15

使用Ionic 框架，我试图创建一组三个按钮作为单选按钮：

按钮组图片

如果我点击早餐，我希望午餐和晚餐恢复正常（白色）状态，早餐变成蓝色。

使用我当前的代码，我无法使用此功能，尽管我可以让按钮稍微随机地切换颜色（也许我只是不理解ng-class指令）。

这是我的 HTML 代码：

<div class="bar bar-subheader">
 <div class="button-bar">
   <a class="button" ng-class="{'button-positive' : !isActiveB, 'none': isActiveB}" ng-click="active('breakfast')">Breakfast</a>
   <a class="button" ng-class="{'button-positive' : !isActiveL, 'none': isActiveL}" ng-click="active('lunch')">Lunch</a>
   <a class="button" ng-class="{'button-positive' : !isActiveD, 'none': isActiveD}" ng-click="active('dinner')">Dinner</a>
 </div>
</div>

我的 JS：

$scope.active = function(meal) {

 switch (meal) {
   case 'breakfast':
     $scope.$broadcast('slideBox.setSlide', 0);
     $scope.isActiveB = $scope.isActiveB;
     $scope.isActiveL = !$scope.isActiveL;
     $scope.isActiveD = !$scope.isActiveD;
     break;
   case 'lunch':
     $scope.$broadcast('slideBox.setSlide', 1);
     $scope.isActiveB = !$scope.isActiveB;
     $scope.isActiveL = $scope.isActiveL;
     $scope.isActiveD = !$scope.isActiveD;
     break;
   case 'dinner':
     $scope.$broadcast('slideBox.setSlide', 2);
     $scope.isActiveB = !$scope.isActiveB;
     $scope.isActiveL = !$scope.isActiveL;
     $scope.isActiveD = $scope.isActiveD;
     break;
 }
};

如果您需要更多信息和可行的解决方案，我可以将代码放入 JSFidle。

谢谢你的帮助。

注意：我想维护我的active()函数，并ng-class尽可能使用该指令，因为我有很多其他代码依赖于这个函数。

4

3 回答 3

26

也许这个简化的例子会对你有所帮助：

angular.module('plunker', []).controller('MainCtrl', function($scope) {
    $scope.active = 'breakfast';
    $scope.setActive = function(type) {
        $scope.active = type;
    };
    $scope.isActive = function(type) {
        return type === $scope.active;
    };
});
<link rel="stylesheet" href="http://code.ionicframework.com/0.9.26/css/ionic.min.css">
<script src="http://code.angularjs.org/1.2.13/angular.js"></script>

<div ng-app="plunker" ng-controller="MainCtrl" class="bar bar-subheader">
    <div class="button-bar">
        <a class="button" ng-class="{'button-positive': isActive('breakfast')}" ng-click="setActive('breakfast')">Breakfast</a>
        <a class="button" ng-class="{'button-positive': isActive('lunch')}" ng-click="setActive('lunch')">Lunch</a>
        <a class="button" ng-class="{'button-positive': isActive('dinner')}" ng-click="setActive('dinner')">Dinner</a>
    </div>
</div>

演示：http ://plnkr.co/edit/9HmuTStz70x5KoAvLaP4?p=preview

于 2014-03-07T19:26:00.483 回答
6

这是为未来的 Google 员工提供的更灵活的解决方案。

工作插件： http ://plnkr.co/edit/U2Hvx4?p=preview 

.directive('barSelect',function($parse){
  return {
    restrict: 'A',
    require: 'ngModel',
    scope: {
      model: '=ngModel',
      value: '=barSelect'
    },
    link: function(scope, element, attrs, ngModelCtrl){
      element.addClass('button');
      element.on('click', function(e){
        scope.$apply(function(){
          ngModelCtrl.$setViewValue(scope.value);
        });
      });

      scope.$watch('model', function(newVal){
        element.removeClass('active');
        if (newVal === scope.value){
          element.addClass('active');
        }
      });
    }
  };
});

还有一个使用示例：

   <div class="button-bar">
     <a bar-select="button.value"
        ng-repeat="button in clientSideList"
        ng-model="data.clientSide"
     >{{button.text}}</a>
   </div>
于 2014-08-19T11:03:01.073 回答
0

这是另一种结合其他两种方法的替代方法。它只需要一个具有以下属性的 <button-group> 元素：

  • ng模型
  • 按钮 - 包含“文本”和“值”属性的对象数组
  • button-class - 除了默认的 'group-btn' 和 'group-btn-active' 类之外，包含要应用于呈现链接的 CSS 类的可选字符串

.

.directive('buttonGroup',function($parse){
    return {
        restrict: 'E',
        require: 'ngModel',
        scope: {
          model: '=ngModel',
          buttons: '=',
          buttonClass: '='
        },
        template: '<a class="group-btn {{buttonClass}}" ' +
                  '   ng-repeat="button in buttons" ' +
                  '   ng-class="{\'group-btn-active\': isActive(button.value)}" ' +
                  '   ng-click="buttonClicked(button.value)"> ' +
                  '       {{button.text}} ' +
                  '</a>',
        controller: ['$scope', function($scope) {
            $scope.buttonClicked = function(value) {
                $scope.value = value;
            };
            $scope.isActive = function(value) {
                return $scope.value === value;
            };
        }],
        link: function(scope, element, attrs, ngModel) {
            element.on('click', function(e){
                scope.$apply(function(){
                    ngModel.$setViewValue(scope.value);
                });
            });

            scope.$watch('model', function(newVal){
                scope.value = newVal;
            });
        }
    };
})

以及示例用法：

<button-group ng-model="sortOrder" buttons="sortOptions" 
    button-class="'md-button my-other-class'"></button-group>

其中 sortOptions 将是以下形式的数组：

$scope.sortOptions = [
        { value: 'priority', text: 'Priority' },
        { value: 'duration', text: 'Call Duration' }
    ];
于 2016-03-23T23:47:47.897 回答