jQuery 入门教程(23): jQuery UI Autocomplete示例(一)
AutoComplete 在获取焦点后,随着用户键入的内容,可以在预订的数据源中查找和已输入的内容相匹配的内容列表供用户选择。
这可以用作之前输入过的内容也可以用作自动填充相关内容,比如根据城市名,自动填充邮编等。
你可以使用本地数据源或是远程数据源,本地数据一般使用小数据集合,比如包含50条记录的通讯录,远程数据源一般为保护大量记录的数据库。
基本用法
本例为使用AutoComplete的基本用法,通过本地数据源(数组)定义一组语言列表,用户输入字母后,包含该字母的语言会作为列表显示出来:
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<!doctype html> |
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< html lang = "en" > |
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< head > |
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< meta charset = "utf-8" /> |
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< title >jQuery UI Demos</ title > |
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< link rel = "stylesheet" href = "themes/trontastic/jquery-ui.css" /> |
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< script src = "scripts/jquery-1.9.1.js" ></ script > |
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< script src = "scripts/jquery-ui-1.10.1.custom.js" ></ script > |
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< script > |
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$(function () {
|
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var availableTags = [ |
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"ActionScript", |
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"AppleScript", |
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"Asp", |
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"BASIC", |
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"C", |
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"C++", |
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"Clojure", |
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"COBOL", |
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"ColdFusion", |
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"Erlang", |
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"Fortran", |
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"Groovy", |
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"Haskell", |
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"Java", |
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"JavaScript", |
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"Lisp", |
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"Perl", |
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"PHP", |
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"Python", |
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"Ruby", |
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"Scala", |
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"Scheme" |
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]; |
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$("#tags").autocomplete({
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source: availableTags |
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}); |
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}); |
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</ script > |
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</ head > |
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< body > |
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< div class = "ui-widget" > |
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< label for = "tags" >Tags: </ label > |
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< input id = "tags" /> |
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</ div > |
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</ body > |
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</ html > |
语调支持
某些语言支持语调字符,比如Jörn 中的ö,希望在输入o时,也能显示包含ö的内容,AutoComplete支持使用function来定义Source属性:
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<!doctype html> |
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< html lang = "en" > |
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< head > |
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< meta charset = "utf-8" /> |
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< title >jQuery UI Demos</ title > |
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< link rel = "stylesheet" href = "themes/trontastic/jquery-ui.css" /> |
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< script src = "scripts/jquery-1.9.1.js" ></ script > |
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< script src = "scripts/jquery-ui-1.10.1.custom.js" ></ script > |
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< script > |
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$(function () {
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var names = ["Jörn Zaefferer", |
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"Scott González", |
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"John Resig"]; |
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var accentMap = {
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"á": "a", |
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"ö": "o" |
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}; |
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var normalize = function (term) {
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var ret = ""; |
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for (var i = 0; i < term.length ; i++) {
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ret += accentMap[term.charAt(i)] |
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|| term.charAt(i); |
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} |
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return ret; |
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}; |
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$("#developer").autocomplete({
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source: function (request, response) {
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var matcher |
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= new RegExp($.ui.autocomplete |
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.escapeRegex(request.term),"i"); |
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response($.grep(names, function (value) {
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value = value.label |
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|| value.value |
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|| value; |
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return matcher.test(value) |
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|| matcher.test(normalize(value)); |
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})); |
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} |
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}); |
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}); |
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</script> |
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</ head > |
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< body > |
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< div class = "ui-widget" > |
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< form > |
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< label for = "developer" >Developer: </ label > |
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< input id = "developer" /> |
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</ form > |
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</ div > |
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</ body > |
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</ html > |
分类支持
本例是提供简单扩展AutoComplete 组件实现了一个自定义的custom.catcomplete UI组件以支持AutoComplete的分类支持。自定义组件有兴趣的可以参见jQuery 的Widget Factory。一般无需自定义UI组件,如果需要,可以在网站查找是否有人已经实现你需要的UI组件,实在不行才自定义UI组件,使用Widget Factory自定义组件的方法并不十分直观(这是因为JavaScript使用了面向“原型”的面向对象方法,而非通常的使用类的面向对象方法)。
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<!doctype html> |
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< html lang = "en" > |
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< head > |
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< meta charset = "utf-8" /> |
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< title >jQuery UI Demos</ title > |
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< link rel = "stylesheet" href = "themes/trontastic/jquery-ui.css" /> |
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< script src = "scripts/jquery-1.9.1.js" ></ script > |
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< script src = "scripts/jquery-ui-1.10.1.custom.js" ></ script > |
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< style > |
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.ui-autocomplete-category {
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font-weight: bold; |
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padding: .2em .4em; |
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margin: .8em 0 .2em; |
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line-height: 1.5; |
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} |
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</ style > |
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< script > |
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$.widget("custom.catcomplete", $.ui.autocomplete, {
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_renderMenu: function (ul, items) {
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var that = this, |
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currentCategory = ""; |
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$.each(items, function (index, item) {
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if (item.category != currentCategory) {
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ul.append("< li class = 'ui-autocomplete-category' >" |
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+ item.category + "</ li >"); |
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currentCategory = item.category; |
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} |
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that._renderItemData(ul, item); |
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}); |
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} |
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}); |
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</ script > |
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< script > |
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$(function () {
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var data = [ |
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{ label: "anders", category: "" }, |
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{ label: "andreas", category: "" }, |
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{ label: "antal", category: "" }, |
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{ label: "annhhx10", category: "Products" }, |
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{ label: "annk K12", category: "Products" }, |
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{ label: "annttop C13", category: "Products" }, |
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{ label: "anders andersson", category: "People" }, |
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{ label: "andreas andersson", category: "People" }, |
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{ label: "andreas johnson", category: "People" } |
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]; |
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$("#search").catcomplete({
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delay: 0, |
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source: data |
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}); |
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}); |
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</ script > |
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</ head > |
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< body > |
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< label for = "search" >Search: </ label > |
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< input id = "search" /> |
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</ body > |
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</ html > |
其中custom.catcomplete为自定义的UI组件,因此$( “#search” ).catcomplete 使用catcomplete ,而非autocomplete。
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