layui table 复选框跳页后再回来保持原来选中的状态

旧城等待， 2022-02-20 10:45 550阅读 0赞

layui table默认跳页后不存在源页面选中的状态。如果要实现记录源页面的选中状态，需要定义一个全局变量来记录数据选中状态。

1、修改table.js

;layui.define(["laytpl", "laypage", "layer", "form"], function (e) { 
        "use strict";
        var t = layui.$, i = layui.laytpl, a = layui.laypage, l = layui.layer, n = layui.form, o = layui.hint(),
            r = layui.device(), d = { 
            	//layuiPageCheckedIds变量记录选中的数据id，格式是“,1,2,3,4,”的字符串
                config: { checkName: "LAY_CHECKED", indexName: "LAY_TABLE_INDEX", layuiPageCheckedIds: ","},
                cache: { },
                index: layui.table ? layui.table.index + 1e4 : 0,
                set: function (e) { 
                    var i = this;
                    return i.config = t.extend({ }, i.config, e), i
                },
                on: function (e, t) { 
                    return layui.onevent.call(this, s, e, t)
                }
            }
            
            ...
            
            S.prototype.pullData = function (e, i) { 
            var a = this, n = a.config, o = n.request, r = n.response, d = function () { 
                "object" == typeof n.initSort && a.sort(n.initSort.field, n.initSort.type)
            };
            if (a.startTime = (new Date).getTime(), n.url) { 
                var c = { };
                //在发送请求前将选中的数据放入条件中
                if(n.layuiPageCheckedIds != undefined && "" != n.layuiPageCheckedIds){ 
                    n.where.layuiCheckedIds = n.layuiPageCheckedIds;
                }
                if(tableRender){ 
                    var currPageNumber = getPageNumber();
                    c[o.pageName] = currPageNumber;
                    tableRender = false;
                }else{ 
                    setPageNumberCookie(e);
                    c[o.pageName] = e;
                }
                c[o.limitName] = n.limit;
                t.ajax({ 
                    type: n.method || "get",
                    url: n.url,
                    data: t.extend(c, n.where),
                    dataType: "json",
                    success: function (t) { 
                        if(null != startLoading){ 
                            layer.close(startLoading);
                            startLoading = null;
                        }
                        return t[r.statusName] != r.statusCode ? (a.renderForm(), a.layMain.html('<div class="' + f + '">' + (t[r.msgName] || "返回的数据状态异常") + "</div>")) : (a.renderData(t, e, t[r.countName]), d(), n.time = (new Date).getTime() - a.startTime + " ms", i && l.close(i), void("function" == typeof n.done && n.done(t, e, t[r.countName])))
                    },
                    error: function (e, t) { 
                        a.layMain.html('<div class="' + f + '">数据接口请求异常</div>'), a.renderForm(), i && l.close(i)
                    }
                });
            } else if (n.data && n.data.constructor === Array) { 
                if(null != startLoading){ 
                    layer.close(startLoading);
                    startLoading = null;
                }
                var s = { }, u = e * n.limit - n.limit;
                s[r.dataName] = n.data.concat().splice(u, n.limit), s[r.countName] = n.data.length, a.renderData(s, e, n.data.length), d(), "function" == typeof n.done && n.done(s, e, s[r.countName])
            }
        }
        ...
        //在文件的最后添加设置选中变量的方法
        //设置初始选中值
        ,d.initPageCheckedIds=function(e,i){ 
            if(i == undefined || i == ""){ 
                i = "";
            }
            if(i.length > 0 && "," != i.substring(0,1)){ 
                i = "," + i;
            }
            if(i.length > 0 && "," != i.substring(i.length - 1, i.length)){ 
                i = i + ",";
            }
            c.config[e].layuiPageCheckedIds = i;
        },
        //获取选中的ids, 参数e表示table的id
        d.getLayuiPageCheckedIds=function (e) { 
                return c.config[e].layuiPageCheckedIds;
        },
        //设置选中的ids,e表示table的id,obj表示选中的行数据，v表示记录哪一个参数
        d.setLayuiPageCheckedIds=function (e,obj,v) { 
            var a = c.config[e];
            var layuiPageCheckedIds = a.layuiPageCheckedIds;
            //全选按钮
            if(obj.type == "all"){ 
            	//全选
                if (obj.checked) { 
                    var checkStatus = d.checkStatus(e);
                    var datas = checkStatus.data;
                    for(var i = 0; i < datas.length; i++) { 
                        layuiPageCheckedIds = d.setPageSelected(layuiPageCheckedIds, datas[i][v]);
                    }
                } 
    			//取消全选
    			else { 
                    var cache = d.cache;
                    var datas = cache[e];
                    for(var i = 0; i < datas.length; i++) { 
                        layuiPageCheckedIds = d.cancelPageSelected(layuiPageCheckedIds, datas[i][v]);
                    }
                }
            }
    		//单行选中
    		else { 
    			//选中
                if (obj.checked) { 
                    layuiPageCheckedIds = d.setPageSelected(layuiPageCheckedIds, obj.data[v]);
                }
    			//取消选中
    			 else { 
                    layuiPageCheckedIds = d.cancelPageSelected(layuiPageCheckedIds, obj.data[v]);
                }
            }
            a.layuiPageCheckedIds = layuiPageCheckedIds;
        },
    	//添加选中项
    	d.setPageSelected=function(layuiPageCheckedIds, seleted){ 
            if(layuiPageCheckedIds == undefined || layuiPageCheckedIds == ""){ 
                    return  "," + seleted + ",";
                }else{ 
                    return layuiPageCheckedIds + seleted + ",";
                }
        },
    	//取消选中项
    	d.cancelPageSelected=function (layuiPageCheckedIds, seleted) { 
            var match = "," + seleted + ",";
            var pos = layuiPageCheckedIds.indexOf(match);
            if (pos >= 0) { 
                return layuiPageCheckedIds.substring(0, pos) + layuiPageCheckedIds.substring(pos + match.length - 1);
            }
        }
    });

2、后台根据id设置数据选中状态

@RequestMapping(value = "/search", method = RequestMethod.GET)
        @ResponseBody
        public Map<String, Object> search(Pageable pageable, @RequestParam List<Long> layuiCheckedIds) { 
            Map<String, Object> rst = new HashMap<>(4);
            rst.put("code", 0);
            rst.put("msg", "");
    
            Page<Person> page = personService.findPage(pageable);
            
            rst.put("count", page.getTotalSize());
            List<Map<String, Object>> datas = new ArrayList<>(8);
            
            for (Person person : page.getContent()) { 
                Map<String, Object> view = new HashMap<>(4);
                view.put("id", person.getId());
                view.put("name", person.getName());
     			
     			//如果person.getId()已经被选中，则设置选中状态
                if (!CollectionUtils.isEmpty(layuiCheckedIds) && layuiCheckedIds.contains(person.getId())) { 
                    view.put("LAY_CHECKED", true);
                }
                ...
                datas.add(view);
            }
            rst.put("data", datas);
            return rst;
        }

3、前端用法

layui.use("table", function(){ 
    	var table = layui.table;
    
    	//设置初始选中项
    	var checkedIds = "1,2,3,4";
    	table.render({ 
    		elem: '#test',
    		url:"./person/search",
    		where: { "layuiCheckedIds": checkedIds },
    		,cols: [[
    			{ type:'checkbox', width:'10%'},
    			{ field:'id', title: 'ID', width:'20%'},
    			{ field:'name', title: '姓名', width:'15%'}
    		]],
    		page: true,
    		id:'idTest'
    	});
    	//初始化选中项
    	table.initPageCheckedIds('idTest', checkedIds );
        //监听表格复选框选择
        table.on('checkbox(demo)', function(obj){ 
        	//设置多页面选中效果
        	//第一个参数表示table的id值，第二个参数表示复选框选中的数据，第三个参数表示要解析的是哪一个属性值（这里是将数据模型中的id属性进行解析）。
            table.setLayuiPageCheckedIds('idTest',obj, "id");
    		
    		//获取所有选中的id值（例如：“,1,2,5,7,3,15,22”）
    		//alert(table.getLayuiPageCheckedIds('idTest'));
        });
    });