问React本机如何更新下拉列表

EN

// Your method callback
onSelect = (option) => {
  const newOptions = computeNewOptions(option)
  this.setState({options: newOptions})
}

// Your Second dropdown component would take these options in as a prop

render () {
  return (
    <SecondDropDown options={this.state.options} />
 )
}

 // You can then access your options through the props
 export default class SecondDropDown extends React.Component {
   render () {
     let myOptions = renderOptions(this.props.options)
     return (
       <View>
         {myOptions}
       </View>
     )
   }
 }