JS获取验证码倒计时

data() {
            return {
                phone:'',
                code:'',
                time:0,
                timer:{},
                codeName:'获取验证码'
            }
},

mounted(){
    var getCodeTime = uni.getStorageSync('getCodeTime') ?         
uni.getStorageSync('getCodeTime') : 0;//页面初始化
            if (getCodeTime > 0) {
                this.timeCount(getCodeTime)
            }
}

methods: {

            timeCount(time){//倒计时
                uni.setStorageSync('isGetCode',1)
                clearInterval(this.timer);
                var set_time = 20;
                this.timer = setInterval(()=>{
                    this.time = set_time - time
                    uni.setStorageSync('getCodeTime',this.time)
                    this.codeName = this.time + '秒'
                    time++;
                    if (this.time <= 1) {
                        this.codeName = '获取验证码'
                        uni.setStorageSync('isGetCode',0)
                        uni.setStorageSync('getCodeTime',0)
                        clearInterval(this.timer);
                    }
                },1000);
            },

            clearTime(){//确认后 重置验证码
                uni.setStorageSync('isGetCode',0)
                uni.setStorageSync('getCodeTime',0)
                this.time = 0;
                clearInterval(this.timer);
            },

            isTime(){//获取验证码
                var isGetCode = uni.getStorageSync('isGetCode') ? uni.getStorageSync('isGetCode') : 0;
                var getCodeTime = uni.getStorageSync('getCodeTime') ? uni.getStorageSync('getCodeTime') : 0;

                if (isGetCode == 0 || getCodeTime == 0) {//获取验证码
                    var flag = this.isPhone(this.phone);
                    if (!flag) {
                        uni.showToast({title:'手机号格式错误！',icon:'none'})
                        return false;
                    }

                    this.$api.urlXXX({phone:this.phone}).then((res)=>{
                        if (res.success) {
                            this.timeCount(getCodeTime);
                            uni.showToast({title:'验证码获取成功！',icon:'none'})
                        } else {
                            uni.showToast({title:res.message,icon:'none'})
                            return false;
                        }
                    });

                } else {

                }
            },
            confirm(){//确定

                if (this.isConfirm) {
                    var flag = this.isPhone(this.phone);
                    if (!flag) {
                        uni.showToast({title:'手机号格式错误！',icon:'none'})
                        return false;
                    }
                    if (this.code.length < 4) {
                        uni.showToast({title:'验证码错误！',icon:'none'})
                        return false;
                    }
                }
            },
            isPhone(str) {
                var myreg=/^[1][3,4,5,6,7,8,9][0-9]{9}$/;
                if (!myreg.test(str)) {
                    return false;
                } else {
                    return true;
                }
            }
            
        },