>
                            <FormItem label="当前状态" {...formItemLayout}>
                                {
                                    getFieldDecorator('state', {
                                        initialValue:'1'
                                    })(
                                       <Select>
                                           <Option value="1">咸鱼一条</Option>
                                           <Option value="2">人民公仆</Option>
                                           <Option value="3">浙传才女一枚</Option>
                                           <Option value="4">科技公司FE</Option>
                                           <Option value="5">创业者</Option>
                                       </Select>
                                    )
                                }
                            </FormItem>
                            <FormItem label="爱好" {...formItemLayout}>
                                {
                                    getFieldDecorator('state', {
                                        initialValue:['1','3','5']
                                    })(
                                       <Select mode="multiple">
                                           <Option value="1">旅行</Option>
                                           <Option value="2">读书</Option>
                                           <Option value="3">剪辑</Option>
                                           <Option value="4">拍照</Option>
                                           <Option value="5">看电影</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="联系地址" {...formItemLayout}>
                                {
                                    getFieldDecorator('address',{
                                        initialValue: '西虹市海淀区桃花公园'
                                    })(
                                      <TextArea 
                                          autosize={rowObject}
                                      />
                                    )
                                }
                            </FormItem>
                            <FormItem label="早起时间" {...formItemLayout}>
                                {
                                    getFieldDecorator('time')(
                                      <TimePicker />
                                    )
                                }
                            </FormItem>
                            <FormItem label="头像" {...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>我已阅读过<a href="#">慕课协议</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支持响应式尺寸
      //Form组件内嵌的栅格布局
      const formItemLayout = {
                  labelCol: {
                      xs: 24,
                      sm: 4
                  },
                  wrapperCol: {
                      xs: 24,
                      sm: 12
                  }
      }
      //偏移布局
      const offsetLayout = {
                  wrapperCol: {
                      xs: 24,
                      sm: {
                          span:12, 
                          offset:4  //向右偏移4列
                      }
                  }
       }
      
    • 数字框:<InputNumber/>

    • 时间类组件: DatePicker

    1. value 类型为 moment 对象,所以在提交服务器前需要预处理
    2. 安装moment

      yarn add moment --save
    3. 引用moment

      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>
      
    • 获取表单中Object对象

    1. 调用getFieldsValue方法:获取一组输入控件的值,如不传入参数,则获取全部组件的值

      let userInfo = this.props.form.getFieldsValue();
    2. 重置表单内容:调用resetFields方法 

      this.props.form.resetFields()
      
    3. 注意:使用 getFieldsValue、getFieldValue、setFieldsValue 等时,需要确保对应的 field 已经用 getFieldDecorator 注册过了

    4. 其它Api:官网文档 

    • 上传文件类组件:Upload
    1. action属性:上传的服务器地址
    2. listType属性:上传列表的内建样式  text/picture/picture-card
    3. showUploadList属性:是否展示上传列表内容 {false}↑ 或{true}↓
    4. onChange属性:上传文件状态改变的回调,详见 onChange
    5. 使用Upload组件必需的几个方法:
       //模拟上传jpg -- 直接从官网复制过来即可 
      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:项目来自慕课网

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  • 原文地址:https://www.cnblogs.com/ljq66/p/10204437.html
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