view监听scroll事件，返回的值没有滚动条的信息。

<template>  
    <view ref="nzScroll" :style="{height: scrollHeight+'px'}" class="nz-scroll"  @scroll="handleScroll($event)">  
        <slot></slot>  
    </view>  
</template>  

<script>  
    export default {  
        name: 'nz-scroll',  
        props: {  
            height: {  
                type: Number,  
                default: 0  
            }  
        },  
        data() {  
            return {  
                scrollHeight: this.height,  
                nzScroll: null  
            }  
        },  
        methods: {  
            handleScroll(event) {  
                console.log(event);  
            }  
        },  
        mounted() {  
            this.nzScroll = this.$refs.nzScroll;  
            console.log(this.nzScroll);  
        }  
    }  
</script>  

<style lang="scss">  
    .nz-scroll {  
        overflow-y: scroll;  
    }  
</style>