实现结果：
直接上代码：
javascript
<template>
<div>
<div class="tops">
<el-tree :default-expanded-keys="['1']" ref="myTree" :data="data" :props="defaultProps" @node-click="handleNodeClick" highlight-current node-key="value">
<span class="custom-tree-node" slot-scope="{ node, data }">
<i v-if="node.level == 1" class="father" />
<i v-else-if="node.level == 2" class="son" />
<i v-else-if="node.level == 3" />
{{ data.label }}
</span>
</el-tree>
</div>
</div>
</template>
<script>
let that=this
export default {
data() {
return {
data: [
{
label: '1号生活区',
value:'1',
isShow:true,//当前折叠部分是否打开
children: [
{
label: '1号楼',
value:'1-1',
},
{
label: '2号楼',
value:'1-2',
},
{
label: '3号楼',
value:'1-3',
},
{
label: '4号楼',
value:'1-4',
},
]
},
{
label: '2号生活区',
value:'2',
isShow:false,
children: [
{
label: '1号楼',
value:'2-1',
},
{
label: '2号楼',
value:'2-2'
},
]
},
{
label: '3号生活区',
value:'3',
isShow:false,
children: [
{
label: '1号楼',
value:'3-1',
},
{
label: '2号楼',
value:'3-2',
},
{
label: '3号楼',
value:'3-3',
},
]
},
{
label: '4号生活区',
value:'4',
isShow:false,
children: [
{
label: '1号楼',
value:'4-1',
},
{
label: '2号楼',
value:'4-2',
},
{
label: '3号楼',
value:'4-3',
},
]
}
],
defaultProps: {
children: 'children',
label: 'label'
},
value1: '',
value2:'',
};
},
methods: {
handleNodeClick(data) {
this.$emit('treesVal',data)
},
},
mounted () {
this.$nextTick(function () {
this.$nextTick(() => {
// myTree 数组件的ref 默认让第一项高亮
// data是树组件对应的数据
// 通过data中的第一项的id找到对应的节点，然后把这个节点设置为高亮
this.$refs.myTree.setCurrentKey(this.data[0].value)
});
});
},
};
</script>
<style lang="scss" scoped>
@import '@/style/util.scss';
.tops{
width: vw(260);
height: 100%;
background-color: #fff;
margin: 0 auto;
padding:0 vw(8);
box-shadow: 0 vw(2) vw(10) 0 rgba(0,5,10,0.1);
//设置行高
>>>.el-tree-node__content{
position: relative;
height: vh(52);
box-sizing: border-box;
}
//小三角的位置 以及默认时候的位置
>>>.el-tree-node__expand-icon{
webkit-transform:rotate(-90deg);
transform: rotate(-90deg);
user-select: none;
position: absolute;
top: vh(8);
right: 0;
}
//小三角点击展开时候旋转的角度
>>>.el-tree-node__expand-icon.expanded{
webkit-transform:rotate(90deg);
transform: rotate(90deg);
user-select: none;
}
//插入的父级的图标的样式
.father {
background: url('../assets/img/flower-wxz.png') no-repeat;
width: vw(18);
height: vw(18);
display: inline-block;
background-size: 100% 100%;
// margin-left: vw(20) !important;
margin: 0 vw(8) 0 vw(20) !important;
}
//插入的自己的图标样式
.son {
width: vw(4);
height: vw(4);
border-radius: 50%;
background: #666666;
display: inline-block;
background-size: 100% 100%;
margin: 0 vw(8) vh(3) vw(35) !important;
}
//有子节点 且未展开 小三角
.el-tree /deep/ .el-icon-caret-right:before {
color: #858585;
font-weight: 600;
}
//有子节点 且已展开 小三角
.el-tree /deep/ .el-tree-node__expand-icon.expanded.el-icon-caret-right:before {
color: #4F8BE2 !important;
font-weight: 600;
}
//没有子节点 小三角
.el-tree /deep/.el-tree-node__expand-icon.is-leaf::before {
content: "";
display: block;
font-weight: 600;
width: vw(12);
height: vw(12);
font-size: vw(16);
background-size: 100% 100%;
}
>>>.el-tree-node__content .custom-tree-node{
font-family: 'pfm';
font-size: vw(16);
color: #4e4e4e;
line-height: vh(52);
font-weight: 500;
user-select: none;
}
>>>.el-tree-node__children .el-tree-node .el-tree-node__content .custom-tree-node{
font-family: 'pf';
font-size: vw(16);
color: #666666;
line-height: vh(52);
font-weight: 500;
user-select: none;
}
>>>.el-tree-node__content {
border-left: vw(4) solid transparent;
}
//选中颜色
/deep/ .el-tree--highlight-current .el-tree-node.is-current > .el-tree-node__content {
background: #ECF4FF !important;
border-left: vw(4) solid #4F8BE2;
span{
color: #4F8BE2;
font-weight: 600;
}
.father {
background: url('../assets/img/flower-xz.png') no-repeat;
width: vw(18);
height: vw(18);
display: inline-block;
background-size: 100% 100%;
// margin-left: vw(20) !important;
margin: vh(-3) vw(8) 0 vw(20) !important;
}
.son {
width: vw(4);
height: vw(4);
border-radius: 50%;
background: #4F8BE2;
display: inline-block;
background-size: 100% 100%;
margin: 0 vw(8) vh(3) vw(35) !important;
}
}
}
</style>