Angular.JS通过指令操作DOM的方法

webApp.directive("detailTopStick", ["$timeout", "$window", function ($timeout, $window) {
 return {
 restrict: "A",
 link: function (scope) {
 $timeout(function () {
 var navbar = $(".navbar-nav"); 
 var navbarOffsetTop = navbar.offset().top;
 var headerInfo = $(".header-info");
 var headerInfoMarginBottom = parseInt(headerInfo.css("margin-bottom"));
 var navbarHeight = parseInt(navbar.css("height"));
 
 angular.element($window).bind("resize", function () { // 窗口绑定resize事件
  navbar.css("width", headerInfo.width());
  navbarOffsetTop = navbar.offset().top;
  scope.$apply();
 });
 
 angular.element($window).bind("scroll", function () {
  if ($window.scrollY > navbarOffsetTop) {
  navbar.css("width", headerInfo.width());
  navbar.addClass("detail-navbar-fix");
  headerInfo.css("margin-bottom", headerInfoMarginBottom + navbarHeight);
  }
  else {
  navbar.removeClass("detail-navbar-fix");
  headerInfo.css("margin-bottom", headerInfoMarginBottom);
  }
  scope.$apply();
 });
 
 navbar.on("click", function () {
  if ($window.scrollY > navbarOffsetTop) {
  $window.scrollTo(0, navbarOffsetTop);
  }
 });
 });
 }
 };
}]);