Angular.js实现多个checkbox只能选择一个的方法示例

<div class="form-group">
   <label class="col-sm-2 control-label">请选择文章主题色彩</label>
   <div class="col-sm-10" theme-group>
   <label class="i-switch m-t-xs m-r">
    <input type="checkbox" input-theme >
    <i></i>
   </label>
   <label class="i-switch bg-info m-t-xs m-r">
    <input type="checkbox" input-theme>
    <i></i>
   </label>
   <label class="i-switch bg-primary m-t-xs m-r">
    <input type="checkbox" input-theme >
    <i></i>
   </label>
   <label class="i-switch bg-danger m-t-xs m-r">
    <input type="checkbox" input-theme>
    <i></i>
   </label>
   </div>
</div>

(function () {
 angular
 .module("shishuoproject")
 .directive("themeGroup",function(){
  return{
  controller: function () {
   var scopeArray=[];
   this.addScope= function (scope) {
   var self=this;
   scopeArray.push(scope);
   scope.$on("$destory",function(){
    self.removeScope(scope);
   })
   };
   this.closeScope= function (scope) {
   //var l=scopeArray.length;
   angular.forEach(scopeArray, function (value) {
    if(value!=scope){
    value.flag=false;
    }
   })
   };
   this.removeScope= function (scope) {
   var index=scopeArray.indexOf(scope);
   if(index!==-1){
    scopeArray.splice(index,1);
   }
   };
   this.getIndex= function (scope) {
   var index=scopeArray.indexOf(scope);
   return index;
   }
  }
  }
 })
 .directive("inputTheme",function(){
  return{
  restrict:'EA',
  require:"^?themeGroup",
  template:'<input type="checkbox" ng-click="choseTheme()" ng-model="flag">',
  replace:true,
  scope:{},
  link: function (scope,element,attr,themeCon) {
   var colorArray=['#27c24c','#23b7e5','#7266ba',' #f05050'];
   themeCon.addScope(scope);
   scope.choseTheme= function () {
   themeCon.closeScope(scope);
   var index=themeCon.getIndex(scope);
   var color=colorArray[index];
   scope.$emit("getArticleThemeColor",{'color':color});
   console.log(scope.flag);
   };
  }
  }
 })
})()