本文实例为大家分享了微信小程序实现文字跑马灯 的具体代码，供大家参考，具体内容如下效果如图WXML




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WXSS
.container {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;}
.container {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;}JS
data: {
//滚动字幕
text: "温馨提示：为了保证其他购买者的利益，每个 账号针对同一商品只允许退款一次，请您谨慎操作。",
marqueePace: 1,//滚动速度
marqueeDistance: 0,//初始滚动距离
marquee_margin: 30,//间距
size: 14,//字号
time: '',// 定时器
},

onHide: function () {
//清空滚动字幕定时器，避免锁屏或页面隐藏后移动速度越来越快
clearInterval(this.data.time);
},

onShow: function (e) {
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
},

/**
* 滚动字幕
*/
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
var time = this.data.time
if (length > windowWidth) {
time = 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 {

that.setData({

marqueeDistance: 0 // 直接重新滚动

});

clearInterval(time);

that.scrolltxt();
}
}, 20);
}
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
}
that.setData({
time:time
})
},
data: {
//滚动字幕
text: "温馨提示：为了保证其他购买者的利益，每个 账号针对同一商品只允许退款一次，请您谨慎操作。",
marqueePace: 1,//滚动速度
marqueeDistance: 0,//初始滚动距离
marquee_margin: 30,//间距
size: 14,//字号
time: '',// 定时器
},

onHide: function () {
//清空滚动字幕定时器，避免锁屏或页面隐藏后移动速度越来越快
clearInterval(this.data.time);
},

onShow: function (e) {
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
},

/**
* 滚动字幕
*/
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
var time = this.data.time
if (length > windowWidth) {
time = 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 {

that.setData({

marqueeDistance: 0 // 直接重新滚动

});

clearInterval(time);

that.scrolltxt();
}
}, 20);
}
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
}
that.setData({
time:time
})
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