Angularjs自定义指令实现三级联动选择地理位置

苏生苏米沿

2017-02-13

Angularjs自定义指令实现三级联动效果，先上图

代码

<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.min.js"></script>
 <script src="angular.js"></script>
 <script src="bootstrap.min.js"></script>
 <link rel="stylesheet" href="bootstrap.min.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>

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