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编码猿
2024-09-27 02:06:13 +08:00
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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) => {
$(".header_menu ul").html(`
<li class="${i == 0 ? 'active' : ''}">${v.title}</li>
`) //对this.principal 进行遍历 向.header_menu ul里面添加li li的数据就是v.title
$(".page_wrapper").html(`
<div class="swiper-slide">
<div class="list">
</div>
</div>
`); //向page_wrapper添加swiper-slide(也就是父容器)
_(".swiper-wrapper .swiper-slide").forEach(v => {
v.onscroll = () => {
const {clientHeight, scrollHeight, scrollTop} = v;
const distance = scrollHeight- scrollTop - clientHeight;
if(distance <= 0) {
// 首页
console.log("滚动到底部...");
if (this.index == 0) {
this.getIndex()
} else {
this.principal[this.index].page += 1
if (this.principal[this.index].page <= this.principal[this.index].total_page) {
this.getClassListArr("more")
} else {
console.log("已经没有数据了!!!");
}
}
}
}
})
})
click($('.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()