最近在工作中需要用到地址选择器，像下面这样的，本想在网上找一个，可是没找到，于是自己写了个jquery插件。

直接上代码吧：

var provinces = {

"A": {

"安徽":["合肥市","芜湖市","蚌埠市","淮南市","马鞍山市","淮北市","铜陵市","安庆市","黄山市","滁州市","阜阳市","宿州市","巢湖市","六安市","亳州市","池州市","宣城市"]

},

"B": {

"北京": ["北京市"]

},

"C": {

"重庆":["重庆市"]

},

"F": {

"福建":["福州市","厦门市","莆田市","三明市","泉州市","漳州市","南平市","龙岩市","宁德市"]

},

"G": {

"甘肃":["兰州市","嘉峪关市","金昌市","白银市","天水市","武威市","张掖市","平凉市","酒泉市","庆阳市","定西市","陇南市","临夏回族自治州","甘南藏族自治州"],

"广东":["广州市","深圳市","珠海市","汕头市","韶关市","佛山市","江门市","湛江市","茂名市","肇庆市","惠州市","梅州市","汕尾市","河源市","阳江市","清远市","东莞市","中山市","潮州市","揭阳市","云浮市"],

"广西":["南宁市","柳州市","桂林市","梧州市","北海市","防城港市","钦州市","贵港市","玉林市","百色市","贺州市","河池市","来宾市","崇左市"],

"贵州":["贵阳市","六盘水市","遵义市","安顺市","铜仁地区","黔西南布依族苗族自治州","毕节地区","黔东南苗族侗族自治州","黔南布依族苗族自治州"]

},

"H": {

"海南":["海口市","三亚市"],

"河北":["石家庄市","唐山市","秦皇岛市","邯郸市","邢台市","保定市","张家口市","承德市","沧州市","廊坊市","衡水市"],

"河南":["郑州市","开封市","洛阳市","平顶山市","安阳市","鹤壁市","新乡市","焦作市","濮阳市","许昌市","漯河市","三门峡市","南阳市","商丘市","信阳市","周口市","驻马店市"],

"黑龙江":["哈尔滨市","齐齐哈尔市","鸡西市","鹤岗市","双鸭山市","大庆市","伊春市","佳木斯市","七台河市","牡丹江市","黑河市","绥化市","大兴安岭地区"],

"湖北":["武汉市","黄石市","十堰市","宜昌市","襄樊市","鄂州市","荆门市","孝感市","荆州市","黄冈市","咸宁市","随州市","恩施土家族苗族自治州","神农架"],

"湖南":["长沙市","株洲市","湘潭市","衡阳市","邵阳市","岳阳市","常德市","张家界市","益阳市","郴州市","永州市","怀化市","娄底市","湘西土家族苗族自治州"]

},

"J": {

"吉林":["长春市","吉林市","四平市","辽源市","通化市","白山市","松原市","白城市","延边朝鲜族自治州"],

"江苏":["南京市","无锡市","徐州市","常州市","苏州市","南通市","连云港市","淮安市","盐城市","扬州市","镇江市","泰州市","宿迁市"],

"江西":["南昌市","景德镇市","萍乡市","九江市","新余市","鹰潭市","赣州市","吉安市","宜春市","抚州市","上饶市"]

},

"L": {

"辽宁":["沈阳市","大连市","鞍山市","抚顺市","本溪市","丹东市","锦州市","营口市","阜新市","辽阳市","盘锦市","铁岭市","朝阳市","葫芦岛市"]

},

"N": {

"内蒙古":["呼和浩特市","包头市","乌海市","赤峰市","通辽市","鄂尔多斯市","呼伦贝尔市","巴彦淖尔市","乌兰察布市","兴安盟","锡林郭勒盟","阿拉善盟"],

"宁夏":["银川市","石嘴山市","吴忠市","固原市","中卫市"]

},

"Q": {

"青海":["西宁市","海东地区","海北藏族自治州","黄南藏族自治州","海南藏族自治州","果洛藏族自治州","玉树藏族自治州","海西蒙古族藏族自治州"]

},

"S": {

"山东":["济南市","青岛市","淄博市","枣庄市","东营市","烟台市","潍坊市","济宁市","泰安市","威海市","日照市","莱芜市","临沂市","德州市","聊城市","滨州市","菏泽市"],

"山西":["太原市","大同市","阳泉市","长治市","晋城市","朔州市","晋中市","运城市","忻州市","临汾市","吕梁市"],

"陕西":["西安市","铜川市","宝鸡市","咸阳市","渭南市","延安市","汉中市","榆林市","安康市","商洛市"],

"上海":["上海市"],

"四川":["成都市","自贡市","攀枝花市","泸州市","德阳市","绵阳市","广元市","遂宁市","内江市","乐山市","南充市","眉山市","宜宾市","广安市","达州市","雅安市","巴中市","资阳市","阿坝藏族羌族自治州","甘孜藏族自治州","凉山彝族自治州"]

},

"T": {

"天津": ["天津市"]

},
"X": {

"西藏":["拉萨市","昌都地区","山南地区","日喀则地区","那曲地区","阿里地区","林芝地区"],

"新疆":["乌鲁木齐市","克拉玛依市","吐鲁番地区","哈密地区","昌吉回族自治州","博尔塔拉蒙古自治州","巴音郭楞蒙古自治州","阿克苏地区","克孜勒苏柯尔克孜自治州","喀什地区","和田地区","伊犁哈萨克自治州","塔城地区","阿勒泰地区","石河子市","阿拉尔市","图木舒克市","五家渠市"]

},

"Y": {

"云南":["昆明市","曲靖市","玉溪市","保山市","昭通市","丽江市","思茅市","临沧市","楚雄彝族自治州","红河哈尼族彝族自治州","文山壮族苗族自治州","西双版纳傣族自治州","大理白族自治州","德宏傣族景颇族自治州","怒江傈僳族自治州","迪庆藏族自治州"]

},

"Z": {

"浙江":["杭州市","宁波市","温州市","嘉兴市","湖州市","绍兴市","金华市","衢州市","舟山市","台州市","丽水市"]

}

};

(function ($, win, doc) {

var CityPicker = function (el, options) {

this.el = $(el);

this.options = options;

this.provinces = provinces;

this.pro = null;

this.city = null;

this.elType = this.el.is('input');

this.init();

};

var p = CityPicker.prototype;

p.init = function () {

this.initEvent();

this.preventPopKeyboard();

};

p.preventPopKeyboard = function () {

if (this.elType) {

this.el.prop("readonly", true);

}

};

p.initEvent = function () {

this.el.on("focus", function (e) {

var pickerBox = $(".picker-box");

if (pickerBox[0]) {

pickerBox.show();

} else {

this.create();

}

}.bind(this));

};

p.create = function () {

this.createCityPickerBox();

this.createProList();

this.proClick();

this.createNavBar();

this.navEvent();

};

p.createCityPickerBox = function () {

var proBox = "<div class='picker-box'></div>";

$("body").append(proBox);

};

p.createProList = function () {

var provinces = this.provinces;

var proBox;

var dl = "";

for (var letterKey in provinces) {

var val = provinces[letterKey];

if (provinces.hasOwnProperty(letterKey)) {

var dt = "<dt id='" + letterKey + "'>" + letterKey + "</dt>";

var dd = "";

for (var proKey in val) {

if (val.hasOwnProperty(proKey)) {

dd += "<dd data-letter=" + letterKey + ">" + proKey + "</dd>";

}

}

dl += "<dl>" + dt + dd + "</dl>";

}

}

proBox = "<section class='pro-picker'>" + dl + "</section>";

$(".picker-box").append(proBox);

};

p.createCityList = function (letter, pro) {

var cities = this.provinces[letter][pro];

var ul, li = "";

cities.forEach(function (city, i) {

li += "<li>" + city + "</li>";

});

ul = "<ul class='city-picker'>" + li + "</ul>";

$(".picker-box").find(".city-picker").remove().end().append(ul);

this.cityClick();

};

p.proClick = function () {

var that = this;

$(".pro-picker").on("click", function (e) {

var target = e.target;

if ($(target).is("dd")) {

that.pro = $(target).html();

var letter = $(target).data("letter");

that.createCityList(letter, that.pro);

$(this).hide();

}

});

};

p.cityClick = function () {

var that = this;

$(".city-picker").on("click", function (e) {

var target = e.target;

if ($(target).is("li")) {

that.city = $(target).html();

if (that.elType) {

that.el.val(that.pro + "-" + that.city);

} else {

that.el.html(that.pro + "-" + that.city);

}

$(".picker-box").hide();

$(".pro-picker").show();

$(this).hide();

}

});

};

p.createNavBar = function () {

var str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

var arr = str.split("");

var a = "";

arr.forEach(function (item, i) {

a += '<a href="#' + item + '">' + item + '</a>';

});

var div = '<div class="navbar">' + a + '</div>';

$(".picker-box").append(div);

};

p.navEvent = function () {

var that = this;

var navBar = $(".navbar");

var width = navBar.find("a").width();

var height = navBar.find("a").height();

navBar.on("touchstart", function (e) {

$(this).addClass("active");

that.createLetterPrompt($(e.target).html());

});

navBar.on("touchmove", function (e) {

e.preventDefault();

var touch = e.originalEvent.touches[0];

var pos = {"x": touch.pageX, "y": touch.pageY};

var x = pos.x, y = pos.y;

$(this).find("a").each(function (i, item) {

var offset = $(item).offset();

var left = offset.left, top = offset.top;

if (x > left && x < (left + width) && y > top && y < (top + height)) {

location.href = item.href;

that.changeLetter($(item).html());

}

});

});

navBar.on("touchend", function () {

$(this).removeClass("active");

$(".prompt").hide();

})

};

p.createLetterPrompt = function (letter) {

var prompt = $(".prompt");

if (prompt[0]) {

prompt.show();

} else {

var span = "<span class='prompt'>" + letter + "</span>";

$(".picker-box").append(span);

}

};

p.changeLetter = function (letter) {

var prompt = $(".prompt");

prompt.html(letter);

};

$.fn.CityPicker = function (options) {

return new CityPicker(this, options);

}

}(window.jQuery, window, document));

代码很简单。这边需要提到的一段代码是：

navBar.on("touchmove", function (e) {

e.preventDefault();

var touch = e.originalEvent.touches[0];

var pos = {"x": touch.pageX, "y": touch.pageY};

var x = pos.x, y = pos.y;

$(this).find("a").each(function (i, item) {

var offset = $(item).offset();

var left = offset.left, top = offset.top;

if (x > left && x < (left + width) && y > top && y < (top + height)) {

location.href = item.href;

that.changeLetter($(item).html());

}

});

});

这段是通过字母导航省份的代码。当手指在字母上滑动时，touchmove事件并不能确定当前的字母是哪个，因为e.target永远是touchstart时的那个字母。所以我不得不通过坐标来判断手指位于哪个字母上，这样就导致一个问题，每次滑动都必须遍历26个字母的坐标，这样效率是非常低的，但是目前我也没有好的办法。

该插件的使用方法非常简单：

// html代码

<input type="text" class="city" />

// js代码

$(".city").CityPicker();

demo： http://demo.jb51.net/js/2016/cityPicker-master/test.html。最好用手机浏览器或者chrome模拟器打开。

以上就是本文章的内容，希望对大家有所帮助