<div id="example">
  <button @click="send">
   <span v-if="sendMsgDisabled">{{time+'秒后获取'}}</span>
   <span v-if="!sendMsgDisabled">send</span>
  </button>
</div>

var vm = new Vue({
  el: '#example',
  data() {
   return {
    time: 60, // 发送验证码倒计时
    sendMsgDisabled: false
   }
  },
  methods: {
   send() {
    let me = this;
    me.sendMsgDisabled = true;
    let interval = window.setInterval(function() {
     if ((me.time--) <= 0) {
      me.time = 60;
      me.sendMsgDisabled = false;
      window.clearInterval(interval); //停止
     }
    }, 1000);
   }
  }
 }) 

<button type="button" @click='delusercache()' :disabled="sendMsgDisabled" v-text="btnText"></button>
//倒计时按钮禁用:disabled="sendMsgDisabled

var vm = new Vue({
  el: '#example',
  data() {
   return {
    time: 60, // 发送验证码倒计时
    sendMsgDisabled: false //按钮可用
   }
  },
  methods: {
   time(){
      this.sendMsgDisabled= true; //按钮不可用
      let interval = window.setInterval(()=> {
        this.btnText = this.time + 's重新发送'
        if ((this.time--) <= 0) {
          this.time = 120;
          this.btnText ='发送验证码'
          this.sendMsgDisabled= false; //按钮可用
          window.clearInterval(interval);
        }
      }, 1000);
    }
 }) 

time = () => {
    this.setState({ 
      times: this.state.times-1,
      btnText: '' + this.state.times + 's重新发送)',
      // discodeBtn: false,
      clearInterval:true
    })
    var siv = setInterval(() => {
      this.setState({ 
        times: this.state.times-1,
        btnText: '' + this.state.times + 's重新发送)',
        // discodeBtn: false,
        clearInterval:true
      }, () => {
        if (this.state.times === 0) {
          clearInterval(siv);
          this.setState({ 
            times: 60,
            btnText: '发送验证码', 
            // discodeBtn: true,
            clearInterval:false,
            phone:false,
            isDisabled:false
          })
        }
      });
    }, 1000);
  };
<button 
className={(this.state.clearInterval ? 'send-btn-disabled-m' : 'send-btn-default')} 
disabled={this.state.isDisabled} 
onClick={this.getPhone} >
{this.state.btnText}
</button>