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AngularJS API Reference auto auto/service auto/service/$injector auto/service/$provide ng ng/directive ng/directive/a ng/directive/form ng/directive/input ng/directive/input[checkbox] ng/directive/input[date] ng/directive/input[dateTimeLocal] ng/directive/input[email] ng/directive/input[month] ng/directive/input[number] ng/directive/input[radio] ng/directive/input[text] ng/directive/input[time] ng/directive/input[url] ng/directive/input[week] ng/directive/ngApp ng/directive/ngBind ng/directive/ngBindHtml ng/directive/ngBindTemplate ng/directive/ngBlur ng/directive/ngChange ng/directive/ngChecked ng/directive/ngClass ng/directive/ngClassEven ng/directive/ngClassOdd ng/directive/ngClick ng/directive/ngCloak ng/directive/ngController ng/directive/ngCopy ng/directive/ngCsp ng/directive/ngCut ng/directive/ngDblclick ng/directive/ngDisabled ng/directive/ngFocus ng/directive/ngForm ng/directive/ngHide ng/directive/ngHref ng/directive/ngIf ng/directive/ngInclude ng/directive/ngInit ng/directive/ngKeydown ng/directive/ngKeypress ng/directive/ngKeyup ng/directive/ngList ng/directive/ngModel ng/directive/ngModelOptions ng/directive/ngMousedown ng/directive/ngMouseenter ng/directive/ngMouseleave ng/directive/ngMousemove ng/directive/ngMouseover ng/directive/ngMouseup ng/directive/ngNonBindable ng/directive/ngOpen ng/directive/ngPaste ng/directive/ngPluralize ng/directive/ngReadonly ng/directive/ngRepeat ng/directive/ngSelected ng/directive/ngShow ng/directive/ngSrc ng/directive/ngSrcset ng/directive/ngStyle ng/directive/ngSubmit ng/directive/ngSwitch ng/directive/ngTransclude ng/directive/ngValue ng/directive/script ng/directive/select ng/directive/textarea ng/filter ng/filter/currency ng/filter/date ng/filter/filter ng/filter/json ng/filter/limitTo ng/filter/lowercase ng/filter/number ng/filter/orderBy ng/filter/uppercase ng/function ng/function/angular.bind ng/function/angular.bootstrap ng/function/angular.copy ng/function/angular.element ng/function/angular.equals ng/function/angular.extend ng/function/angular.forEach ng/function/angular.fromJson ng/function/angular.identity ng/function/angular.injector ng/function/angular.isArray ng/function/angular.isDate ng/function/angular.isDefined ng/function/angular.isElement ng/function/angular.isFunction ng/function/angular.isNumber ng/function/angular.isObject ng/function/angular.isString ng/function/angular.isUndefined ng/function/angular.lowercase ng/function/angular.module ng/function/angular.noop ng/function/angular.toJson ng/function/angular.uppercase ng/object ng/object/angular.version ng/provider ng/provider/$animateProvider ng/provider/$compileProvider ng/provider/$controllerProvider ng/provider/$filterProvider ng/provider/$httpProvider ng/provider/$interpolateProvider ng/provider/$locationProvider ng/provider/$logProvider ng/provider/$parseProvider ng/provider/$rootScopeProvider ng/provider/$sceDelegateProvider ng/provider/$sceProvider ng/service ng/service/$anchorScroll ng/service/$animate ng/service/$cacheFactory ng/service/$compile ng/service/$controller ng/service/$document ng/service/$exceptionHandler ng/service/$filter ng/service/$http ng/service/$httpBackend ng/service/$interpolate ng/service/$interval ng/service/$locale ng/service/$location ng/service/$log ng/service/$parse ng/service/$q ng/service/$rootElement ng/service/$rootScope ng/service/$sce ng/service/$sceDelegate ng/service/$templateCache ng/service/$timeout ng/service/$window ng/type ng/type/$cacheFactory.Cache ng/type/$compile.directive.Attributes ng/type/$rootScope.Scope ng/type/angular.Module ng/type/form.FormController ng/type/ngModel.NgModelController ngAnimate ngAnimate/provider ngAnimate/provider/$animateProvider ngAnimate/service ngAnimate/service/$animate ngCookies ngCookies/service ngCookies/service/$cookies ngCookies/service/$cookieStore ngMessages ngMessages/directive ngMessages/directive/ngMessage ngMessages/directive/ngMessages ngMock ngMock/function ngMock/function/angular.mock.dump ngMock/function/angular.mock.inject ngMock/function/angular.mock.module ngMock/object ngMock/object/angular.mock ngMock/provider ngMock/provider/$exceptionHandlerProvider ngMock/service ngMock/service/$exceptionHandler ngMock/service/$httpBackend ngMock/service/$interval ngMock/service/$log ngMock/service/$timeout ngMock/type ngMock/type/angular.mock.TzDate ngMockE2E ngMockE2E/service ngMockE2E/service/$httpBackend ngResource ngResource/service ngResource/service/$resource ngRoute ngRoute/directive ngRoute/directive/ngView ngRoute/provider ngRoute/provider/$routeProvider ngRoute/service ngRoute/service/$route ngRoute/service/$routeParams ngSanitize ngSanitize/filter ngSanitize/filter/linky ngSanitize/service ngSanitize/service/$sanitize ngTouch ngTouch/directive ngTouch/directive/ngClick ngTouch/directive/ngSwipeLeft ngTouch/directive/ngSwipeRight ngTouch/service ngTouch/service/$swipe

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AngularJS: API: ng/directive/ngSwitch

ngSwitch

  1. - directive in module ng

ngSwitch指令用于根据域表达式在你的模板上按条件切换DOM结构。元素内使用ngSwitch而非ngSwitchWhen或ngSwitchDefault指令的地方会保留在模板中的位置。

这个指令的工作方法类似于ngInclude，然而，使用下载的模板代码替换(或从模板缓冲中载入)，ngSwitch只从嵌套元素中简单选择一个，并让根据将匹配表达式值的元素显示出来。换句话说，你定义一个包含元素 (在你放置指令的地方),放置一个表达式在 on="..." 属性 (或 ng-switch="..." 属性)上，然后在指令内定义任何内部元素，并放置when属性到每个元素上。when属性用于告诉ngSwitch当表达式计算时显示哪个元素。如果匹配的表达式没在when属性中找到，会显示default属性对应的元素。

注意用于匹配的属性值不能是表达式。他们被解释为字符串值进行匹配。例如，ng-switch-when="someVal" 将匹配字符串 "someVal" ，而不会对应为表达式$scope.someVal的值。

指令信息

  • 这个指令会创建新的作用域(scope)。
  • 这个指令执行优先级为800.

用法

<ANY ng-switch="expression">
  <ANY ng-switch-when="matchValue1">...</ANY>
  <ANY ng-switch-when="matchValue2">...</ANY>
  <ANY ng-switch-default>...</ANY>
</ANY>

动画

enter - 在ngSwitch的内容改变并匹配到内部子元素后发生。

leave - 只在ngSwitch内容改变后并在原内容从DOM移除前发生。

点击这里 了解更多关于涉及动画的步骤。

参数

参数 类型 详述
ngSwitch | on *

用于匹配 ng-switch-when的表达式。在子元素可添加：

  • ngSwitchWhen: 状况匹配语句。如果匹配到这个状况就显示。如果一次匹配到多个，那所有匹配到的元素都会显示。
  • ngSwitchDefault: 当没有状况匹配到时的默认状况。如果有多个默认状况，所有都会显示。

示例

index.html
<div ng-controller="ExampleController">
  <select ng-model="selection" ng-options="item for item in items">
  </select>
  <tt>selection={{selection}}</tt>
  <hr/>
  <div class="animate-switch-container"
    ng-switch on="selection">
      <div class="animate-switch" ng-switch-when="settings">Settings Div</div>
      <div class="animate-switch" ng-switch-when="home">Home Span</div>
      <div class="animate-switch" ng-switch-default>default</div>
  </div>
</div>
script.js
angular.module('switchExample', ['ngAnimate'])
  .controller('ExampleController', ['$scope', Function($scope) {
    $scope.items = ['settings', 'home', 'other'];
    $scope.selection = $scope.items[0];
  }]);
animations.css
.animate-switch-container {
  position:relative;
  background:white;
  border:1px solid black;
  height:40px;
  overflow:hidden;}

.animate-switch {
  padding:10px;}

.animate-switch.ng-animate {
  -webkit-transition:all cubic-bezier(0.250, 0.460, 0.450, 0.940) 0.5s;
  transition:all cubic-bezier(0.250, 0.460, 0.450, 0.940) 0.5s;

  position:absolute;
  top:0;
  left:0;
  right:0;
  bottom:0;}

.animate-switch.ng-leave.ng-leave-active,.animate-switch.ng-enter {
  top:-50px;}.animate-switch.ng-leave,.animate-switch.ng-enter.ng-enter-active {
  top:0;}
protractor.js
var switchElem = element(by.css('[ng-switch]'));
var select = element(by.model('selection'));

it('should start in settings', Function() {
  expect(switchElem.getText()).toMatch(/Settings Div/);});
it('should change to home', Function() {
  select.all(by.css('option')).get(1).click();
  expect(switchElem.getText()).toMatch(/Home Span/);});
it('should select default', Function() {
  select.all(by.css('option')).get(2).click();
  expect(switchElem.getText()).toMatch(/default/);});
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