uniapp で色をラベルにバインドする方法

html:<text @tap="changeColor" class="testOne" :style="{color:current}">点击连续改变颜色</text>
js:
changeColor() {
if(this.isClick){
return
}
this.isClick = true
let selectorQuery = uni.createSelectorQuery()
let abc = selectorQuery.select(&#39;.testOne&#39;)
let that = this
        setInterval(function() {
                let first = Math.round(Math.random() * 255);
                let second = Math.round(Math.random() * 255);
                let third = Math.round(Math.random() * 255);
                let color = `rgba(${first},${second},${third},1)`//注意这里是模板字符串``
                that.current = color
        }, 500)
    }