<div ng-controller="myController1">
</div>

app.controller('myController1',['$scope',function($scope){
    $scope.load=function(){
     console.log('正在加载数据......');
    }
}]);
app.directive('myTest',function(){
    return{
      restrict:'E',
      link:function(scope,ele,attr){
        ele.bind('mouseenter',function(){
          scope.load();
        })
      }
    }
})

scope.load();

scope.$apply('load()');

<div ng-controller="myController1" loadMore="load1()"</div>
<div ng-controller="myController2" loadMore="load2()"></div>

app.controller('myController1',['$scope',function($scope){
    $scope.load1=function(){
     console.log('正在加载数据......');
    }
}]);
app.controller('myController2',['$scope',function($scope){
    $scope.load2=function(){
    console.log('正在加载数据........');
    }
}]);
app.directive('myTest',function(){
    return{
      restrict:'E',
      link:function(scope,ele,attr){
        ele.bind('mouseenter',function(){
          scope.$apply(attr.loadmore())
        })
      }
    }
})

scope.$apply(attr.loadmore());