访问UI元素

Question

我有这样的HTML：

<select id="common_commonbundle_standard_address_country" 
     ng-model="common_commonbundle_standard_address.country" 
     required="required" 
     tooltip="País" 
     tooltip-trigger="focus" 
     tooltip-placement="right" 
     wv-def="País" 
     wv-cur="" 
     wv-err="Error!" 
     wv-req="The value you selected is not a valid choice" 
     type="text" 
     class="ng-scope ng-dirty ng-valid ng-valid-required"> 
    ... 
</select> 

而且我使用此代码试图common_commonbundle_standard_address.country要监视更改：

$scope.$watch('$scope.common_commonbundle_standard_address.country', function(iso_country) { 
    if (iso_country) 
     $http.get(Routing.generate('states') + iso_country).success(function(data) { 
      if (data.message) { 
       $scope.message = data.message; 
      } else { 
       $scope.states = data; 
      } 
     }).error(function(data, status, headers, config) { 
      if (status == '500') { 
       $scope.message = "No hay conexión con el servidor."; 
      } 
     }); 
}); 

但它不工作，有什么我做错了？

新增控制器

app.controller（ 'NewSeller'，函数（$范围，$ HTTP，$ routeParams，$ fileUploader）{

$scope.section = $routeParams.section == undefined ? 'main' : $routeParams.section; 
$scope.aaaa = 'sdsdsdsd'; 

switch ($scope.section) { 
    case 'registro': 
     { 
      $('.seller-menu').animate({left: -230}, 300); 
      $scope.section = 'primer-paso'; 
      break; 
     } 
    case 'segundo-paso': 
     { 
      break; 
     } 
    case 'main': 
    default: 
     { 
      break; 
     } 
} 

// Add watch for states 
$scope.$watch('common_commonbundle_standard_address.country', 
     function(iso_country) { 
      $http.get(Routing.generate('states') + iso_country).success(function(data) { 
       if (data.message) { 
        $scope.message = data.message; 
       } else { 
        $scope.states = data; 
       } 
      }).error(function(data, status, headers, config) { 
       if (status == '500') { 
        $scope.message = "No hay conexión con el servidor."; 
       } 
      }); 
     }, true); 

}）;

Answer 1

您不需要在您的手表表达中包含。您可能还想尝试使用对象相等性：

$scope.$watch('common_commonbundle_standard_address.country', 
    function(country) { 
     // Do some work here 
    }, true);