CI框架（ajax分页，全选，反选，不选，批量删除）完整代码详解

//ajax分页+搜索（视图层）
function ajax_page(page){
var sou = $('#sou').val();
$.ajax({
type: "POST",
dataType: "json",
url: "<?PHP echo site_url('Welcome/ajax_page')?>",
data: "page="+page+"&sou="+sou,
success: function(data){
var str="";
str+="<table border='1' style='text-align:center'>";
str+="<tr>";
str+="<td><input type='checkbox' class='quan'/></td>";
str+="<td>ID</td>";
str+="<td>用户名</td>";
str+="<td>操作</td>";
str+="</tr>";
$.each(data.list,function(i,item){
if(item.state==0){
var locks = "<a href='JavaScript:void(0)' class='lok' fla='"+item.id+"' id='lock"+item.id+"'>未锁定</a>"
}else{
var locks = "<a href='javascript:void(0)' class='lok' fla='"+item.id+"' id='lock"+item.id+"'>锁定</a>"
}
str+="<tr id='av"+item.id+"'>";
str+="<td><input type='checkbox' class='ss' value='"+item.id+"'/></td>";
str+="<td>"+item.id+"</td>";
str+="<td>"+item.name+"</td>";
str+="<td>"+locks+"</td>";
str+="</tr>";
})
str+="<tr>";
str+="<td><input type='button' id='pdel' value='批量删除'></td>"
str+="</tr>";
str+="</table>";
str+=data.pagestr;
$('#content').html(str);
}
})
}
//状态切换
$(document).on('click','.lok',function(){
var id = $(this).attr('fla');
$.ajax({
type: "POST",
url: "<?php echo site_url('Welcome/upds')?>",
data: "id="+id,
success: function(msg){
if(msg==1){
$('#lock'+id).html("锁定");
}else{
$('#lock'+id).html("未锁定");
}
}
})
})
//批量删除
$(document).on('click','#pdel',function(){
var ids = $('.ss');
var str="";
$.each(ids,function(i,item){
if(ids[i].checked==true){
str=str+','+ids[i].value;
}
})
var new_str=str.substr(1);
$.ajax({
type: "POST",
url: "<?php echo site_url('Welcome/pdels')?>",
data: "new_str="+new_str,
success: function(msg){
$.each(ids,function(i,item){
if(ids[i].checked==true){
$('#av'+ids[i].value).remove();
}
})
}
})
})
//全选(复选框)
$(document).on('click','.quan',function(){
var obj = $(':checkbox');
var ids = $('.ss');
if(obj[0].checked==true){
$.each(ids,function(i,item){
ids[i].checked=true;
})
}else{
$.each(ids,function(i,item){
ids[i].checked=false;
})
}
})
<td><input type="checkbox" class="checks" value="<?php echo $val['u_id']?>"/></td>
//全选（按钮）
$('.quan').click(function(){
var ids = $('input:checkbox');
$.each(ids,function(i,item){
ids[i].checked=true;
})
})
//全不选
$('.bu').click(function(){
var ids = $('input:checkbox');
$.each(ids,function(i,item){
ids[i].checked=false;
})
})
//反选
$('.fan').click(function(){
var ids = $('.checks');
$.each(ids,function(i,item){
ids[i].checked=!ids[i].checked;
})
})
//即点即改
$(document).on('click','.ss',function(){
var id = $(this).attr('id');
var con = $(this).text();
$(this).parent().html("<input type='text' id='"+id+"' class='aa' value='"+con+"'>");
$('.aa').val('').focus().val(con);
$(document).on('blur','.aa',function(){
var id = $(this).attr('id');
var cons = $(this).val();
$(this).parent().html("<span id='"+id+"' class='ss'>"+cons+"</span>");
$.ajax({
type: "POST",
url: "<?php echo site_url('Welcome/upd_ji')?>",
data: "id="+id+"&cons="+cons
})
})
})
//导出
$(document).on('click','#chu',function(){
var sou = $('#sou').val();
location.href="<?php echo site_url('excel/export')?>?sou="+sou;
})
//ajax分页（控制层）
public function ajax_page(){
$sou = $this->input->post('sou');
$count = $this->db->where("name like '%$sou%'")->count_all_results("peng");
$number = 3;
$this->session->set_userdata('number',$number);
$pagecount = ceil($count/$number);
@$page = $_POST['page']?$_POST['page']:1;
$this->session->set_userdata('page',$page);
$start = ($page-1)*$number;
$arr['list'] = $this->db->where("name like '%$sou%'")->limit($number,$start)->get("peng")->result_array();
$up_page = $page-1<1?1:$page-1;
$down_page = $page+1>$pagecount?$pagecount:$page+1;
$str = "";
$str .= "<a href='javascript:void(0)' onclick='ajax_page($up_page)'>上一页</a>";
for($i=1;$i<=$pagecount;$i++){
if($i==$page){
$str .= "--"."<b>$i</b>";
}else{
$str .= "--"."<a href='javascript:void(0)' onclick='ajax_page($i)'>$i</a>";
}
}
$str .= "--"."<a href='javascript:void(0)' onclick='ajax_page($down_page)'>下一页</a>";
$arr['pagestr'] = $str;
echo json_encode($arr);
}
//状态切换
public function upds(){
$id = $this->input->post('id');
$arr = $this->db->get_where("peng","id='$id'")->row_array();
if($arr['state']==0){
$data['state']=1;
$this->db->where("id='$id'")->update("peng",$data);
echo "1";
}else{
$data['state']=0;
$this->db->where("id='$id'")->update("peng",$data);
echo "2";
}
}
//批量删除
public function pdels(){
$str = $this->input->post('new_str');
$this->db->where("id in($str)")->delete("peng");
}