uni-app实现星级评价

<view class="stars-wrapper">
            <view v-for="n in 5" @mouseenter="enter(n)" @mouseleave="leave()" @click="Selected(n)" :class="{'on':cur>=n}"</view>
</view>

<script>
    export default {
        data() {
            return {
                cur : 5,
                flag : false //鼠标点击后变成true，鼠标进入进出事件就不会改变背景图
            };
        },
        onShow() {
            document.title='评价晒单'
        },
        methods : {
            enter(idx){
                if(!this.flag){
                    this.cur = idx;
                }
                console.log(idx);
            },
            leave(){
                if(!this.flag){
                    this.cur = -1;
                }
            },
            Selected(n){
                this.flag = true;
                this.cur = n;
            }
        }
    }
</script>

<style>

.stars-wrapper view{
    width: 38upx;
    height: 38upx;
    background-image: url('data:image/png;base64,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');
    background-repeat:no-repeat;
    background-size:100% 100%;
    margin-right: 30upx;
}
.stars-wrapper .on{
    background-image: url('data:image/png;base64,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');
}

</style>