在淘宝旅行上看到的城市选择效果,感觉还不错,就自己的理解重新实现一遍,先看效果(有人说IE9下面有BUG,LZ用的是落后的XP,居然装不上IE9,去公司在搞搞好了),然后再细说实现原理,支持鼠标上下键选择城市,支持直接输入城市名称,拼音首字母,全拼,支持IE6遮盖SELECT,压缩后12K,
我实现的步骤:
一、先用一定的格式罗列出控件所需要的城市以及拼音等,我这里是按照如下格式罗列成一个数组, 如果需要增加城市,直接增加在数组里面即可:
城市我是一个一个手打的。。。
- ['北京|beijing|bj','上海|shanghai|sh', '重庆|chongqing|cq']
二、因为控件的城市分组按好几类划分,比如:按首字母HOT 、ABCDEFH 、 IJKLMNOP 、 QRSTUVWXYZ 四组划分,
而划分了四组后又按照了首字母划分,所以我用正则表达式和循环把数组重新格式化为一个分组对象,热门城市取前16条。
对象格式如下:
- {HOT:{hot:[]},ABCDEFGH:{a:[1,2,3],b:[1,2,3]},IJKLMNOP:{i:[1.2.3],j:[1,2,3]},QRSTUVWXYZ:{}}
所用代码如下:
- /* *
- * 格式化城市数组为对象oCity,按照a-h,i-p,q-z,hot热门城市分组:
- * {HOT:{hot:[]},ABCDEFGH:{a:[1,2,3],b:[1,2,3]},IJKLMNOP:{i:[1.2.3],j:[1,2,3]},QRSTUVWXYZ:{}}
- * */
- (function () {
- var citys = Vcity.allCity, match, letter,
- regEx = Vcity.regEx,
- reg2 = /^[a-h]$/i, reg3 = /^[i-p]$/i, reg4 = /^[q-z]$/i;
- if (!Vcity.oCity) {
- Vcity.oCity = {hot:{},ABCDEFGH:{}, IJKLMNOP:{}, QRSTUVWXYZ:{}};
- //console.log(citys.length);
- for (var i = 0, n = citys.length; i < n; i++) {
- match = regEx.exec(citys[i]);
- letter = match[3].toUpperCase();
- if (reg2.test(letter)) {
- if (!Vcity.oCity.ABCDEFGH[letter]) Vcity.oCity.ABCDEFGH[letter] = [];
- Vcity.oCity.ABCDEFGH[letter].push(match[1]);
- } else if (reg3.test(letter)) {
- if (!Vcity.oCity.IJKLMNOP[letter]) Vcity.oCity.IJKLMNOP[letter] = [];
- Vcity.oCity.IJKLMNOP[letter].push(match[1]);
- } else if (reg4.test(letter)) {
- if (!Vcity.oCity.QRSTUVWXYZ[letter]) Vcity.oCity.QRSTUVWXYZ[letter] = [];
- Vcity.oCity.QRSTUVWXYZ[letter].push(match[1]);
- }
- /* 热门城市 前16条 */
- if(i<16){
- if(!Vcity.oCity.hot['hot']) Vcity.oCity.hot['hot'] = [];
- Vcity.oCity.hot['hot'].push(match[1]);
- }
- }
- }
- })();
三、然后先照着淘宝旅行里面的样子弄出HTML与CSS;这里略过。
四、然后开始建立CitySelector构造函数,根据城市对象,构建生成DOM对象,在按照相应的事件触发。在生成相应的按照A\B\C\D……分组的时候遇到一个
关于排序的问题,我的对象格式是这样的ABCDEFGH:{a:[1,2,3],b:[1,2,3],c:[1,2,3]},里面的小数组要按照字母的顺序排序,但是我用for……in循环生成
出来是乱的,咨询了群里的高人后,处理方法如下:这里单独把KEY拿出来组成一个数组,然后排序后,在根据数组的值作为KEY值,来读取对象!
- sortKey=[];
- for(ckey in oCity[key]){
- sortKey.push(ckey);
- // ckey按照ABCDEDG顺序排序
- sortKey.sort();
- }
- for(var j=0,k = sortKey.length;j<k;j++){
- odl = document.createElement('dl');
- odt = document.createElement('dt');
- odd = document.createElement('dd');
- odt.innerHTML = sortKey[j] == 'hot'?' ':sortKey[j];
- odda = [];
- for(var i=0,n=oCity[key][sortKey[j]].length;i<n;i++){
- str = '<a href="#">' + oCity[key][sortKey[j]][i] + '</a>';
- odda.push(str);
- }
五、鼠标上下键移动选择城市的处理方法:在城市弹出后记录一个this.count = 0;然后再获取上下键的按键事件中分别对count值加一或者减一,
当然count的***值不能大于筛选出来的城市数组的长度,超过长度后归0,小于0后赋值***值,然后把this.count的值,来作为数组的标获取相应的城市
项:
- switch(keycode){
- case 40: //向下箭头↓
- this.count++;
- if(this.count > len-1) this.count = 0;
- for(var i=0;i<len;i++){
- Vcity._m.removeClass('on',lis[i]);
- }
- Vcity._m.addClass('on',lis[this.count]);
- break;
- case 38: //向上箭头↑
- this.count--;
- if(this.count<0) this.count = len-1;
- for(i=0;i<len;i++){
- Vcity._m.removeClass('on',lis[i]);
- }
- Vcity._m.addClass('on',lis[this.count]);
- break;
- case 13: // enter键
- this.input.value = Vcity.regExChiese.exec(lis[this.count].innerHTML)[0];
- Vcity._m.addClass('hide',this.ul);
- Vcity._m.addClass('hide',this.ul);
- /* IE6 */
- Vcity._m.addClass('hide',this.myIframe);
- break;
- default:
- break;
- }
六、IE中对SELECT的遮挡也是一个增加代码的地方,因为城市弹出框的大小是变化的,然后下拉的城市列也是根据筛选出来的值而变化,所以得每操作一个变化的
地方的时候就重新给iframe设置长度和宽度,苦逼的处理方法啊,所以就多了这样一个方法,然后在改变尺寸的时候,应用一下就可以了。
- /* IE6的改变遮罩SELECT 的 IFRAME尺寸大小 */
- changeIframe:function(){
- if(!this.isIE6)return;
- this.myIframe.style.width = this.rootDiv.offsetWidth + 'px';
- this.myIframe.style.height = this.rootDiv.offsetHeight + 'px';
- },
7、弹出框的取消问题,这个问题最开始我是设置document的click事件关闭层,然后再弹出的层上阻止click事件的冒泡,但是这样两个层有同时出现的可能,
如这个反例:http://www.cnblogs.com/NNUF/archive/2012/06/24/2560557.html ; 这里要感谢一下JS丛林群里面的‘搞搞破鞋’同学的方法,取消INPUT对
click的冒泡,然后关键是如下红色字体:
- // 设置点击文档隐藏弹出的城市选择框
- Vcity._m.on(document, 'click', function (event) {
- event = Vcity._m.getEvent(event);
- var target = Vcity._m.getTarget(event);
- if(target == that.input) return false;
- //console.log(target.className);
- if (that.cityBox)Vcity._m.addClass('hide', that.cityBox);
- if (that.ul)Vcity._m.addClass('hide', that.ul);
- if(that.myIframe)Vcity._m.addClass('hide',that.myIframe);
- });
8、输入框输入拼音或者文字或者拼音首字母筛选城市,这个就是直接用正则表达式在最开始的数组里面筛选数据即可:
- var reg = new RegExp("^" + value + "|\\|" + value, 'gi');
- var searchResult = [];
- for (var i = 0, n = Vcity.allCity.length; i < n; i++) {
- if (reg.test(Vcity.allCity[i])) {
- var match = Vcity.regEx.exec(Vcity.allCity[i]);
- if (searchResult.length !== 0) {
- str = '<li><b class="cityname">' + match[1] + '</b><b class="cityspell">' + match[2] + '</b></li>';
- } else {
- str = '<li class="on"><b class="cityname">' + match[1] + '</b><b class="cityspell">' + match[2] + '</b></li>';
- }
- searchResult.push(str);
- }
- }
#p#
然后总的JS代码如下:
- View Code
- /* *
- * ---------------------------------------- *
- * 城市选择组件 v1.0
- * Author: VVG
- * QQ: 83816819
- * Mail: mysheller@163.com
- * http://www.cnblogs.com/NNUF/
- * ---------------------------------------- *
- * Date: 2012-07-10
- * ---------------------------------------- *
- * */
- /* *
- * 全局空间 Vcity
- * */
- var Vcity = {};
- /* *
- * 静态方法集
- * @name _m
- * */
- Vcity._m = {
- /* 选择元素 */
- $:function (arg, context) {
- var tagAll, n, eles = [], i, sub = arg.substring(1);
- context = context || document;
- if (typeof arg == 'string') {
- switch (arg.charAt(0)) {
- case '#':
- return document.getElementById(sub);
- break;
- case '.':
- if (context.getElementsByClassName) return context.getElementsByClassName(sub);
- tagAll = Vcity._m.$('*', context);
- n = tagAll.length;
- for (i = 0; i < n; i++) {
- if (tagAll[i].className.indexOf(sub) > -1) eles.push(tagAll[i]);
- }
- return eles;
- break;
- default:
- return context.getElementsByTagName(arg);
- break;
- }
- }
- },
- /* 绑定事件 */
- on:function (node, type, handler) {
- node.addEventListener ? node.addEventListener(type, handler, false) : node.attachEvent('on' + type, handler);
- },
- /* 获取事件 */
- getEvent:function(event){
- return event || window.event;
- },
- /* 获取事件目标 */
- getTarget:function(event){
- return event.target || event.srcElement;
- },
- /* 获取元素位置 */
- getPos:function (node) {
- var scrollx = document.documentElement.scrollLeft || document.body.scrollLeft,
- scrollt = document.documentElement.scrollTop || document.body.scrollTop;
- var pos = node.getBoundingClientRect();
- return {top:pos.top + scrollt, right:pos.right + scrollx, bottom:pos.bottom + scrollt, left:pos.left + scrollx }
- },
- /* 添加样式名 */
- addClass:function (c, node) {
- if(!node)return;
- node.className = Vcity._m.hasClass(c,node) ? node.className : node.className + ' ' + c ;
- },
- /* 移除样式名 */
- removeClass:function (c, node) {
- var reg = new RegExp("(^|\\s+)" + c + "(\\s+|$)", "g");
- if(!Vcity._m.hasClass(c,node))return;
- node.className = reg.test(node.className) ? node.className.replace(reg, '') : node.className;
- },
- /* 是否含有CLASS */
- hasClass:function (c, node) {
- if(!node || !node.className)return false;
- return node.className.indexOf(c)>-1;
- },
- /* 阻止冒泡 */
- stopPropagation:function (event) {
- event = event || window.event;
- event.stopPropagation ? event.stopPropagation() : event.cancelBubble = true;
- },
- /* 去除两端空格 */
- trim:function (str) {
- return str.replace(/^\s+|\s+$/g,'');
- }
- };
- /* 所有城市数据,可以按照格式自行添加(北京|beijing|bj),前16条为热门城市 */
- Vcity.allCity = ['北京|beijing|bj','上海|shanghai|sh', '重庆|chongqing|cq', '深圳|shenzhen|sz', '广州|guangzhou|gz', '杭州|hangzhou|hz',
- '南京|nanjing|nj', '苏州|shuzhou|sz', '天津|tianjin|tj', '成都|chengdu|cd', '南昌|nanchang|nc', '三亚|sanya|sy','青岛|qingdao|qd',
- '厦门|xiamen|xm', '西安|xian|xa','长沙|changsha|cs','合肥|hefei|hf','西藏|xizang|xz', '内蒙古|neimenggu|nmg', '安庆|anqing|aq', '阿泰勒|ataile|atl', '安康|ankang|ak',
- '阿克苏|akesu|aks', '包头|baotou|bt', '北海|beihai|bh', '百色|baise|bs','保山|baoshan|bs', '长治|changzhi|cz', '长春|changchun|cc', '常州|changzhou|cz', '昌都|changdu|cd',
- '朝阳|chaoyang|cy', '常德|changde|cd', '长白山|changbaishan|cbs', '赤峰|chifeng|cf', '大同|datong|dt', '大连|dalian|dl', '达县|daxian|dx', '东营|dongying|dy', '大庆|daqing|dq', '丹东|dandong|dd',
- '大理|dali|dl', '敦煌|dunhuang|dh', '鄂尔多斯|eerduosi|eeds', '恩施|enshi|es', '福州|fuzhou|fz', '阜阳|fuyang|fy', '贵阳|guiyang|gy',
- '桂林|guilin|gl', '广元|guangyuan|gy', '格尔木|geermu|gem', '呼和浩特|huhehaote|hhht', '哈密|hami|hm',
- '黑河|heihe|hh', '海拉尔|hailaer|hle', '哈尔滨|haerbin|heb', '海口|haikou|hk', '黄山|huangshan|hs', '邯郸|handan|hd',
- '汉中|hanzhong|hz', '和田|hetian|ht', '晋江|jinjiang|jj', '锦州|jinzhou|jz', '景德镇|jingdezhen|jdz',
- '嘉峪关|jiayuguan|jyg', '井冈山|jinggangshan|jgs', '济宁|jining|jn', '九江|jiujiang|jj', '佳木斯|jiamusi|jms', '济南|jinan|jn',
- '喀什|kashi|ks', '昆明|kunming|km', '康定|kangding|kd', '克拉玛依|kelamayi|klmy', '库尔勒|kuerle|kel', '库车|kuche|kc', '兰州|lanzhou|lz',
- '洛阳|luoyang|ly', '丽江|lijiang|lj', '林芝|linzhi|lz', '柳州|liuzhou|lz', '泸州|luzhou|lz', '连云港|lianyungang|lyg', '黎平|liping|lp',
- '连成|liancheng|lc', '拉萨|lasa|ls', '临沧|lincang|lc', '临沂|linyi|ly', '芒市|mangshi|ms', '牡丹江|mudanjiang|mdj', '满洲里|manzhouli|mzl', '绵阳|mianyang|my',
- '梅县|meixian|mx', '漠河|mohe|mh', '南充|nanchong|nc', '南宁|nanning|nn', '南阳|nanyang|ny', '南通|nantong|nt', '那拉提|nalati|nlt',
- '宁波|ningbo|nb', '攀枝花|panzhihua|pzh', '衢州|quzhou|qz', '秦皇岛|qinhuangdao|qhd', '庆阳|qingyang|qy', '齐齐哈尔|qiqihaer|qqhe',
- '石家庄|shijiazhuang|sjz', '沈阳|shenyang|sy', '思茅|simao|sm', '铜仁|tongren|tr', '塔城|tacheng|tc', '腾冲|tengchong|tc', '台州|taizhou|tz',
- '通辽|tongliao|tl', '太原|taiyuan|ty', '威海|weihai|wh', '梧州|wuzhou|wz', '文山|wenshan|ws', '无锡|wuxi|wx', '潍坊|weifang|wf', '武夷山|wuyishan|wys', '乌兰浩特|wulanhaote|wlht',
- '温州|wenzhou|wz', '乌鲁木齐|wulumuqi|wlmq', '万州|wanzhou|wz', '乌海|wuhai|wh', '兴义|xingyi|xy', '西昌|xichang|xc', '襄樊|xiangfan|xf',
- '西宁|xining|xn', '锡林浩特|xilinhaote|xlht', '西双版纳|xishuangbanna|xsbn', '徐州|xuzhou|xz', '义乌|yiwu|yw', '永州|yongzhou|yz', '榆林|yulin|yl', '延安|yanan|ya', '运城|yuncheng|yc',
- '烟台|yantai|yt', '银川|yinchuan|yc', '宜昌|yichang|yc', '宜宾|yibin|yb', '盐城|yancheng|yc', '延吉|yanji|yj', '玉树|yushu|ys', '伊宁|yining|yn', '珠海|zhuhai|zh', '昭通|zhaotong|zt',
- '张家界|zhangjiajie|zjj', '舟山|zhoushan|zs', '郑州|zhengzhou|zz', '中卫|zhongwei|zw', '芷江|zhijiang|zj', '湛江|zhanjiang|zj'];
- /* 正则表达式 筛选中文城市名、拼音、首字母 */
- Vcity.regEx = /^([\u4E00-\u9FA5\uf900-\ufa2d]+)\|(\w+)\|(\w)\w*$/i;
- Vcity.regExChiese = /([\u4E00-\u9FA5\uf900-\ufa2d]+)/;
- /* *
- * 格式化城市数组为对象oCity,按照a-h,i-p,q-z,hot热门城市分组:
- * {HOT:{hot:[]},ABCDEFGH:{a:[1,2,3],b:[1,2,3]},IJKLMNOP:{i:[1.2.3],j:[1,2,3]},QRSTUVWXYZ:{}}
- * */
- (function () {
- var citys = Vcity.allCity, match, letter,
- regEx = Vcity.regEx,
- reg2 = /^[a-h]$/i, reg3 = /^[i-p]$/i, reg4 = /^[q-z]$/i;
- if (!Vcity.oCity) {
- Vcity.oCity = {hot:{},ABCDEFGH:{}, IJKLMNOP:{}, QRSTUVWXYZ:{}};
- //console.log(citys.length);
- for (var i = 0, n = citys.length; i < n; i++) {
- match = regEx.exec(citys[i]);
- letter = match[3].toUpperCase();
- if (reg2.test(letter)) {
- if (!Vcity.oCity.ABCDEFGH[letter]) Vcity.oCity.ABCDEFGH[letter] = [];
- Vcity.oCity.ABCDEFGH[letter].push(match[1]);
- } else if (reg3.test(letter)) {
- if (!Vcity.oCity.IJKLMNOP[letter]) Vcity.oCity.IJKLMNOP[letter] = [];
- Vcity.oCity.IJKLMNOP[letter].push(match[1]);
- } else if (reg4.test(letter)) {
- if (!Vcity.oCity.QRSTUVWXYZ[letter]) Vcity.oCity.QRSTUVWXYZ[letter] = [];
- Vcity.oCity.QRSTUVWXYZ[letter].push(match[1]);
- }
- /* 热门城市 前16条 */
- if(i<16){
- if(!Vcity.oCity.hot['hot']) Vcity.oCity.hot['hot'] = [];
- Vcity.oCity.hot['hot'].push(match[1]);
- }
- }
- }
- })();
- /* 城市HTML模板 */
- Vcity._template = [
- '<p class="tip">热门城市(支持汉字/拼音)</p>',
- '<ul>',
- '<li class="on">热门城市</li>',
- '<li>ABCDEFGH</li>',
- '<li>IJKLMNOP</li>',
- '<li>QRSTUVWXYZ</li>',
- '</ul>'
- ];
- /* *
- * 城市控件构造函数
- * @CitySelector
- * */
- Vcity.CitySelector = function () {
- this.initialize.apply(this, arguments);
- };
- Vcity.CitySelector.prototype = {
- constructor:Vcity.CitySelector,
- /* 初始化 */
- initialize :function (options) {
- var input = options.input;
- this.input = Vcity._m.$('#'+ input);
- this.inputEvent();
- },
- /* *
- * @createWarp
- * 创建城市BOX HTML 框架
- * */
- createWarp:function(){
- var inputPos = Vcity._m.getPos(this.input);
- var div = this.rootDiv = document.createElement('div');
- var that = this;
- // 设置DIV阻止冒泡
- Vcity._m.on(this.rootDiv,'click',function(event){
- Vcity._m.stopPropagation(event);
- });
- // 设置点击文档隐藏弹出的城市选择框
- Vcity._m.on(document, 'click', function (event) {
- event = Vcity._m.getEvent(event);
- var target = Vcity._m.getTarget(event);
- if(target == that.input) return false;
- //console.log(target.className);
- if (that.cityBox)Vcity._m.addClass('hide', that.cityBox);
- if (that.ul)Vcity._m.addClass('hide', that.ul);
- if(that.myIframe)Vcity._m.addClass('hide',that.myIframe);
- });
- div.className = 'citySelector';
- div.style.position = 'absolute';
- div.style.left = inputPos.left + 'px';
- div.style.top = inputPos.bottom + 'px';
- div.style.zIndex = 999999;
- // 判断是否IE6,如果是IE6需要添加iframe才能遮住SELECT框
- var isIe = (document.all) ? true : false;
- var isIE6 = this.isIE6 = isIe && !window.XMLHttpRequest;
- if(isIE6){
- var myIframe = this.myIframe = document.createElement('iframe');
- myIframe.frameborder = '0';
- myIframe.src = 'about:blank';
- myIframe.style.position = 'absolute';
- myIframe.style.zIndex = '-1';
- this.rootDiv.appendChild(this.myIframe);
- }
- var childdiv = this.cityBox = document.createElement('div');
- childdiv.className = 'cityBox';
- childdiv.id = 'cityBox';
- childdiv.innerHTML = Vcity._template.join('');
- var hotCity = this.hotCity = document.createElement('div');
- hotCity.className = 'hotCity';
- childdiv.appendChild(hotCity);
- div.appendChild(childdiv);
- this.createHotCity();
- },
- /* *
- * @createHotCity
- * TAB下面DIV:hot,a-h,i-p,q-z 分类HTML生成,DOM操作
- * {HOT:{hot:[]},ABCDEFGH:{a:[1,2,3],b:[1,2,3]},IJKLMNOP:{},QRSTUVWXYZ:{}}
- **/
- createHotCity:function(){
- var odiv,odl,odt,odd,odda=[],str,key,ckey,sortKey,regEx = Vcity.regEx,
- oCity = Vcity.oCity;
- for(key in oCity){
- odiv = this[key] = document.createElement('div');
- // 先设置全部隐藏hide
- odiv.className = key + ' ' + 'cityTab hide';
- sortKey=[];
- for(ckey in oCity[key]){
- sortKey.push(ckey);
- // ckey按照ABCDEDG顺序排序
- sortKey.sort();
- }
- for(var j=0,k = sortKey.length;j<k;j++){
- odl = document.createElement('dl');
- odt = document.createElement('dt');
- odd = document.createElement('dd');
- odt.innerHTML = sortKey[j] == 'hot'?' ':sortKey[j];
- odda = [];
- for(var i=0,n=oCity[key][sortKey[j]].length;i<n;i++){
- str = '<a href="javascript:">' + oCity[key][sortKey[j]][i] + '</a>';
- odda.push(str);
- }
- odd.innerHTML = odda.join('');
- odl.appendChild(odt);
- odl.appendChild(odd);
- odiv.appendChild(odl);
- }
- // 移除热门城市的隐藏CSS
- Vcity._m.removeClass('hide',this.hot);
- this.hotCity.appendChild(odiv);
- }
- document.body.appendChild(this.rootDiv);
- /* IE6 */
- this.changeIframe();
- this.tabChange();
- this.linkEvent();
- },
- /* *
- * tab按字母顺序切换
- * @ tabChange
- * */
- tabChange:function(){
- var lis = Vcity._m.$('li',this.cityBox);
- var divs = Vcity._m.$('div',this.hotCity);
- var that = this;
- for(var i=0,n=lis.length;i<n;i++){
- lis[i].index = i;
- lis[i].onclick = function(){
- for(var j=0;j<n;j++){
- Vcity._m.removeClass('on',lis[j]);
- Vcity._m.addClass('hide',divs[j]);
- }
- Vcity._m.addClass('on',this);
- Vcity._m.removeClass('hide',divs[this.index]);
- /* IE6 改变TAB的时候 改变Iframe 大小*/
- that.changeIframe();
- };
- }
- },
- /* *
- * 城市LINK事件
- * @linkEvent
- * */
- linkEvent:function(){
- var links = Vcity._m.$('a',this.hotCity);
- var that = this;
- for(var i=0,n=links.length;i<n;i++){
- links[i].onclick = function(){
- that.input.value = this.innerHTML;
- Vcity._m.addClass('hide',that.cityBox);
- /* 点击城市名的时候隐藏myIframe */
- Vcity._m.addClass('hide',that.myIframe);
- }
- }
- },
- /* *
- * INPUT城市输入框事件
- * @inputEvent
- * */
- inputEvent:function(){
- var that = this;
- Vcity._m.on(this.input,'click',function(event){
- event = event || window.event;
- if(!that.cityBox){
- that.createWarp();
- }else if(!!that.cityBox && Vcity._m.hasClass('hide',that.cityBox)){
- // slideul 不存在或者 slideul存在但是是隐藏的时候 两者不能共存
- if(!that.ul || (that.ul && Vcity._m.hasClass('hide',that.ul))){
- Vcity._m.removeClass('hide',that.cityBox);
- /* IE6 移除iframe 的hide 样式 */
- //alert('click');
- Vcity._m.removeClass('hide',that.myIframe);
- that.changeIframe();
- }
- }
- });
- Vcity._m.on(this.input,'focus',function(){
- that.input.select();
- if(that.input.value == '城市名') that.input.value = '';
- });
- Vcity._m.on(this.input,'blur',function(){
- if(that.input.value == '') that.input.value = '城市名';
- });
- Vcity._m.on(this.input,'keyup',function(event){
- event = event || window.event;
- var keycode = event.keyCode;
- Vcity._m.addClass('hide',that.cityBox);
- that.createUl();
- /* 移除iframe 的hide 样式 */
- Vcity._m.removeClass('hide',that.myIframe);
- // 下拉菜单显示的时候捕捉按键事件
- if(that.ul && !Vcity._m.hasClass('hide',that.ul) && !that.isEmpty){
- that.KeyboardEvent(event,keycode);
- }
- });
- },
- /* *
- * 生成下拉选择列表
- * @ createUl
- * */
- createUl:function () {
- //console.log('createUL');
- var str;
- var value = Vcity._m.trim(this.input.value);
- // 当value不等于空的时候执行
- if (value !== '') {
- var reg = new RegExp("^" + value + "|\\|" + value, 'gi');
- var searchResult = [];
- for (var i = 0, n = Vcity.allCity.length; i < n; i++) {
- if (reg.test(Vcity.allCity[i])) {
- var match = Vcity.regEx.exec(Vcity.allCity[i]);
- if (searchResult.length !== 0) {
- str = '<li><b class="cityname">' + match[1] + '</b><b class="cityspell">' + match[2] + '</b></li>';
- } else {
- str = '<li class="on"><b class="cityname">' + match[1] + '</b><b class="cityspell">' + match[2] + '</b></li>';
- }
- searchResult.push(str);
- }
- }
- this.isEmpty = false;
- // 如果搜索数据为空
- if (searchResult.length == 0) {
- this.isEmpty = true;
- str = '<li class="empty">对不起,没有找到数据 "<em>' + value + '</em>"</li>';
- searchResult.push(str);
- }
- // 如果slideul不存在则添加ul
- if (!this.ul) {
- var ul = this.ul = document.createElement('ul');
- ul.className = 'cityslide';
- this.rootDiv && this.rootDiv.appendChild(ul);
- // 记录按键次数,方向键
- this.count = 0;
- } else if (this.ul && Vcity._m.hasClass('hide', this.ul)) {
- this.count = 0;
- Vcity._m.removeClass('hide', this.ul);
- }
- this.ul.innerHTML = searchResult.join('');
- /* IE6 */
- this.changeIframe();
- // 绑定Li事件
- this.liEvent();
- }else{
- Vcity._m.addClass('hide',this.ul);
- Vcity._m.removeClass('hide',this.cityBox);
- Vcity._m.removeClass('hide',this.myIframe);
- this.changeIframe();
- }
- },
- /* IE6的改变遮罩SELECT 的 IFRAME尺寸大小 */
- changeIframe:function(){
- if(!this.isIE6)return;
- this.myIframe.style.width = this.rootDiv.offsetWidth + 'px';
- this.myIframe.style.height = this.rootDiv.offsetHeight + 'px';
- },
- /* *
- * 特定键盘事件,上、下、Enter键
- * @ KeyboardEvent
- * */
- KeyboardEvent:function(event,keycode){
- var lis = Vcity._m.$('li',this.ul);
- var len = lis.length;
- switch(keycode){
- case 40: //向下箭头↓
- this.count++;
- if(this.count > len-1) this.count = 0;
- for(var i=0;i<len;i++){
- Vcity._m.removeClass('on',lis[i]);
- }
- Vcity._m.addClass('on',lis[this.count]);
- break;
- case 38: //向上箭头↑
- this.count--;
- if(this.count<0) this.count = len-1;
- for(i=0;i<len;i++){
- Vcity._m.removeClass('on',lis[i]);
- }
- Vcity._m.addClass('on',lis[this.count]);
- break;
- case 13: // enter键
- this.input.value = Vcity.regExChiese.exec(lis[this.count].innerHTML)[0];
- Vcity._m.addClass('hide',this.ul);
- Vcity._m.addClass('hide',this.ul);
- /* IE6 */
- Vcity._m.addClass('hide',this.myIframe);
- break;
- default:
- break;
- }
- },
- /* *
- * 下拉列表的li事件
- * @ liEvent
- * */
- liEvent:function(){
- var that = this;
- var lis = Vcity._m.$('li',this.ul);
- for(var i = 0,n = lis.length;i < n;i++){
- Vcity._m.on(lis[i],'click',function(event){
- event = Vcity._m.getEvent(event);
- var target = Vcity._m.getTarget(event);
- that.input.value = Vcity.regExChiese.exec(target.innerHTML)[0];
- Vcity._m.addClass('hide',that.ul);
- /* IE6 下拉菜单点击事件 */
- Vcity._m.addClass('hide',that.myIframe);
- });
- Vcity._m.on(lis[i],'mouseover',function(event){
- event = Vcity._m.getEvent(event);
- var target = Vcity._m.getTarget(event);
- Vcity._m.addClass('on',target);
- });
- Vcity._m.on(lis[i],'mouseout',function(event){
- event = Vcity._m.getEvent(event);
- var target = Vcity._m.getTarget(event);
- Vcity._m.removeClass('on',target);
- })
- }
- }
- };
调用方法:只需传入需要填写城市的text表单的ID即可,如下:
- var test=new Vcity.CitySelector({input:'citySelect'});
- var test2=new Vcity.CitySelector({input:'citySelect1'});
如有代码某处有好的改进建议,请留言告知,感激不进!
源代码下载:城市选择控件.rar
原文链接:http://www.cnblogs.com/NNUF/archive/2012/07/13/2590877.html
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