获取验证码',seconds: 60,//称数初始化 liked: true //获取验证码文案 } }

{ let siv = setInterval(() => { this.setState({ liked:false,seconds:this.state.seconds - 1,},() => { if(this.state.seconds == 0){ clearInterval(siv); this.setState({ liked:true,secounds:60 }) } }); },1000); }

{getFieldDecorator('captcha',{ rules: [{ required: true,message: '请输入短信验证码!' }],})( )} { this.state.liked ? {this.state.btnText} : {this.state.seconds + ' s 后重新发送'} }

export default class Timer extends Component {

constructor(props) {
super(props)
this.state = {
bool: false,days: '0',hours: '00',minutes: '00',seconds: '00'
}
}

componentDidMount() {
this.start()
}

async start() {
this.timer && clearTimeout(this.timer) // 先清除一遍定时器，避免被调用多次
// 发起任意一个服务器请求， 然后从headers 里获取服务器时间
let leftTime = await axios.get('/').then(response => {
return new Date(this.props.date).getTime() - new Date(response.headers.date).getTime() // 服务器与倒计时的 时间差
}).catch(error => {
console.log(error)
return 0 // 这里发送的服务器请求失败 设为0
})

// 倒计时
this.timer = setInterval(() => {
leftTime = leftTime - 1000
let { bool,days = '0',hours = '00',minutes = '00',seconds = '00' } = this.countdown(leftTime)
if (bool) { // 结束倒计时
clearTimeout(this.timer)
}
this.setState({
bool,days,hours,minutes,seconds
})
},1000)
}

/**

• 倒计时
• @param leftTime 要倒计时的时间戳
  */
  countdown(leftTime) {
  let bool = false
  if (leftTime <= 0) {
  bool = true
  return { bool }
  }
  var days = parseInt(leftTime / 1000 / 60 / 60 / 24,10) //计算剩余的天数
  var hours = parseInt(leftTime / 1000 / 60 / 60 % 24,10)
  if (hours < 10) {
  hours = '0' + hours
  }
  var minutes = parseInt(leftTime / 1000 / 60 % 60,10)
  if (minutes < 10) {
  minutes = '0' + minutes
  }
  var seconds = parseInt(leftTime / 1000 % 60,10)
  if (seconds < 10) {
  seconds = '0' + seconds
  }
  return { bool,seconds }
  }

componentWillUnmount() {
clearTimeout(this.timer)
}

render() {
let { bool,seconds } = this.state
return (

) } }