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这篇文章主要介绍了Angularjs自定义指令实现三级联动，选择地理位置，以便以后工作需要可以参考。
Angularjs自定义指令实现三级联动效果图：
<html lang="zh-CN" ng-app="myApp"><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1"><script src="jquery-1.8.3.js"></script><script src="bootstrap.js"></script> <script src="angular1.2.9.js"></script><link rel="stylesheet" href="bootstrap.css" rel="external nofollow" ><style type="text/css">select {width : 116px;}.selectLocation select {display: block;float: left;margin-bottom: 2px;}</style><script type="text/javascript">var myApp = angular.module('myApp', []);myApp.controller('Ctrl', ['$scope', 'utilsService', function($scope, utilsService){$scope.location = '';$scope.$watch('location', function(newValue) {console.log(newValue)console.log(utilsService.isEmptyObj(newValue))})// if (isEmptyObj($scope.location)) {// //error// }}]);myApp.factory("utilsService", function() {return {isEmptyObj : function(obj) {var flag = true;for(var i in obj) {if (obj[i] != '') {flag = false;break;}}return flag;}}})myApp.directive("custLocation", ['$http', function($http) {return {restrict: 'A',scope: {ngModel : '='},templateUrl: 'tmpl.html',link: function(scope, elem, attrs) {scope.country = '';scope.province = '';scope.city = '';scope.detailAddress = '';$http.get("location.json").success(function(data) {scope.countryList = data.country;});scope.$watch('detailAddress', function(newValue) {// console.log(scope.country.name + scope.province.name + scope.city + newValue)scope.ngModel = {"country" : scope.country == null || scope.country == '' ? '' : scope.country.name,"province" : scope.province == null || scope.province == '' ? '' : scope.province.name,"city" : scope.city || '',"detailAddress" : newValue};});scope.changeCountry = function() {if (scope.country == null) {scope.country = '';scope.province = '';scope.city = '';scope.detailAddress = '';scope.ngModel = '';} else {scope.ngModel = {"country" : scope.country.name,"province" : scope.province == null || scope.province == '' ? '' : scope.province.name,"city" : scope.city || '',"detailAddress" : scope.detailAddress};}}scope.changeProvince = function () {scope.ngModel = {"country" : scope.country.name,"province" : scope.province == null || scope.province == '' ? '' : scope.province.name,"city" : scope.city || '',"detailAddress" : scope.detailAddress};}scope.changeCity = function() {scope.ngModel = {"country" : scope.country.name,"province" : scope.province == null || scope.province == '' ? '' : scope.province.name,"city" : scope.city || '',"detailAddress" : scope.detailAddress};}}};}]);</script></head><body ng-controller="Ctrl"><div cust-location ng-model="location"></div></body>
</html>tmpl.html
<div class="selectLocation"><div> <select class="btn btn-info btn-sm" ng-change="changeCountry()" ng-model="country" ng-options="C.name for C in countryList"><option value="">国家</option></select></div> <div> <select class="btn btn-info btn-sm" ng-change="changeProvince()" ng-model="province" ng-options="p.name for p in country.province"><option value="">省份/直轄市</option></select></div><div> <select class="btn btn-info btn-sm" ng-change="changeCity()" ng-model="city" ng-options="c for c in province.city"><option value="">市</option></select> </div><div style="width:348px;"><input type="text" class="form-control" ng-model="detailAddress" placeholder="详细地址" ng-disabled="country=='' || country==null" /></div>
</div>
文章来源：http://www.jb51.net/article/105400.htm