微信小程序实现多行文字滚动

<view class="full" style="height:100%;overflow:hidden">
  <swiper autoplay="true" interval="3000" duration="500" circular="true" vertical="true" style="height:100%">
  <swiper-item wx:for="{{topnewslist}}" wx:key="{{index}}" catchtouchmove='catchTouchMove'>
   <van-notice-bar scrollable="{{false}}" bindtap="tonewsdetail" wx:for="{{item}}" wx:for-item="it" wx:key="{{index}}" data-newsid="{{it.new_id}}" style="width:100%" text="{{it.new_topic}}" />
  </swiper-item>
  </swiper>
</view>

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?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 ? data_len / senArrLen : parseInt((data_len / senArrLen) + '') + 1;
 let arrSec_len = data_len > senArrLen ? 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 < data_len; i++) {
  if (i % senArrLen === 0) {
  arrOuter_index++;
  let len = arrSec_len * arrOuter_index;
  //将内层数组的长度最小取决于数据长度对len取余，平时最内层由下面赋值决定
  arrOuter[arrOuter_index - 1] = new Array(data_len % senArrLen);
  if (arrOuter_index === arrOuter_len)//最后一组
   data_len % senArrLen === 0 ?
   len = data_len % senArrLen + senArrLen * arrOuter_index :
   len = data_len % senArrLen + senArrLen * (arrOuter_index - 1);
  let arrSec_index = 0;//第二层数组的索引
  for (let k = i; k < len; k++) {//第一层数组的开始取决于第二层数组长度*当前第一层的索引
   arrOuter[arrOuter_index - 1][arrSec_index] = data[k];
   arrSec_index++;
  }
  }
 }
 return arrOuter
 },
 // 截获竖向滑动
 catchTouchMove: function (res) {
 return false
 },
})