class Index { constructor () { this.index = 0; this.principal = [] //定义两个全局变量下标和数组 footer(); //调用底部菜单 this.getClassList() //调用 } //调用 getClassList接口 async getClassList() { var self = this; var res = await indexServe.classList(); console.log(res); this.principal = res.principal this.principal.forEach((v,i) => { $(".header_menu ul").html(`
  • ${v.title}
  • `) //对this.principal 进行遍历 向.header_menu ul里面添加li li的数据就是v.title $(".page_wrapper").html(`
    `); //向page_wrapper添加swiper-slide(也就是父容器) _(".swiper-wrapper .swiper-slide").forEach(v => { v.onscroll = () => { const {clientHeight, scrollHeight, scrollTop} = v; const distance = scrollHeight- scrollTop - clientHeight; if(distance <= 0) { // 首页 console.log("滚动到底部..."); if (this.index == 0) { this.getIndex() } else { this.principal[this.index].page += 1 if (this.principal[this.index].page <= this.principal[this.index].total_page) { this.getClassListArr("more") } else { console.log("已经没有数据了!!!"); } } } } }) }) click($('.header_menu i'), function () { console.log(this); }) click(_(".header_menu ul li"), function () { self.changeActive(this.index) }) this.getIndex() this.initPage() } //点击分类的方法 async getClassListArr(type = "click") { var getData = async () => { var res = await indexServe.classListArr({ page: this.principal[this.index].page, id: this.principal[this.index].id //数组的参数通过数组加下标的方式拿到 }); this.principal[this.index].total_page = res.total_page //为数组里面添加个总页面total_page this.principal[this.index].content = [ ...this.principal[this.index].content, ...res.data //向content添加数组以及返回的新数组 ]; item( _(".swiper-slide .list")[this.index], // this.principal[this.index].content res.data ) //调用item父元素加数据 } if (type == "click") { if (this.principal[this.index].id != -1) //如果数组中id不等于负一也就是不是首页 { if (this.principal[this.index].content.length == 0) //并且数组为0时 { getData() //请求数据 } } } else { getData() } } //更改activ样式 changeActive(index) { this.index = index _(".header_menu ul li").forEach(v => v.remove("active")) // 对.header_menu ul li进行遍历先删除所有的active _(".header_menu ul li")[index].add("active") // 再通过数据加下标的方式给添加active this.mySwiper.slideTo(index) //点击时页面跟着标题一起切换 必要参数为下标(index) } //调用index接口 async getIndex() { var res = await indexServe.index(); this.principal[this.index].content = [ //数组加下标的方式存入数据组中的content ...this.principal[this.index].content, ...res.list //...是指将数组中的元素都取出来 ]; item(_(".swiper-slide .list")[this.index], res.list) } //页面轮播图 initPage() { var self = this; //提前定义一个this this.mySwiper = new Swiper('.swiper-container', { //定义一个mySwiper 加了this为全局变量 direction: 'horizontal', //切换水平滑动 on:{ slideNextTransitionEnd: function() { //监听是否滑动结束 self.changeActive(this.activeIndex) //获取当前的滑动后的下标 self.getClassListArr() }, }, }) } } new Index()