假设你有一个在ul中呈现的数组，每个元素都有一个li，控制器上有一个名为selectedIndex的属性。在AngularJS中，用索引selectedIndex向li中添加类的最好方法是什么?
我目前复制(手工)li代码，并将类添加到li标记之一，并使用ng-show和ng-hide只显示每个索引一个li。
当前回答
如果你有一个应用于很多元素的公共类，你可以创建一个自定义指令来添加这个类，比如ng-show/ng-hide。
这个指令会在按钮被点击时添加类'active'
module.directive('ngActive', ['$animate', function($animate) {
return function(scope, element, attr) {
scope.$watch(attr.ngActive, function ngActiveWatchAction(value){
$animate[value ? 'addClass' : 'removeClass'](element, 'active');
});
};
}]);
更多信息
其他回答
下面是另一个在ng-class不能使用时工作得很好的选项(例如在样式化SVG时):
ng-attr-class="{{someBoolean && 'class-when-true' || 'class-when-false' }}"
(我认为你需要使用最新的不稳定Angular才能使用ng-attr-，我目前使用的是1.1.4)
这里有一个更简单的解决方案:
function MyControl($scope){ $scope.values = ["a","b","c","d","e","f"]; $scope.selectedIndex = -1; $scope.toggleSelect = function(ind){ if( ind === $scope.selectedIndex ){ $scope.selectedIndex = -1; } else{ $scope.selectedIndex = ind; } } $scope.getClass = function(ind){ if( ind === $scope.selectedIndex ){ return "selected"; } else{ return ""; } } $scope.getButtonLabel = function(ind){ if( ind === $scope.selectedIndex ){ return "Deselect"; } else{ return "Select"; } } } .selected { color:red; } <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.1/angular.min.js"></script> <div ng-app ng-controller="MyControl"> <ul> <li ng-class="getClass($index)" ng-repeat="value in values" >{{value}} <button ng-click="toggleSelect($index)">{{getButtonLabel($index)}}</button></li> </ul> <p>Selected: {{selectedIndex}}</p> </div>
我是Angular的新手，但我发现这个可以解决我的问题:
<i class="icon-download" ng-click="showDetails = ! showDetails" ng-class="{'icon-upload': showDetails}"></i>
这将有条件地应用一个基于var的类。 它以默认的icon-download开始，使用ng-class，我检查showDetails的状态，如果为真/假，并应用class icon-upload。它工作得很好。
希望能有所帮助。
这就像一个魅力;)
<ul class="nav nav-pills" ng-init="selectedType = 'return'">
<li role="presentation" ng-class="{'active':selectedType === 'return'}"
ng-click="selectedType = 'return'"><a href="#return">return
</a></li>
<li role="presentation" ng-class="{'active':selectedType === 'oneway'}"
ng-click="selectedType = 'oneway'"><a href="#oneway">oneway
</a></li>
</ul>
我们可以创建一个函数来管理带条件的返回类
<script>
angular.module('myapp', [])
.controller('ExampleController', ['$scope', function ($scope) {
$scope.MyColors = ['It is Red', 'It is Yellow', 'It is Blue', 'It is Green', 'It is Gray'];
$scope.getClass = function (strValue) {
switch(strValue) {
case "It is Red":return "Red";break;
case "It is Yellow":return "Yellow";break;
case "It is Blue":return "Blue";break;
case "It is Green":return "Green";break;
case "It is Gray":return "Gray";break;
}
}
}]);
</script>
然后
<body ng-app="myapp" ng-controller="ExampleController">
<h2>AngularJS ng-class if example</h2>
<ul >
<li ng-repeat="icolor in MyColors" >
<p ng-class="[getClass(icolor), 'b']">{{icolor}}</p>
</li>
</ul>
<hr/>
<p>Other way using : ng-class="{'class1' : expression1, 'class2' : expression2,'class3':expression2,...}"</p>
<ul>
<li ng-repeat="icolor in MyColors">
<p ng-class="{'Red':icolor=='It is Red','Yellow':icolor=='It is Yellow','Blue':icolor=='It is Blue','Green':icolor=='It is Green','Gray':icolor=='It is Gray'}" class="b">{{icolor}}</p>
</li>
</ul>
你可以参考ng-class的完整代码页if example
