数据库:test
数据表:(tp_category):
Common/conf/config.php
'DB_CONFIG2' => array(
'db_type' => 'mysql',
'db_user' => 'root',
'db_pwd' => '',
'db_host' => 'localhost',
'db_port' => '3306',
'db_name' => 'test',
'DB_PREFIX' => 'tp_', // 数据库表前缀 'DB_CHARSET'=> 'utf8', // 字符集 'DB_DEBUG' => TRUE, // 数据库调试模式 开启后可以记录SQL日志 3.2.3新增 ),
Common/function.php 遍历函数loop
/* * 递归遍历 * @param $data array * @param $id int * return array * */ function recursion($data, $id=0) {
$list = array();
foreach($data as $v) {
if($v['pid'] == $id) {
$v['son'] = recursion($data, $v['id']);
if(empty($v['son'])) {
unset($v['son']);
}
array_push($list, $v);
}
}
return $list;
}
Controller/IndexController.class.php
public function test() {
$category = M('category', '', C('DB_CONFIG2'))->select();
$result = loop($category);
var_dump($result);
$this->assign('list', $result);
$this->display();
}
在模板(View/Index/test.html)中输出(仅支持2级分类,如果想全部显示,建议先把数组转换成JSON格式,然后通过AJAX请求,JS生成)
<ul>
<volist name="list" id="vo">
<li>
{$vo.category}
<notempty name="vo['children']">
<ul>
<volist name="vo['children']" id="cate">
<li>{$cate.category}</li>
</volist>
</ul>
</notempty>
</li>
</volist>
</ul>
后续(ajax请求,递归显示所有分类):
方法 Controller/IndexController.class.php
public function test() {
$this->display();
}
public function resultCategory() {
$category = M('category', '', C('DB_CONFIG2'))->select();
$result = loop($category);
$this->ajaxReturn(array('data'=>$result,'status'=>'1','info'=>'获取列表成功'));
}
模板 View/Index/test.html
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>分类测试</title>
<script src="__PUBLIC__/js/jquery.min.js"></script>
</head>
<body>
<ul id="menu"></ul>
<script>
$(function() {
// 递归列表函数 function recursion(selector,data)
{
if(!data) return false;
for(var i=0;i<data.length;i++)
{
var li=$('<li>'+data[i]['category']+'</li>');
if(data[i]['children'] && data[i]['children'].length>0)
{
var ul=$('<ul></ul>');
recursion(ul,data[i]['children']);
li.append(ul);
}
selector.append(li);
}
}
// ajax请求 用$.post() 会更方便 $.ajax({
url: "{:U('resultCategory')}",
type: 'post',
dataType: 'json',
error: function(res) {
console.log(res);
},
success: function(res) {
recursion($('#menu'),res['data']);
console.log(res['data']);
}
});
});
</script>
</body>
</html>
另一种无限级分类:
/** * 无限极分类 * @param [type] $cate [description] * @param integer $pid [description] * @param integer $level [description] * @param string $html [description] * @return [type] [description] */ function sortOut($cate,$pid=0,$level=0,$html='--'){
$tree = array();
foreach($cate as $v){
if($v['pid'] == $pid){
$v['level'] = $level + 1;
$v['html'] = str_repeat($html, $level);
$tree[] = $v;
$tree = array_merge($tree, sortOut($cate,$v['id'],$level+1,$html));
}
}
return $tree;
}
JS递归(特殊):
这个函数相当于实现php的str_repeat函数
/* 字符串重复函数 */ if(!String.str_out_times) {
String.prototype.str_out_times = function(l) {
return new Array(l+1).join(this);
}
}
// 定位到当前选择
function recursion(selector, data, j, pid) {
var space = ' ┠ ';
if(!data) return false;
$.each(data, function(i, item) {
var opt = $('<option value="'+item.id+'">'+space.str_out_times(j)+item.name+'</option>');selector.append(opt);
if(item.son && (item.son).length>0) {
recursion(selector, item.son, ++j);
j=0;
}
});
// 当前是哪个分类 selector.find('option').each(function() {
if($(this).val() == pid) {
$(this).attr('selected', 'selected');
}
});
}
为什么j=0呢。因为执行顺序感觉与php不同,这里是从上到下加载。。
ajax请求数据:
$('.btn-edit').click(function() {
var id = $(this).data('id');
$.post("{:U('Article/editArticle')}", {id: id}, function(res) {
// 分类 $('[name="pid"]').html('');
recursion($('[name="pid"]'), res.sort, 0, res.pid);
$('[name="id"]').val(res.id);
$('[name="title"]').val(res.title);
$('[name="summary"]').val(res.summary);
$('#thumbnailImg').attr('src', "__UPLOAD__"+'/thumbnail/'+res.thumbnail);
ue.setContent(res.content);
$('#modal-edit').modal('show');
});
});
感受:写递归有些绕人,建议读者要多写写递归函数。。。
谢谢关注!