微信小程序实现多行文字滚动

swiper-item {
 height: 100%;
}

//index.js
//获取应用实例
import api from "../../utils/api.js"
var token = ''
const app = getApp()

Page({
 data: {
 topnewslist:[]
 },
 onLoad: function () {
 },
 tonewsdetail(e){
 var newsid=e.currentTarget.dataset.newsid;
 wx.navigateTo({
  url: '/pages/newsdetail/newsdetail&＃63;newsid='+newsid,
 })
 },

 loadscrollnews(){
 api.get("mpapi/mpmnews.ashx", { action:'toplist',token:token}).then((res)=>{
  if(res.code==1){
  //res.list=[{"new_id":1,"new_topic":"111"},{"new_id":2,"new_topic":"222"},{"new_id":3,"new_topic":"333"},{"new_id":4,"new_topic":"444"}]
  this.setData({
   topnewslist: this.splitArr(res.list, 2) //调用
   //调用之后[[{"new_id":1,"new_topic":"111"},{"new_id":2,"new_topic":"222"}],[{"new_id":3,"new_topic":"333"},{"new_id":4,"new_topic":"444"}]]
  })
  }
 })
 },
 /**
 * 分割数组创建二维数组封装
 * @param data 数组
 * @param senArrLen 需要分割成子数组的长度
 */
 splitArr(data, senArrLen){
 //处理成len个一组的数据
 let data_len = data.length;
 let arrOuter_len = data_len % senArrLen === 0 &＃63; data_len / senArrLen : parseInt((data_len / senArrLen) + '') + 1;
 let arrSec_len = data_len > senArrLen &＃63; senArrLen : data_len;//内层数组的长度
 let arrOuter = new Array(arrOuter_len);//最外层数组
 let arrOuter_index = 0;//外层数组的子元素下标
 // console.log(data_len % len);
 for (let i = 0; i