微信小程序文字滚动marquee

Posted 2021-12-23 ximishuier

 data: 
      text: "如果预约时间不能到店则需要提前两个小时取消预约，如不足两个小时可联系技师取消预约",
        marqueePace: 0.5,//滚动速度
        marqueeDistance: 0,//初始滚动距离
        marquee_margin: 0,
        size:28,
        interval: 20 // 时间间隔
  ,

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
        //console.log(length,windowWidth);
        that.setData(
         length: length,
         windowWidth: windowWidth
        );
        that.scrolltxt();// 第一个字消失后立即从右边出现
 ,
  
 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
         
 ,

<view class="pad_25">
    <view class=" dis_f ali_ct">
        <view><image src="/images/laba_wode.png" class="dis_b laba_img_w" /></view>
        <view class="clr_g flex1" >
            <scroll-view  >
                 <view class="scrolltxt clr_g">
                  <view class="marquee_box">
                   <view class="marquee_text" style="transform: translateX(-marqueeDistancepx)">
                    <text class="clr_g">text</text>
                    <text style="margin-right:marquee_marginpx;"  class="clr_g"></text>
                    <text style="margin-right:marquee_marginpx;" class="clr_g">text</text>    
                   </view>
                  </view>
                 </view>
            </scroll-view>
        </view>

    </view>
</view>

.scrolltxtpadding: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:28rpx;height:90rpx;line-height:90rpx;

效果