<p style="text-align: left">本文介绍了layui中的树形关于取值传值问题，分享给大家，具体如下：
<p style="text-align: center">
这个是我们需要的效果，实际操作中会先执行渲染 然后在执行方法，然后我们发现树形的JSON是空，调试了N遍一直以为是优先级别的问题了。
最后解决方案是
//<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>节点数据
getTreeData();
//return false;
});
function getTreeData() {
$.ajax({
//async: false,type: "post",url: "/api/WebFW//getOrgTree",datatype: "json",contenttype: "application/json; charset=utf-8",success: function (jdata) {
var xtree1 = new layuiXtree({
elem: 'xtree1',form: form,data: strToJson(jdata),isopen: true,//false初始关闭，true打开
click: function (data) { //节点选中状态改变事件监听，全选框有自己的监听事件
console.log(data.elem); //得到checkBox原始DOM对象
console.log(data.elem.checked); //是否选中，true选中
alert(data.value); //弹出value值
}
});
//<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>选中val
document.getElementById('btn1').onclick = function () {
var oCks = xtree1.GetChecked();
for (var i = 0; i < oCks.length; i++) {
alert(oCks[i].value);
}
}
//子节点选中改变，父节点更改自身状态
layuiXtree.prototype.ParendCheck = function (ckelem) {
var _this = this;
var xtree_p = ckelem.parentNode.parentNode;
if (xtree_p.getAttribute('class') == 'layui-xtree-item') {
var xtree_all = _this.getChildByClassName(xtree_p,'layui-xtree-item');
var xtree_count = 0;
for (var i = 0; i < xtree_all.length; i++) {
if (_this.getChildByClassName(xtree_all[i],'layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>')[0].checked) {
xtree_count++;
}
}
if (xtree_count <= 0) {
_this.getChildByClassName(xtree_p,'layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>')[0].checked = false;
_this.getChildByClassName(xtree_p,'layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>')[0].nextSibling.classList.remove('layui-form-checked');
} else {
_this.getChildByClassName(xtree_p,'layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>')[0].checked = true;
_this.getChildByClassName(xtree_p,'layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>')[0].nextSibling.classList.add('layui-form-checked');
}
this.ParendCheck(_this.getChildByClassName(xtree_p,'layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>')[0]);
}
}
//渲染之前按照选中的末级去改变父级选中状态
layuiXtree.prototype.ParentCheck<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>Checked = function (e) {
var _this = this;
if (e.parentNode.parentNode.getAttribute('class') == 'layui-xtree-item') {
var _pe = _this.getChildByClassName(e.parentNode.parentNode,'layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>')[0];
_pe.checked = true;
_this.ParentCheck<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>Checked(_pe);
}
}
//<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>全部选中的末级check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>对象
layuiXtree.prototype.GetChecked = function () {
var _this = this;
var arr = new Array();
var arrIndex = 0;
var cks = _this.getByClassName('layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>');
for (var i = 0; i < cks.length; i++) {
if (cks[i].checked && cks[i].getAttribute('data-xend') == '1') {
arr[arrIndex] = cks[i];
arrIndex++;
}
}
return arr;
}
//<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>全部的原始check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>对象
layuiXtree.prototype.GetAllCheck<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a> = function () {
var _this = this;
var arr = new Array();
var arrIndex = 0;
var cks = _this.getByClassName('layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>');
for (var i = 0; i < cks.length; i++) {
arr[arrIndex] = cks[i];
arrIndex++;
}
return arr;
}
//根据值来<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>其父级的check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>原dom对象
layuiXtree.prototype.GetParent = function (a) {
var _this = this;
var cks = _this.getByClassName('layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>');
for (var i = 0; i < cks.length; i++) {
if (cks[i].value == a) {
if (cks[i].parentNode.parentNode.getAttribute('id') == _this._container.getAttribute('id')) return null;
return _this.getChildByClassName(cks[i].parentNode.parentNode,'layui-xtree-check<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>')[0];
}
}
return null;
}
}
});}
function strToJson(str) {
var json = (new Function("return " + str))();
return json;
}
