wxml代码如下

<cover-view class="container_box"  wx:if="{{!bikeRiding.show}}">

<cover-view class="container">

<cover-view class="marquee_box" style="color:red">

<cover-view class="marquee_text" style="transform: translateX(-{{marqueeDistance}}px)">

<cover-view>{{text}}</cover-view>    

</cover-view>

</cover-view>

</cover-view>

</cover-view>  

WXSS代码如下

.container_box{

width: 100%;

height: 70rpx;

background: #FFF1DC;

}

.container {

height: 70rpx;

line-height:70rpx;  

margin: 0 auto;

width: 90%;

font-size: 30rpx;    

}

.marquee_box {

position:relative;

color:#F1513C;

height:70rpx;

overflow:hidden;

}

.marquee_text {

white-space: nowrap;

position:absolute;

top:0;    

height:70rpx;

line-height:70rpx;  

padding-top:16rpx;  

}  

js代码如下

Page({

    data: {

    // 跑马灯代码开始

    text: "骑行前请注意查看地图中的可骑行范围，超出范围将扣除搬运费，详情请见用车主页面《用车说        明》！！！",

    marqueePace: 1,//滚动速度

    marqueeDistance: 0,//初始滚动距离

    marquee_margin: 30,

    size: 14,

    interval: 20, // 时间间隔

}）

scrolltxt: function () {

    var that = this;

    var length = that.data.length;//滚动文字的宽度

    var windowWidth = that.data.windowWidth;//屏幕宽度

    if (length > windowWidth) {

        var interval = setInterval(function () {

            var maxscrollwidth = length + that.data.marquee_margin;//滚动的最大宽度，文字宽度+间距，如果需要一行文字滚完后再显示第二行可以修改marquee_margin值等于windowWidth即可

            var crentleft = that.data.marqueeDistance;

    if (crentleft < maxscrollwidth) {//判断是否滚动到最大宽度

            that.setData({

            marqueeDistance: crentleft + that.data.marqueePace

    })

   }else {

    //console.log("替换");

    that.setData({

    marqueeDistance: 0 // 直接重新滚动

    });

    clearInterval(interval);

    that.scrolltxt();

    }

    }, that.data.interval);

    }

    else {

    that.setData({ marquee_margin: "1000" });//只显示一条不滚动右边间距加大，防止重复显示

    }

    },

    onShow: function () {

        var that = this

        var length = that.data.text.length * that.data.size;//文字长度

        var windowWidth = wx.getSystemInfoSync().windowWidth;// 屏幕宽度

        that.setData({

            length: length,

            windowWidth: windowWidth

        });

        that.scrolltxt();// 文字消失后立即从右边出现

}