Sharing instructions:
The project needs to display the data returned by the background in the form of a tree view; and implement clicking on the node to add the node information to the ul on the right; wait for subsequent submissions to obtain and use; choose to be able to achieve asynchronous The zTree plug-in for loading node information has proven to be powerful enough to meet almost all needs. When I first came into contact with it, I read many people’s sharing and combined it with the official api documentation, I finally realized the function. Now I will share the summary of my learning. .
Effect introduction; In addition to the default effects of zTree, some practical operations are added using the API; including accordion effects; click on the parent node to expand the effect; click on the node text associated check box effect; display of the number of first-level child nodes Effect.
External resources introduced
1 <link rel="stylesheet" href="./zTree_v3-master/css/zTreeStyle/zTreeStyle.css">
2 <script type="text/javascript" src="./jquery-1.9.1.js"></script>
3 <script type="text/javascript" src="./zTree_v3-master/js/jquery.ztree.all.min.js"></script>
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html partial code
<div class="box">
<ul id="treeDemo" class="ztree"></ul>
<ul id="ulright">
<li style="text-align: center;background-color: #ddd;border-bottom: 1px dashed">已选择</li>
</ul>
</div>Copy after login
css code
ul,li,body{
margin: 0;
padding: 0;
}
.ztree li span.node_name {
font-size: 16px;
}
.box{
width: 500px;
margin:10px auto;
border:3px solid #ccc;
padding: 20px;
border-bottom: none;
}
#treeDemo{
width: 200px;
display: inline-block;
background-color: #f1f1f1;
min-height: 200px;
}
#ulright{
width: 200px;
margin-left: 50px;
min-height: 200px;
border:1px solid #ccc;
display: inline-block;
vertical-align: top;
background-color: #eeeee8;
}
#ulright li{
width: 100%;
height: 30px;
list-style: none;
line-height: 30px;
margin-bottom: 3px;
background-color: #00b6ba;
padding-left: 10px;
box-sizing: border-box;
}
/**/
.ztree li a.curSelectedNode{
background-color: transparent;
border:#00b6ba;
}
.ztree li span.node_name{
font-size: 18px;
line-height: 18px;
color: #000;
}
.ztree li a{
padding: 5px;
vertical-align: middle;
}
.ztree li a:hover{
text-decoration: none;
}
.ztree li span.button.chk{
margin: 9px 3px;
}Copy after login
js code
//递归找到所有节点(非父节点)
function getAllChildrenNodes(treeNode,result){
if (treeNode.isParent) {
var childrenNodes = treeNode.children;
if (childrenNodes) {
for (var i = 0; i < childrenNodes.length; i++) {
if(!childrenNodes[i].children){
result.push(childrenNodes[i].name);
}
result = getAllChildrenNodes(childrenNodes[i], result);
}
}
}
return result;
}
var parames = 3;
//zTree的所有配置
var setting = {
//zTree 的唯一标识，初始化后，等于 用户定义的 zTree 容器的 id 属性值。
treeId:"",
//zTree 容器的 jQuery 对象，主要功能：便于操作,内部参数,不可修改
treeObj:null,
//异步请求数据配置;当父节点没有子节点时;点击此父节点会触发请求
async:{
//打开此功能
enable: true,
url:"./zTreeDemoV9.0SimpleFromV10.0.php",
type:"post",
//发送的父级id的字段定义;如修改,遵循格式autoParam: ["id=parentId"]
autoParam: ["id"],
//其他需要提交的参数["name","topic","key","ss"]转换后格式为name=topic&key=ss
otherParam:["json",parames || 1,"test","2"],
dataType:"json",
contentType: "application/x-www-form-urlencoded",
//ajax请求后的数据预处理函数
dataFilter: function(treeId,parentNode,responseData){
for(var i=0;i<responseData.length;i++){
responseData[i] = JSON.parse(responseData[i])
}
return responseData;
}
},
//数据配置
data: {
simpleData: {
enable: true,
idKey: "id", //修改默认的ID为自己的id
pIdKey: "pid", //修改默认父级ID为自己数据的父级id
rootPId: 0 //根节点的父节点id
}
},
//视图配置
view: {
//是否显示节点前的图标
showIcon: false,
//节点上a标签的样式
fontCss: {
}
},
//选框配置
check: {
//启用复选框
enable: true,
//chkStyle:"radio"
//复选框父子级选择联动设置
chkboxType: { "Y": "ps", "N": "ps" }
},
//事件配置
callback: {
//点击复选框之前的事件
beforeCheck:function(treeId, treeNode){//如果节点是父节点,并且勾选时没有子节点,则不允许勾选;针对父节点没有展开,则没有异步加载子节点,此情况禁止点击父节点全选子节点的操作
if(treeNode.isParent && !treeNode.children){
return false;
}
},
//回调错误事件
onAsyncError: function(event, treeId, treeNode, XMLHttpRequest, textStatus, errorThrown){
alert("初始化节点数据失败,请稍后重试");
},
//回调成功事件
onAsyncSuccess: function(event, treeId, treeNode, resData){
var zTree = $.fn.zTree.getZTreeObj("treeDemo");
console.log("数据加载成功");
var count = (treeNode.children.length);
//加载成功后;在节点后面显示此父节点下有几个一级子节点
$(".ztree").find("a[title="+treeNode.name+"]").find("span[class='node_name']").html(treeNode.name+"<span>("+count+")</span>");
},
//父节点展开时的事件
onExpand: function(event, treeId, treeNode){
//zTree对象
var zTree = $.fn.zTree.getZTreeObj("treeDemo");
//获取点击的id
var nowId = treeNode.id;
//获取所有节点
var allNodes = zTree.getNodes();
//获取点击节点的层级
var level = treeNode.level;
//定义过滤函数;获取节点层级与点击节点层级相同并且为父节点的节点
function filter(node) {
return (node.level == treeNode.level && node.isParent);
}
//获得点击节点同级的父节点的集合
var sameLevelNodes = zTree.getNodesByFilter(filter);
//遍历同级节点集合
for(var i=0;i<sameLevelNodes.length;i++){
//将非被点击父节点收起;实现手风琴效果
if(sameLevelNodes[i].id != nowId){
zTree.expandNode(sameLevelNodes[i], false, true, true);
}
}
},
//点击事件
onClick: function(e, treeId, treeNode, clickFlag) {
//tree实例
var zTree = $.fn.zTree.getZTreeObj("treeDemo");
//点击文字关联复选框
//如果不是父节点,则关联,或者是父节点,但展开状态位true是,也关联;
if(!treeNode.isParent || (treeNode.isParent && treeNode.open)){
zTree.checkNode(treeNode, !treeNode.checked, true);//点击文字关联复选框
}
//点击文字展开当前节点
zTree.expandNode(treeNode, true, true, true);
// zTree.reAsyncChildNodes(treeNode, "refresh");//强行异步加载(存在子节点也进行加载)
//手风琴效果;直接调用onExpand
zTree.setting.callback.onExpand(e, treeId, treeNode);
//点击节点名称和勾选节点前面的复选框逻辑相同;
//直接在onClick里面调用onCheck函数;并传入所需参数
zTree.setting.callback.onCheck(e, treeId, treeNode);
},
//点击复选框事件
onCheck: function(e, treeId, treeNode) {
//获取右侧ul内所有li标签;用于比较当前选择复选框在右侧是否一斤存在
var rightLi = $("#ulright").find("li");
//选中的是底层节点;
if(!treeNode.isParent){
//选中状态,加入到右侧
if(treeNode.checked){
//遍历右侧li,如果选中的已经存在;return
for(var i=0;i<rightLi.length;i++){
if($(rightLi[i]).attr("title") == treeNode.name){
return;
}
}
// 创建li 追加li
var addLi = $("<li title="+treeNode.name+"><span></span>");
addLi.find("span").text(treeNode.name);
addLi.animate({
width:"100%",
height:"30"
},400)
addLi.appendTo($("#ulright"));
//如果点击的节点存在connect字段;判断复选框状态加入到右侧ul或删除
if(treeNode.connect){
//遍历右侧li,如果选中的已经存在;return
for(var i=0;i<rightLi.length;i++){
if($(rightLi[i]).attr("title") == treeNode.connect){
return;
}
}
// 创建li 追加li
var addLi = $("<li title="+treeNode.connect+"><span></span>");
addLi.find("span").text(treeNode.connect);
addLi.animate({
width:"100%",
height:"30"
},400)
addLi.appendTo($("#ulright"));
}
//将被勾选的节点背景颜色更改
$("#treeDemo").find("a[title="+treeNode.name+"]").css("backgroundColor","#00b6ba");
//非选中状态,删除
}else{
//将右侧的次节点对应的li删除
$("#ulright").find("li[title="+treeNode.name+"]").animate({
width:"0%",
height:"0"
},400,function(){
$("#ulright").find("li[title="+treeNode.name+"]").remove();
})
//取消此节点的背景颜色
$("#treeDemo").find("a[title="+treeNode.name+"]").css("backgroundColor","");
}
//选中的是父节点;获取所有子节点(非父节点),判断复选框状态加入到右侧ul或删除
}else{
//调用递归函数;获取所有非父级子节点数组集合
var addNodesArray = getAllChildrenNodes(treeNode,[]);
//是选中状态,加入到右侧ul
if(treeNode.checked){
//定义存储右侧li的数组
var rightLiArray = [];
$("#ulright li").each(function(i,v){
rightLiArray.push($(v).attr("title"))
})
rightLiArray = rightLiArray.slice(1);
//遍历勾选的数组集合
for(var i=0;i<addNodesArray.length;i++){
//判断此节点是否在右侧ul内;不存在则加入
if(rightLiArray.indexOf(addNodesArray[i]) == -1){
//创建li 追加li
var addLi = $("<li title="+addNodesArray[i]+"><span>"+addNodesArray[i]+"</span>");
addLi.animate({
width:"100%",
height:30
},400)
addLi.appendTo($("#ulright"));
}
//将节点背景颜色修改
$("#treeDemo").find("a[title="+addNodesArray[i]+"]").css("backgroundColor","#00b6ba");
}
//是非选中状态,删除
}else{
//遍历节点,执行删除操作
for(var i=0;i<addNodesArray.length;i++){
$("#ulright").find("li[title="+addNodesArray[i]+"]").animate({
width:"0%",
height:0
},function(){
$(this).css("display","none");
$(this).remove();
})
//还原背景颜色
$("#treeDemo").find("a[title="+addNodesArray[i]+"]").css("backgroundColor","");
}
}
}
},
}
};
//zTree的节点信息;可一次性全部加载;可试试异步请求
var zNodes = [{
name: "数据表",//名称
id: 4,//id,子元素的pid
isParent:true,//是否为父节点,默认为false
pid:0//父节点id;data中的rootPId;
},{
name: "测试表",
id: 1,
isParent:true,
pid:0
},{
name: "信息表",
id: 2,
isParent:true,
pid:0
},{
name: "作废表",
id: 3,
isParent:true,
pid:0
}];
$(document).ready(function() {
//初始化zTree; zTree容器的jquery对象/ 配置/ 节点
$.fn.zTree.init($("#treeDemo"), setting, zNodes);
});Copy after login
Background php code; I am purely front-end, and I can only write simple background code;
<?php
$pId = $_POST['id'];
if($pId == 4){
$array = array('{"name":"数据表_一","id":"1_1","pid":"0"}','{"name":"数据表_二","id":"1_2","pid":"0"}','{"name":"数据表_三","id":"1_3","pid":"0"}','{"name":"数据表_四","id":"1_4","pid":"0"}','{"name":"数据表_五","id":"1_5","pid":"0"}');
}else if($pId == 1){
$array = array('{"name":"测试表_一","id":"2_1","pid":"1"}','{"name":"测试表_二","connect":"测试表_一","id":"2_2","pid":"1"}','{"name":"测试表_三","id":"2_3","pid":"1"}','{"name":"测试表_四","id":"2_4","pid":"1"}','{"name":"测试表_五","id":"2_5","pid":"1"}');
}else if($pId == 2){
$array = array('{"name":"信息表_一","id":"3_1","pid":"3"}','{"name":"信息表_二","id":"3_2","pid":"3"}','{"name":"信息表_三","id":"3_3","pid":"3"}','{"name":"信息表_四","id":"3_4","pid":"3"}','{"name":"信息表_五","id":"3_5","pid":"3"}','{"name":"信息表_五_一","id":"3_5_1","pid":"3_5"}','{"name":"信息表_五_二","id":"3_5_2","pid":"3_5"}','{"name":"信息表_三_一","id":"3_3_1","pid":"3_3"}','{"name":"信息表_三_二","id":"3_3_2","pid":"3_3"}','{"name":"信息表_三_三","id":"3_3_3","pid":"3_3"}');
}else if($pId == 3){
$array = array('{"name":"作废表_一","id":"4_1","pid":"3"}','{"name":"作废表_二","id":"4_2","pid":"3"}','{"name":"作废表_三","id":"4_3","pid":"3"}');
}
echo json_encode($array);Copy after login
Most of the js code has comments; detailed API can be viewed on the zTree official website and enter the official API document. The code needs to be run in a server environment;
Final chestnut renderings
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