bootstrap多级分类选择器

应用场景:使用bootstrap框架,在模态框中修改所属分类,分类层级较多,一般在2级以上.

出现问题:因已经在模态框中,bootstrap不允许同时弹出多个模态框.

一开始在网上找各种select组件希望得到多级分类解决办法,但基本上对多级选择的支持都只到2级,后来想了想也合理,一个select框的宽度有限,如果没有限制很容易就会变形,ui上不好控制.

一直聚焦在select上,很长的时间才跳出了select的思维,想到bootstrap的dropdown组件,一直是被当导航下拉来使用,但是做一些调整也可以当成选择器

在单机是触发所需的操作即可,代码不是很严谨,主要解决功能需求.

使用环境:bootstrap3.3.7.css,bootstrap-dropdown-extend.css,jquery-3.3.1.js,bootstrap3.3.7.js

bootstrap-dropdown-extend.css:忘了从哪个大神那里拔的了,不是专门的前端实在懒得调整(如果觉得有影响,联系我加上链接)

.dropdown-submenu {
    position: relative;
}
.dropdown-submenu > .dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -6px;
    margin-left: -1px;
    -webkit-border-radius: 0 6px 6px 6px;
    -moz-border-radius: 0 6px 6px;
    border-radius: 0 6px 6px 6px;
}
.dropdown-submenu:hover > .dropdown-menu {
    display: block;
}
.dropdown-submenu > a:after {
    display: block;
    content: " ";
    float: right;
    width: 0;
    height: 0;
    border-color: transparent;
    border-style: solid;
    border-width: 5px 0 5px 5px;
    border-left-color: #ccc;
    margin-top: 5px;
    margin-right: -10px;
}
.dropdown-submenu:hover > a:after {
    border-left-color: #fff;
}
.dropdown-submenu.pull-left {
    float: none;
}
.dropdown-submenu.pull-left > .dropdown-menu {
    left: -100%;
    margin-left: 10px;
    -webkit-border-radius: 6px 0 6px 6px;
    -moz-border-radius: 6px 0 6px 6px;
    border-radius: 6px 0 6px 6px;
}

静态html片段(这是个产生数据后html的片段,有兴趣可以从中看出层级关系,结合css可以更加理解原理,不想理解的可以直接忽略这个)

<div class="container">
    <h2>Bootstrap 3多级下拉菜单</h2>
    <hr>
    <div class="dropdown open">
        <a id="asset_type_btn" role="button" data-toggle="dropdown" class="btn btn-default" href="javascript:;"
           aria-expanded="true">
            选择类型 <span class="caret"></span>
        </a>
        <ul class="dropdown-menu" role="menu" aria-labelledby="assert_type_btn">
            <li class="dropdown-submenu"><a tabindex="-1" class="disabled" id="typeId1" href="javascript:;">固定资产</a>
                <ul class="dropdown-menu">
                    <li class="dropdown-submenu"><a tabindex="-1" id="typeId3" href="javascript:;">房屋及构筑物</a>
                        <ul class="dropdown-menu">
                            <li class="dropdown-submenu"><a tabindex="-1" id="typeId12" href="javascript:;">测试</a>
                                <ul class="dropdown-menu">
                                    <li class="dropdown-submenu"><a tabindex="-1" id="typeId9"
                                                                    href="javascript:;">test</a>
                                        <ul class="dropdown-menu">
                                            <li><a tabindex="-1" href="javascript:;" id="typeId10"
                                                   οnclick="selectType('10','再测试')">再测试</a></li>
                                        </ul>
                                    </li>
                                </ul>
                            </li>
                        </ul>
                    </li>
                    <li class="dropdown-submenu"><a tabindex="-1" id="typeId4" href="javascript:;">通用设备</a>
                        <ul class="dropdown-menu">
                            <li><a tabindex="-1" href="javascript:;" id="typeId11"
                                   οnclick="selectType('11','电脑')">电脑</a></li>
                        </ul>
                    </li>
                    <li><a tabindex="-1" href="javascript:;" id="typeId5" οnclick="selectType('5','专用设备')">专用设备</a></li>
                    <li><a tabindex="-1" href="javascript:;" id="typeId6" οnclick="selectType('6','文物和陈列品')">文物和陈列品</a>
                    </li>
                </ul>
            </li>
            <li class="dropdown-submenu"><a tabindex="-1" class="disabled" id="typeId2" href="javascript:;">低值易耗品</a>
                <ul class="dropdown-menu">
                    <li class="dropdown-submenu"><a tabindex="-1" id="typeId7" href="javascript:;">易耗品</a>
                        <ul class="dropdown-menu">
                            <li class="dropdown-submenu"><a tabindex="-1" id="typeId13" href="javascript:;">测试易耗品</a>
                                <ul class="dropdown-menu">
                                    <li><a tabindex="-1" href="javascript:;" id="typeId15"
                                           οnclick="selectType('15','添加易耗品')">添加易耗品</a></li>
                                </ul>
                            </li>
                        </ul>
                    </li>
                    <li class="dropdown-submenu"><a tabindex="-1" id="typeId8" href="javascript:;">低值物品</a>
                        <ul class="dropdown-menu">
                            <li><a tabindex="-1" href="javascript:;" id="typeId14" οnclick="selectType('14','测试低值物品')">测试低值物品</a>
                            </li>
                        </ul>
                    </li>
                </ul>
            </li>
        </ul>
    </div>
</div>

使用时 html片段:

<div class="container">
    <h2>Bootstrap 3多级下拉菜单</h2>
    <hr>
    <div class="dropdown">
        <a id="asset_type_btn" role="button" data-toggle="dropdown" class="btn btn-default" href="javascript:;">
            选择类型 <span class="caret"></span>
        </a>
        <ul class="dropdown-menu" role="menu" aria-labelledby="assert_type_btn">
        </ul>
    </div>
</div>

使用时 js代码

var data = [
            {
            typeId: 1,
            typeParentId: 0,
            typeName: "固定资产",
            level: 1,
            childFlag: 1
            },
            {
            typeId: 2,
            typeParentId: 0,
            typeName: "低值易耗品",
            level: 1,
            childFlag: 1
            },
            {
            typeId: 3,
            typeParentId: 1,
            typeName: "房屋及构筑物",
            level: 2,
            childFlag: 1
            },
            {
            typeId: 4,
            typeParentId: 1,
            typeName: "通用设备",
            level: 2,
            childFlag: 1
            },
            {
            typeId: 5,
            typeParentId: 1,
            typeName: "专用设备",
            level: 2,
            childFlag: 0
            },
            {
            typeId: 6,
            typeParentId: 1,
            typeName: "文物和陈列品",
            level: 2,
            childFlag: 0
            },
            {
            typeId: 7,
            typeParentId: 2,
            typeName: "易耗品",
            level: 2,
            childFlag: 1
            },
            {
            typeId: 8,
            typeParentId: 2,
            typeName: "低值物品",
            level: 2,
            childFlag: 1
            },
            {
            typeId: 9,
            typeParentId: 12,
            typeName: "test",
            level: 4,
            childFlag: 1
            },
            {
            typeId: 10,
            typeParentId: 9,
            typeName: "再测试",
            level: 5,
            childFlag: 0
            },
            {
            typeId: 11,
            typeParentId: 4,
            typeName: "电脑",
            level: 3,
            childFlag: 0
            },
            {
            typeId: 12,
            typeParentId: 3,
            typeName: "测试",
            level: 3,
            childFlag: 1
            },
            {
            typeId: 13,
            typeParentId: 7,
            typeName: "测试易耗品",
            level: 3,
            childFlag: 1
            },
            {
            typeId: 14,
            typeParentId: 8,
            typeName: "测试低值物品",
            level: 3,
            childFlag: 0
            },
            {
            typeId: 15,
            typeParentId: 13,
            typeName: "添加易耗品",
            level: 4,
            childFlag: 0
            }
        ]

 
        //立即执行函数
        $(function () {
            //调用初始化下拉方法
            initData();
        });
 
        //初始化dropdown中内容
        function initData() {
            var option={
                maxLevel:5,
                data:data
            };
            processData(option);
            
            
//          $.get(
//              "/test/test",
//              function (data) {
//                  var option={
//                      maxLevel:5,
//                      data:data.data
//                  };
//                  processData(option);
//              }
//          );
        }
        //js拼接html代码
        function processData(option) {
            for (var i = 1; i <= option.maxLevel; i++) {
                if (i == 1) {
                    $.each(option.data, function (n,value) {
                        if (value.level == 1) {
                            if (value.childFlag == 0) {
                                var result = "<li><a tabindex=\"-1\" href=\"javascript:;\" id=\"typeId" + value.typeId + "\" onclick=\"selectType('" + value.typeId + "','" + value.typeName + "')\">" + value.typeName + "</a></li>";
                                $("#asset_type_btn").next().append(result);
                            } else {
                                var result = "<li class=\"dropdown-submenu\"><a tabindex=\"-1\" class=\"disabled\" id=\"typeId"+value.typeId+"\" href=\"javascript:;\">" + value.typeName + "</a><ul class=\"dropdown-menu\"></ul></li>";
                                $("#asset_type_btn").next().append(result);
                            }
                        }
                    });
                } else {
                    $.each(option.data, function (n,value) {
                        if (value.level == i) {
                            if (value.childFlag == 0) {
                                var result = "<li><a tabindex=\"-1\" href=\"javascript:;\" id=\"typeId" + value.typeId + "\" onclick=\"selectType('" + value.typeId + "','" + value.typeName + "')\">" + value.typeName + "</a></li>";
                                $("#" + "typeId" + value.typeParentId).next().append(result);
                            } else {
                                var result = "<li class=\"dropdown-submenu\"><a tabindex=\"-1\" id=\"typeId"+value.typeId+"\" href=\"javascript:;\">" + value.typeName + "</a><ul class=\"dropdown-menu\"></ul></li>";
                                $("#" + "typeId" + value.typeParentId).next().append(result);
                            }
                        }
                    });
                }
            }
        }
 
        //点击后操作
        function selectType(typeId, typeName) {
            //选择分类后操作
            console.info("typeId:" + typeId);
            console.info("typeName:" + typeName);
            $('#select_value').text(typeName);
        }

来源：https://www.cnblogs.com/sunBinary/p/11761234.html