现在要做的就是最多可以选择三个标签,选中的标签要在“选择标签”那一栏里面显示。
标签都是span元素,“选择标签”那一栏是个input。
这个效果该怎么实现呢?请教jquery高手 ,谢谢 ~
回复内容:
现在要做的就是最多可以选择三个标签,选中的标签要在“选择标签”那一栏里面显示。
标签都是span元素,“选择标签”那一栏是个input。
这个效果该怎么实现呢?请教jquery高手 ,谢谢 ~
假定你这些标签的数据都是从后端渲染的,那么就会有相应的id和值,假设页面渲染出来是这个效果
<code><div class="container"> <div class="input-group input-group-sm"> <input type="text" class="form-control" id="input" readonly> <span class="input-group-addon" id="certainBtn">确定</span> </div> <div class="btn-group btn-group-sm mt" id="labels"> <span type="button" class="btn btn-default" data-id="1" data-value="公司运营">公司运营</span> <span type="button" class="btn btn-default" data-id="2" data-value="互联网营销">互联网营销</span> <span type="button" class="btn btn-default" data-id="3" data-value="组织变革">组织变革</span> <span type="button" class="btn btn-default" data-id="4" data-value="招聘/激励">招聘/激励</span> <span type="button" class="btn btn-default" data-id="5" data-value="品牌公关">品牌公关</span> <span type="button" class="btn btn-default" data-id="6" data-value="财务/法务">财务/法务</span> </div> </div> (function ($) { var $labels = $('#labels'); //标签栏 var $input = $('#input'); //输入框 var $certainBtn=$('#certainBtn'); //确定按钮 var data = {};//已选择的数据 var max = 3; //最多选择数目 var activeClass = 'btn-primary'; //选中的active样式 $labels.on('click', 'span', function () { var $this = $(this); var id = $this.data('id'); var value = $this.data('value'); var isSelected = $this.hasClass(activeClass);//是否被选中 //超过数目限制则不做处理 if (!isSelected && Object.keys(data).length >= max) { return; } isSelected ? delete data[id] : data[id] = value; $this.toggleClass(activeClass); renderInput(); }); $certainBtn.click(function () { console.log(data); }); function renderInput() { var values = []; for (var id in data) { values.push(data[id]); } $input.val(values.toString()); //with underscore //$input.val(_.values(data).toString()); } })(jQuery); </code>
采用组件化的思想重新写一个
<code>(function($){ var labelChoose = { el: { $labels: $('#labels'), $input: $('#input'), $certainBtn: $('#certainBtn') }, max: 3, data: {}, activeClass: 'btn-primary', init: function (defaultData) { var self = this; this.renderInit(defaultData); //初始化 this.el.$labels.on('click', 'span', function (e) { self.labelsClick(e); }); this.el.$certainBtn.on('click', function (e) { self.certainClick(e); }); }, labelsClick: function (e) { var $this = $(e.currentTarget); var id = $this.data('id'); var value = $this.data('value'); var isSelected = $this.hasClass(this.activeClass);//是否被选中 //超过数目限制则不做处理 if (!isSelected && Object.keys(this.data).length >= this.max) { return; } isSelected ? delete this.data[id] : this.data[id] = value; $this.toggleClass(this.activeClass); this.renderInput(); }, renderLabels: function () { var self = this; this.el.$labels.find('span').each(function () { var $this = $(this); var id = $this.data('id'); for (var idz in self.data) { if (idz === id.toString()) { $this.addClass(self.activeClass); } } }); }, renderInput: function () { var values = []; for (var id in this.data) { values.push(this.data[id]); } //with underscore //this.el.$input.val(_.values(this.data).toString()); this.el.$input.val(values.toString()); }, certainClick: function (e) { console.log(this.data); }, renderInit: function (defaultData) { this.data = defaultData || {}; this.renderLabels(); this.renderInput(); } }; labelChoose.init({ '1': '公司运营', '2': '互联网营销' }); })(jQuery); </code>
由于涉及到数据操作和this绑定,和underscore结合起来使用会比较好点,以上代码仅供参考!
大概要做这么几件事:
<code>1.定义显示被选中的标签的函数 2.在每个标签上设置点击事件 </code>
在每次点击标签的时候,把当前的this标签传到1的函数里,append到input的value里。
这种插件自己写的话会很麻烦 建议直接用插件去实现
给你说两个吧 都是我经常用到的:
select2 和 flatui(前端UI框架)
点进去看看文档稍有JQ基础都可以做出你想要的效果。
我再简单描述一下自己写代码要怎么实现:
input框里肯定是要有CSS和JS来控制的
span标签添加点击事件,点击后加个display:none
的style(并不是删除 方便在input中点击移除后重新展现)。
假定span有个id叫sp1 input的id叫show,大概的思路是这样的:
<code>$('#sp1').click(function(){ $(this).css('display','none'); //获取span中的值复制给input $('#show').val($(this).html()); }) </code>
span中的值赋值给input久做好了,但是如果在input点击后取消显示就有一些复杂了,你需要定制一些样式,最起码input中的值可以点击并且触发事件。我就说这么多,起到抛砖引玉的作用。

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