message: chore(form): updte doc
diff: constructor() {
  super()
  -
  this.state = {
  checkedIndex: 0,
  alignList: [
  @@ -29,11 +28,9 @@ constructor() {
  }
  }
  -
  render(){
  const {position, checkedIndex} = this.state
  return (
  - <div>
  <div>
  <Radio
  list={this.state.alignList}
  @@ -49,18 +46,17 @@ render(){
  <br />
  <br />
  <Form labelWidth="80" labelPosition={this.state.position}>
  - <FormItem label={'name'}>
  - <Input placeholder={'username'} />
  + <FormItem label='name'>
  + <Input placeholder='username' />
  </FormItem>
  - <FormItem label={'phone'} >
  - <Input placeholder={'phone'} />
  + <FormItem label='phone' >
  + <Input placeholder='phone' />
  </FormItem>
  <FormItem>
  - <Button type={'primary'}>submit</Button>
  + <Button type='primary'>submit</Button>
  </FormItem>
  </Form>
  </div>
  - </div>
  )
  }
  ```
  @@ -75,21 +71,17 @@ render(){
  render(){
  return (
  - <div>
  - <div>
  <Form inline={true}>
  <FormItem label="username" labelWidth="80">
  - <Input placeholder={'username'} />
  + <Input placeholder='username' />
  </FormItem>
  <FormItem label="password" labelWidth="80">
  - <Input placeholder={'password'} />
  + <Input placeholder='password' />
  </FormItem>
  <FormItem>
  - <Button type={'primary'}>submit</Button>
  + <Button type='primary'>submit</Button>
  </FormItem>
  </Form>
  - </div>
  - </div>
  )
  }
  ```
  @@ -104,9 +96,7 @@ render(){
  constructor(props) {
  super(props)
  -
  this.form = React.createRef()
  -
  this.state = {
  form: {
  name: '',
  @@ -118,7 +108,7 @@ constructor(props) {
  name: [
  {
  required: true,
  - message: <span style={{color: '#ccc'}}>input name</span>,
  + message: <span><Icon name="close-circle"/> input name</span>,
  trigger: 'onBlur,onChange'
  }
  ],
  @@ -147,7 +137,7 @@ constructor(props) {
  cb()
  }
  },
  - trigger: 'change'
  + trigger: 'onChange'
  }
  ]
  }
  @@ -181,14 +171,12 @@ handleChange(key, e, value, index) {
  render(){
  const {form, checkedIndex} = this.state
  return (
  - <div>
  - <div>
  <Form ref={this.form} model={form} rules={this.state.rules} labelWidth="80">
  <FormItem label="Name" prop="name">
  - <Input value={form.name} placeholder={'name'} onChange={this.handleChange.bind(this, 'name')}/>
  + <Input value={form.name} placeholder='name' onChange={this.handleChange.bind(this, 'name')}/>
  </FormItem>
  <FormItem label="Count" prop="count">
  - <Input value={form.count} placeholder={'count'} onChange={this.handleChange.bind(this, 'count')}/>
  + <Input value={form.count} placeholder='count' onChange={this.handleChange.bind(this, 'count')}/>
  </FormItem>
  <FormItem label="Area" prop="region">
  <Radio
  @@ -209,8 +197,6 @@ render(){
  <Button type={'primary'} onClick={this.handleSubmit.bind(this)}>Submit</Button>
  </FormItem>
  </Form>
  - </div>
  - </div>
  )
  }
  ```
  