0

如果我有以下代码，如何在元素上切换活动类？

<div class="searchandfilter">
    <span ng-repeat="taxonomy in taxonomies" class="tab-controller" ng-class="{'active': $index == 0}">
        <ul>
            <li class="tab" ng-click="onClickTab(taxonomy)">{{taxonomy.name}}</li>
        </ul>
        <span class="tab-content">
            <span ng-repeat="child in taxonomy.children">
                <input type="checkbox" checked="child.value" />{{child.name}}
            </span>
        </span>
    </span>

在加载时，我需要将第一个tab-conroller span 设置为活动，这现在是正确的，但我无法在单击时切换活动类。选项卡的数量是动态的，因此可以是 1 或 10。目前它会生成如下所示的选项卡：

<span class="tab-controller ng-scope active" ng-class="{'active': $index == 0}" ng-repeat="taxonomy in taxonomies">
<ul>
<li class="tab ng-binding" ng-click="onClickTab(taxonomy)">Tab 1</li>
</ul>
</span>

<span class="tab-controller ng-scope" ng-class="{'active': $index == 0}" ng-repeat="taxonomy in taxonomies">
<ul>
<li class="tab ng-binding" ng-click="onClickTab(taxonomy)">Tab2</li>
</ul>
</span>
4

3 回答 3

1

您需要在选项卡中拥有一些属性，以便能够与 ng-repeat 中的 $index 进行比较。

例如：

<div class="tab-controller" ng-class="{'active': $index == currentTab}" ng-repeat="taxonomy in taxonomies">
    <ul>
        <li class="tab" ng-click="onClickTab(taxonomy.tab)">{{ taxonomy.name }}</li>
    </ul>
</div>

分类法应该是一组对象，例如：

var taxonomies = [
    { id: 0, name: 'Tab 1', tab: 'whatever you need here'},
    { id: 1, name: 'Tab 2', tab: 'whatever you need here'},
    { id: 2, name: 'Tab 3', tab: 'whatever you need here'}
];

当您调用 onClickTab 函数时，它应该将变量 scope.currentTab 设置为单击选项卡的 id。

希望能帮助到你。

于 2015-05-20T12:15:29.273 回答
1

您可以通过传递索引并设置范围变量来做到这一点。

var app = angular.module('app', []);

app.controller('myController', function($scope) {
  $scope.taxonomies = [
    {name: 'a', children: [{name: 'a', value: false}]}, 
    {name: 'b', children: [{name: 'a', value: true}, 
                           {name: 'b', value: false}]}
  ];
  
  $scope.onClickTab = function(idx) {
    $scope.selectedIndex = idx;
  };
  
  $scope.selectedIndex = 0;
});
.active {
  color: green;
  font-weight: bold;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>
<div ng-app='app' ng-controller='myController'>

  <div class="searchandfilter">
    <span ng-repeat="taxonomy in taxonomies" class="tab-controller" ng-class="{'active': $index == selectedIndex}">
        <ul>
            <li class="tab" ng-click="onClickTab($index)">{{taxonomy.name}}</li>
        </ul>
        <span class="tab-content">
            <span ng-repeat="child in taxonomy.children">
                <input type="checkbox" ng-model="child.value">{{child.name}}
            </span>
    </span>
    </span>
  </div>
</div>

这种方法的问题是，如果分类法发生变化， selectedIndex 可能不再与选定的选项卡匹配，因此您可以跟踪整个对象，而不是跟踪索引：

var app = angular.module('app', []);

app.controller('myController', function($scope) {
  $scope.taxonomies = [
    {name: 'a', children: [{name: 'a', value: false}]}, 
    {name: 'b', children: [{name: 'a', value: true}, 
                           {name: 'b', value: false}]}
  ];
  
  $scope.onClickTab = function(selected) {
    $scope.selected = selected;
  };
  
  $scope.selected = $scope.taxonomies[0];
});
.active {
  color: green;
  font-weight: bold;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>
<div ng-app='app' ng-controller='myController'>

  <div class="searchandfilter">
    <span ng-repeat="taxonomy in taxonomies" class="tab-controller" ng-class="{'active': taxonomy === selected}">
        <ul>
            <li class="tab" ng-click="onClickTab(taxonomy)">{{taxonomy.name}}</li>
        </ul>
        <span class="tab-content">
            <span ng-repeat="child in taxonomy.children">
                <input type="checkbox" ng-model="child.value">{{child.name}}
            </span>
    </span>
    </span>
  </div>
</div>

于 2015-05-20T12:33:47.650 回答
0

对不起，如果我错了，试试这个

http://plnkr.co/edit/FdueM4rAvd4k6hClK1HR?p=preview

你的 html 将是

<html>

<head>
  <script data-require="angular.js@*" data-semver="1.4.0-beta.6" src="https://code.angularjs.org/1.4.0-beta.6/angular.js"></script>
  <link rel="stylesheet" href="style.css" />
  <script src="script.js"></script>
</head>

<body ng-app="app">

  <div class="searchandfilter" ng-controller="tab-controller">

    <span ng-repeat="taxonomy in taxonomies">
        <ul  ng-class="{'active': $index == selectedIndex}">
            <li class="tab" ng-click="onClickTab(taxonomy.id)">{{taxonomy.name}}
              <br/>
                <span class="tab-content">
                  <span ng-repeat="child in taxonomy.children">
                      <input type="checkbox" ng-model="child.value" />{{child.name}} 
                  </span>
                </span>
            </li>
        </ul>
    </span>
  </div>

</body>
</html>

角度js代码将是

  var app = angular.module("app",[]);
    app.controller('tab-controller',['$scope',function($scope){

    $scope.taxonomies = [
    { id: 0, name: 'hello' , children:[{name:"test1",value:true},{name:"test2",value:false}]},
    { id: 1, name: 'how' , children:[{name:"test5", value: false}]},
    { id: 2, name: 'are you',children:[{name:"test4",value: true}]}
    ];

    $scope.onClickTab= function(x){
      $scope.selectedIndex= x;
    };

  }]);

CSS代码将是

.active{
  background-color:green;
}

body {
    background-color: yellow;
}
于 2015-05-20T12:56:55.823 回答