通过tree树形控件的default-checked-keys属性来设置默认选中的节点
html.vue
<el-form-item label="角色权限:">
<el-tree :data="data2"
show-checkbox
node-key="id"
@check="handleNodeClick"
:default-expanded-keys="[]"
ref="tree"
:default-checked-keys="default_select"
:props="defaultProps">
</el-tree>
</el-form-item>
html.js
data() {
return {
data2: [],
defaultProps: {
children: 'child',
label: 'name'
},
menu_ids: [],
// 默认选中
default_select: [],
role_id: 0,
}
},
methods: {
/**
* 获取详情
*/
getDetail() {
let that = this;
that.$http.post(that.adminApi.api_url + "/Role/show_edit", {
token: that.token,
role_id: that.role_id
}, {
emulateJSON: true
}).then(
function (res) {
var data = res.body;
if (data) {
that.ruleForm.name = data.name;
that.ruleForm.sort = data.sort;
that.ruleForm.status = data.status.toString();
/**重点开始*/
if(typeof (data.menu_id) == 'object'){
//转数组
data.menu_id = Object.keys(data.menu_id).map(key=> data.menu_id[key]);
}
//赋值
data.menu_id.forEach((value)=>{
that.default_select.push(value);
});
setTimeout(function () {
that.default_select.forEach((value)=>{
that.$refs.tree.setChecked(value,true,false)
});
},100);
that.menu_ids = data.menu_id;
/**重点结束*/
}
});
},
/**
* 属性控件
*/
handleNodeClick(e, data) {
console.log(data);
console.log(e);
this.menu_ids = data.checkedKeys
},
}
总结,Tree树形控件通过后台接口获取到数组数据,还需要再次遍历,将它再遍历为数组,这样我们才可以调用,如果直接从后台获取到数组来调用的时候,我们是获取不到这个数组中的内容。