微信小程序实现滚动条功能
本文实例为大家分享了微信小程序实现滚动条的具体代码，供大家参考，具体内容如下
view
<view class="conty">
<!-- 滚动字幕 -->
<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>
</view>
js
data: {
text: "这是一条农协动态，请您仔细阅读，若内容有所问题，请联系客服！",
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
HomeIndex:0,
},
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
}
}
css
.scrolltxt{
width: 100%;
padding:0 20rpx;
background:#2a4d69;
}
.marquee_box {
position:relative;
color:white;
height:90rpx;display:
block;overflow:hidden;
}
.marquee_text {
white-space: nowrap;
position:absolute;
top:0;
font-size:14px;
height:90rpx;
line-height:90rpx;
}
