Question

使用Ionic framework，我正在尝试创建一组三个按钮作为单选按钮：

button-group picture

如果我点击早餐，我希望午餐和晚餐回归正常（白色）状态，早餐转为蓝色。

使用我当前的代码，我无法使用此功能，虽然我可以让按钮切换颜色，稍微随机（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工作解决方案，我可以将代码放在JSFidle中。

感谢您的帮助。

注意：我想维护我的active()函数，并尽可能使用ng-class指令，因为我还有很多依赖于此函数的其他代码。

Answer 1

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

Answer 2

这是针对未来Google员工的更灵活的解决方案。

工作人员： 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');
        }
      });
    }
  };
});

一个用法示例：

   <div class="button-bar">
     <a bar-select="button.value"
        ng-repeat="button in clientSideList"
        ng-model="data.clientSide"
     >{{button.text}}</a>
   </div>

Answer 3

这是另一种替代方法，它将其他两种方法结合在一起。它只需要一个＆lt; button-group＆gt;具有以下属性的元素：

ng-model
buttons - 包含'text'和'value'属性的对象数组
button-class - 除了默认的'group-btn'和'group-btn-active'类

.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;
            });
        }
    };
})

示例用法：

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

其中sortOptions是表单的数组：

$scope.sortOptions = [
        { value: 'priority', text: 'Priority' },
        { value: 'duration', text: 'Call Duration' }
    ];

AngularJS - 作为单选按钮的3按钮组

3 个答案:

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