移动端Ionic App 资讯上下循环滚动的实现代码(跑马灯效果)

angular.module('starter') 
  .directive('slideScroll', function ($window, $timeout) { 
    return { 
      restrict: 'AE', 
      link: function (scope, element, attr) { 
        var _scrollHeight = 40; 
        var _newsLen = 3; 
        var index = 0; 
        setInterval(function () { 
          index += 1; 
          if (index > _newsLen) { 
            index = 0; 
            $(".news-right ul").css({ 
              top: 0 
            }) 
          } else { 
            $(".news-right ul").animate({ 
              top: -_scrollHeight * index - 10 * index 
            }, 500); 
          } 
        }, 2000) 
      } 
    }; 
  }); 

<div class="news-right" ui-sref="newsList"> 
   <ul slide-scroll> 
      <li class="news-box" ng-repeat="row in dataArr"> 
        <p ng-repeat="item in row">{{item.title.length <= 19 ? item.title : item.title.slice(0, 19) + '...'}}</p> 
      </li> 
      <li> 
         <p ng-repeat="item1 in dataArr[0]">{{item1.title.length <= 19 ? item1.title : item1.title.slice(0, 19) + '...'}}</p> 
      </li> 
   </ul> 
</div> 

 .news-right { 
  position: absolute; 
  height: 40px; 
  left: 100px; 
  top: 10px; 
  right: 0; 
  color: rgb(65, 65, 65); 
  overflow: hidden; 
}  
.news-right ul{ 
  width: 100%; 
  position: absolute; 
  top: 0; 
  left: 0; 
} 
.news-right p { 
  padding: 0; 
  line-height: 15px; 
  text-overflow: ellipsis; 
  box-sizing: border-box; 
  white-space: nowrap; 
  font-size: 13px; 
}