React中发送验证码，倒计时
render （） {
return (
<label>验 证 码：</label>
<div className="flexBetween">
<Input type="text" className="code-input" value={code} onChange={this.onChange.bind(this, 'code')} placeholder="请输入" autoComplete="off" />
<Button type="primary" className="code-btn" onClick={this.onChange.bind(this, 'sendCode')}>
{ isSend ? count + 's' : '发送验证码'}
</Button>
</div>
)
}
this.state = {
isSend: false,
count: 60,
}
onChange(key, value) {
const { tell } = this.state
if (key === 'sendCode') {
this.setInterval()
}
} setInterval = () => {
this.timer = setInterval(this.countDown, 1000)
}
countDown = () => {
const { count } = this.state
if (count === 1) {
this.clearInterval()
this.setState({ isSend: false, count: 60 })
} else {
this.setState({ isSend: true, count: count - 1 })
}
}
clearInterval = () => {
clearInterval(this.timer)
}
