<scroll-view class="container"> <view class="scrolltxt">  <view class="marquee_box">   <view class="marquee_text" style="transform: translateX(-{{marqueeDistance}}px)">    <text>{{text}}</text>    <text style="margin-right:{{marquee_margin}}px;"></text>    <text style="margin-right:{{marquee_margin}}px;">{{text}}</text>       </view>  </view> </view></scroll-view>

.container {height: 100%;display: flex;flex-direction: column;justify-content: space-between;box-sizing: border-box;}.scrolltxt{padding:0 20rpx;background:#f8f8f8;}.marquee_box {position:relative;color:#333;height:90rpx;display:block;overflow:hidden;} .marquee_text {white-space: nowrap;position:absolute;top:0;font-size:14px;height:90rpx;line-height:90rpx;}

Page({ /**  * 頁面的初始數(shù)據(jù)  * Linyufan.com  */ data: {  text: "這是一條測試公告，看看效果怎么樣，2019年3月23日",  marqueePace: 1,//滾動速度  marqueeDistance: 0,//初始滾動距離  marquee_margin: 30,  size:14,  interval: 20 // 時間間隔 },  /**  * 生命周期函數(shù)--監(jiān)聽頁面加載  */ onLoad: function (options) {  }, onShow: function () {  var that = this;  var length = that.data.text.length * that.data.size;//文字長度  var windowWidth = wx.getSystemInfoSync().windowWidth;// 屏幕寬度  //console.log(length,windowWidth);  that.setData({   length: length,   windowWidth: windowWidth  });  that.scrolltxt();// 第一個字消失后立即從右邊出現(xiàn) },  scrolltxt: function () {  var that = this;  var length = that.data.length;//滾動文字的寬度  var windowWidth = that.data.windowWidth;//屏幕寬度  if (length > windowWidth){   var interval = setInterval(function () {    var maxscrollwidth = length + that.data.marquee_margin;//滾動的最大寬度，文字寬度+間距，如果需要一行文字滾完后再顯示第二行可以修改marquee_margin值等于windowWidth即可    var crentleft = that.data.marqueeDistance;    if (crentleft < maxscrollwidth) {//判斷是否滾動到最大寬度     that.setData({      marqueeDistance: crentleft + that.data.marqueePace     })    }    else {     //console.log("替換");     that.setData({      marqueeDistance: 0 // 直接重新滾動     });     clearInterval(interval);     that.scrolltxt();    }   }, that.data.interval);  }  else{   that.setData({ marquee_margin:"1000"});//只顯示一條不滾動右邊間距加大，防止重復(fù)顯示  }  }})