本文实例为大家分享了微信小程序scroll-view实现自定义滚动条的具体代码，供大家参考，具体内容如下
html
<!-- 九宫格 -->
<scroll-view class="my-grid" scroll-x="true" bindscroll="getleft">
<view class="grid-item" wx:for="{{gridlist}}" wx:key="index">
<text>{{item.name}}</text>
</view>
</scroll-view>
<!--滚动条部分-->
<view class="slide">
<view class='slide-bar' >
<view class="slide-show" style="width:{{slideWidth}}rpx; margin-left:{{slideLeft<=1 ? 0 : slideLeft+'rpx'}};"></view>
</view>
</view>
js
Page({
data: {
slideWidth:'',//滑块宽
slideLeft:0 ,//滑块位置
slideRatio:'',
windowWidth:'',
gridlist:[
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
{name:'家乐福'},
]
},
onLoad: function() {
var self = this ;
var systemInfo = wx.getSystemInfoSync() ;
self.setData({
windowWidth:systemInfo.windowWidth
});
self.getRatio();
},
//根据分类获取比例
getRatio(){
var self = this ;
var _totalLength = self.data.gridlist.length * 150; //分类列表总长度
var _ratio = 230 / _totalLength * (750 / this.data.windowWidth); //滚动列表长度与滑条长度比例
var _showLength = 750 / _totalLength * 230; //当前显示红色滑条的长度(保留两位小数)
console.log(_totalLength,_ratio,_showLength)
this.setData({
slideWidth: _showLength,
totalLength: _totalLength,
slideRatio:_ratio
})
} ,
getleft:function(e){
this.setData({
slideLeft: e.detail.scrollLeft * this.data.slideRatio
})
},
})
css
/* 九宫格样式 */
.my-grid{
width: 100%;
height: 220rpx;
background-color: #00bfff;
white-space: nowrap;
}
.my-grid .grid-item{
width:150rpx;
text-align:center;
display:inline-block;
height:115rpx;
}
.slide{
height:30rpx;
background:#fff;
width:100%;
padding:14rpx 0 5rpx 0
}
.slide .slide-bar{
width:230rpx;
margin:0 auto;
height:1.5px;
background:#eee;
}
.slide .slide-bar .slide-show{
height:100%;
background-color:#ff6969;
}
