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微信小程序短文字居中，长文字跑马灯效果
发布时间:2020-11-05
Html代码
<view class="info_box_happy"> <view class="info_box_happy_txt" style="width: {{textW}}px;margin-left: {{textL}}px">{{textN}}view> view>Css代码
.info_box_happy{ font-size: 12px; color: #333; white-space : nowrap; padding: 10rpx 3rpx; background: #fff; border-bottom: 2rpx #f5f5f5 solid; position: relative; overflow: hidden; width: 100%; } .info_box_happy_txt{ color: red; width: 100%; position: relative; }Js代码
page{ textM:0, textN:'元旦快乐！元旦快乐！元旦快乐！元旦快乐！', textW:0, textL:50, } onLoad: function (options) { var that = this; var textM = 20; //获取屏幕宽度的封装方法 var phoneWidth = util.nowPhoneWH()[0]; //文字宽度=文字长度+字体大小 var textW = parseInt(Number(that.data.textN.length)*12); that.setData({textW:textW,textL:phoneWidth}); if(phoneWidth>textW){ var centerL = Number(phoneWidth/2)-(Number(textW)/2) that.setData({textL:centerL}); }else{ var textTime = setInterval(function(){ var textL = that.data.textL; if(textL<-(textW-20)){ that.setData({textL:phoneWidth}) return } textL-=2; that.setData({textL:textL}) },30) } },