ele UI 的树级菜单的数据要求是这种嵌套的,但是Ztree的老用发的是

var zNodes =[            { id:1, pId:0, name:"zTree Home", pid:0},            { id:2, pId:0, name:"zTree in Google",pid:0}, 　　　　　　 { id:3, pId:0, name:"zTree in Iteye",pid:1}]

这种以pid来识别父级关系的,话不多说转换

//将数组转成嵌套的                buildTree (arr) {                    let temp = {}                    let tree = {}                    // 数组转 键值对                    arr.forEach(item => {                        temp[item.id] = item                    })                    let tempKeys = Object.keys(temp)                    tempKeys.forEach(key => {                        // 获取当前项                        let item = temp[key]                        // 当前项 pId                        let _itemPId = item.pid                        // 获取父级项                        let parentItemByPid = temp[_itemPId]                        if (parentItemByPid) {                            if (!parentItemByPid.children) {                                parentItemByPid.children = []                            }                            parentItemByPid.children.push(item)                        } else {                            tree[item.id] = item                        }                    })                    // 对象转数组并返回                    return Object.keys(tree).map(key => tree[key])                },

 

 

 

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