xiaoshi-wx/node_modules/wux-weapp/example/pages/virtual-list/scroll-view.js

let itemCount = 100
let items = [...new Array(itemCount)].map((v, i) => i)

import ad from '../index/ad'

ad({
    data: {
        disableScroll: false,
        height: 300,
        itemHeight: 50,
        itemBuffer: 30,
        scrollToIndex: 0,
        scrollWithAnimation: false,
    },
    onLoad() {
        this.updated(items)
    },
    updated(items) {
        const startTime = Date.now()
        this.virtualList = this.virtualList || this.selectComponent('#wux-virtual-list')
        this.virtualList.render(items, () => {
            const diffTime = Date.now() - startTime
            console.log(`onSuccess - render time: ${diffTime}ms`)
        })
    },
    loadData(e) {
        if (itemCount >= 1000) return
        if (this.data.disableScroll) return
        this.setData({ disableScroll: true })
        wx.showLoading()
        setTimeout(() => {
            itemCount += 100
            items = [...new Array(itemCount)].map((v, i) => i)
            this.updated(items)
            this.setData({ disableScroll: false })
            wx.hideLoading()
        }, 3000)
        console.log('loadData', e.detail)
    },
    onChange(e) {
        const { startIndex, endIndex } = e.detail
        if (this.data.startIndex !== startIndex || this.data.endIndex !== endIndex) {
            this.setData(e.detail)
            console.log('onChange', e.detail)
        }
    },
    onScrollToLower(e) {
        this.loadData(e)
        console.log('onScrollToLower', e)
    },
    onInputBlur(e) {
        const { meta } = e.currentTarget.dataset
        this.setData({ [meta]: e.detail.value })
        console.log('onInputBlur', e)
    },
    onSwicth(e) {
        const { meta } = e.currentTarget.dataset
        this.setData({ [meta]: e.detail.value })
        console.log('onSwicth', e)
    },
})