Angularjs实现mvvm式的选项卡示例代码

在实现Angularjs实现mvvm式的选项卡之前，先搬出我们常用的jquery实现。

1、jquery实现简单粗暴的选项卡效果

var nav = $(".tabs");//tab切换
var box = $(".box");//容器
nav.on("click", function(){ //点击事件
 var this_index=$(this).index();
 $(this).addClass("active").siblings().removeClass("active");
 box.eq(this_index).show().siblings().hide();
});

</div>

在这里只给出js核心部分，html和css不做赘述。

以上代码，简单粗暴的实现了选项卡效果，用点击事件获得elem.index() , 把索引和容器串起来控制显示隐藏。

2、angularjs实现一个简单选项卡效果

Html部分

 <section ng-app="myApp">
  <div class="tabs tabs-style" ng-controller="TabController as tab">
   <nav>
   <ul>
    <li ng-class="{'current':tab.isSet(1)}">
    <a href="#" ng-click="tab.setCurrent(1)"><span>Home</span></a></li>
    <li ng-class="{'current':tab.isSet(2)}">
    <a href="#" ng-click="tab.setCurrent(2)"><span>Work</span></a></li>
    <li ng-class="{'current':tab.isSet(3)}">
    <a href="#" ng-click="tab.setCurrent(3)"><span>Blog</span></a></li>
    <li ng-class="{'current':tab.isSet(4)}">
    <a href="#" ng-click="tab.setCurrent(4)"><span>About</span></a></li>
    <li ng-class="{'current':tab.isSet(5)}">
    <a href="#" ng-click="tab.setCurrent(5)"><span>Contact</span></a></li>
   </ul>
   </nav>
   <div class="content">
   <section id="section-1" ng-show="tab.isSet(1)">
    <p>1</p>
   </section>
   <section id="section-2" ng-show="tab.isSet(2)">
    <p>2</p>
   </section>
   <section id="section-3" ng-show="tab.isSet(3)">
    <p>3</p>
   </section>
   <section id="section-4" ng-show="tab.isSet(4)">
    <p>4</p>
   </section>
   <section id="section-5" ng-show="tab.isSet(5)">
    <p>5</p>
   </section>
   </div>
  </div>
 </section>

</div>

css 部分（这里为了方便我们使用Less语法，童鞋们可以自定义css实现个性效果）

* {
 margin: 0;
 padding: 0;
}

body {
 background: #e7ecea;
 font-weight: 600;
 font-family: 'Raleway', Arial, sans-serif;
 text-align: center;
}

a {
 color: #2CC185;
 text-decoration: none;
 outline: none;

 &:hover {
 color: #74777b;
 }
}

.tabs {
 position: relative;
 width: 100%;
 margin: 30px auto 0 auto;

 nav {
 ul {
  position: relative;
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  list-style: none;
  flex-flow: row wrap;
  justify-content: center;

  li {
   flex: 1;

   &.current a {
   color: #74777b;
   }
  }
  }
 } 
 a {
  display: block;
  position: relative;
  overflow : hidden;
  line-height: 2.5;

  span {
  vertical-align: middle;
  font-size: 1.5em;
  }
 }
}

.content {
 position: relative; 

 section {
 /* display: none; */
 margin: 0 auto;
 max-width: 1200px;

 &.content-current {
  /* display: block; */
 }

 p {
  color: rgba(40,44,42, 0.4);
  margin: 0;
  padding: 1.75em 0;
  font-weight: 900;
  font-size: 5em;
  line-height: 1;
 }
 }
}

.tabs-style {
 nav {
 /* background: rgba(255,255,255,0.4); */

 ul li {
  a {
  overflow: visible; 
  border-bottom: 1px solid rgba(0,0,0,0.2);
  -webkit-transition: color 0.2s;
  transition: color 0.2s;
  }
 }

 ul li.current a{
  &:after, &:before {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  width: 0;
  height: 0;
  border: solid transparent;
  }
  &:after {
  margin-left: -10px;
  border-width: 10px;
  border-top-color: #e7ecea;
  }
  &:before {
  margin-left: -11px;
  border-width: 11px;
  border-top-color: rgba(0,0,0,0.2);
  }
 }
 }
}

</div>

js部分

angular.module('myApp', [])
 .controller('TabController', function() {
 this.current = 1;

 this.setCurrent = function (tab) {
 this.current = tab;
 };

 this.isSet = function(tab) {
 return this.current == tab;
 };
});

</div>

最后效果如下图所示：

通过以上代码，我们可以发现实现的核心是angularjs内置的ng-class和ng-click，ng-show指令。

通俗来讲：controller里定义了current 这条数据默认值为1，ng-click给点击事件自定义函数，改变current数据，ng-class通过获得current的值绑定条件，给当前选中的索引添加current样式，容器同样获得controller里的current数据通过ng-show控制显示隐藏。

3、angularjs实现一个稍微复杂的移动端选项卡效果

html部分

<script src="http://cdn.bootcss.com/angular.js/1.3.8/angular.min.js"></script>
<script src="http://cdn.bootcss.com/angular.js/1.3.8/angular-touch.min.js"></script>
//angularjs的一个移动端touch事件库

<div ng-app='myApp' ng-controller="myController">
 <div class="type-tabs">
  <div ng-repeat="item in [1,2,3,4]" ng-click="changeIndex($index)">Tab{{item}}</div>
 </div>
 <div class="guid-bar">
  <div class="guid-bar-content" style="left:{{ 25*activeIndex}}%"></div>
 </div>
 <div class="tab-content" ng-swipe-right="swipeRight()" ng-swipe-left="swipeLeft()">
  <div class="tab-content-inner" style="left:{{ -100*activeIndex}}%">
  <div class="tab-content-item" ng-repeat="item in [1,2,3,4]" >
   <br /><br /><br /><br />
   <h1>Tab{{item}}
   </h1></div>
  </div>
 </div>
</div>

</div>

css部分

*{
 padding:0;
 margin:0;
 font-family:'Arial';
}
.type-tabs{
 width: 100%;
 height: 40px;
}
.type-tabs div{
 float: left;
 width: 25%;
 line-height: 40px;
 text-align: center;
 cursor:pointer;
 user-select:none; 
 -webkit-user-select:none;

}
.guid-bar{
 position: relative;
 margin-top: -3px;
}
.guid-bar-content{
 width: 25%;
 height: 3px;
 background-color: #345;
 position: absolute;
 left: 50%;
 transition:all 400ms ease;
}
.tab-content{
 width: 100%;
 height: 500px;
 background-color: #ccc;
 overflow: hidden;
}
.tab-content-inner{
 width: 400%;
 position: relative;
 transition: all 400ms;
}
.tab-content-item{
 width: 25%;
 float: left;
 text-align:center;
}

</div>

js部分

var myApp=angular.module('myApp',['ngTouch']);
myApp.controller('myController',function($scope){
 $scope.activeIndex=0;
 $scope.changeIndex=function(index){
  $scope.activeIndex=index;
 };
 $scope.swipeLeft=function(){
  $scope.activeIndex=++$scope.activeIndex;
  $scope.check();
 };
 $scope.swipeRight=function(){
  $scope.activeIndex=--$scope.activeIndex;
  $scope.check();
 };
 $scope.check=function(){
  if($scope.activeIndex>3)
  $scope.activeIndex=0;
  if($scope.activeIndex<0)
  $scope.activeIndex=3;
 }
})

</div>

效果如下：