54 lines
1.4 KiB
JavaScript
54 lines
1.4 KiB
JavaScript
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/**
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* coolui-scroller组件的api使用
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* 提供wx.createScrollContext进行管理功能
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*/
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function observePage(pageIndex, that) {
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wx.getSystemInfoAsync({
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success: (res) => {
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const { windowHeight } = res
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// this.windowHeight = windowHeight
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const observerObj = wx
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.createIntersectionObserver(that)
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.relativeToViewport({
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top: 2 * windowHeight,
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bottom: 2 * windowHeight,
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})
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observerObj.observe(`#wrp_${pageIndex}`, (res) => {
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if (res.intersectionRatio <= 0) {
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try {
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that.setData({
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['list[' + pageIndex + ']']: [
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{
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height: that.pageHeightArr[pageIndex],
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},
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],
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})
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} catch (error) {
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console.log(error)
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}
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} else {
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try {
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that.setData({
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['list[' + pageIndex + ']']: that.wholeList[pageIndex],
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})
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} catch (error) {
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console.log(error)
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}
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}
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})
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},
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})
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}
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function setHeight(that) {
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const page = that.param.page
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this.query = wx.createSelectorQuery()
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this.query.select(`#wrp_${page}`).boundingClientRect()
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this.query.exec(function (res) {
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that.pageHeightArr[page] = res[0] && res[0].height
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})
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observePage(page, that)
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}
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module.exports.setHeight = setHeight
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