半秒后使用 AngularJS 在鼠标悬停时显示子菜单
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【中文标题】半秒后使用 AngularJS 在鼠标悬停时显示子菜单【英文标题】：Show submenu on mouseover using AngularJS after half a second 【发布时间】：2018-01-16 06:59:54 【问题描述】：我正在尝试使用 AngularJS 创建一个导航栏。 我需要分别在“div.menu-links”上的 mouseover 和 mouseleave 上显示和隐藏子菜单“div.farm-links”。
我应该将“菜单链接”上的鼠标悬停延迟 0.5 秒，类似地，在 mouseleave 上，效果应该在 0.5 秒后发生。但不知何故，这似乎不起作用。
你能帮我纠正一下吗？ 另外，是否可以仅使用 CSS 来实现？
angular.module('topNavApp', ['ngAnimate']).controller('navCtrl', ['$scope', '$timeout', function($scope, $timeout)
$scope.pageData =
"allChildList":[
"pageExist":true,
"pageTitle":"About Abc",
"pagePath":"http://www.yahoo.com",
"openNewTab":true,
"hideInTabletNav":true,
"hideInMobileNav":true,
"secondLevelChildList":[
"pageExist":true,
"pageTitle":"News",
"pagePath":"/content/myloc/about-Abc/news.html",
"openNewTab":false,
"thirdLevelChildList":[
],
"multiple":true,
"thirdLevelPageExist":true
,
"pageExist":true,
"pageTitle":"Company",
"pagePath":"/content/myloc/about-Abc/company.html",
"openNewTab":false,
"thirdLevelChildList":[
"pageExist":true,
"pageTitle":"Strategy",
"pagePath":"/content/myloc/about-Abc/company/strategy.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Mission Vision Values",
"pagePath":"/content/myloc/about-Abc/company/missionvisionvalues.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Leadership",
"pagePath":"/content/myloc/about-Abc/company/leadership.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Org Chart",
"pagePath":"http://mysite/pages/OrgChart.aspx",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Corporate Responsibility",
"pagePath":"http://myloc2/who/global-impact",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"History",
"pagePath":"https://usa.Abc.com/about-Abc/our_business/history-of-Abc.html",
"openNewTab":true
,
"pageExist":true,
"pageTitle":"Products",
"pagePath":"http://myloc2/who/products",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Investor Info",
"pagePath":"http://investor.Abc.com/",
"openNewTab":true
,
"pageExist":true,
"pageTitle":"View All",
"pagePath":"/content/myloc/about-Abc/company/view-more.html",
"openNewTab":false
],
"multiple":true,
"thirdLevelPageExist":true
,
"pageExist":true,
"pageTitle":"Community",
"pagePath":"/content/myloc/about-Abc/community.html",
"openNewTab":false,
"thirdLevelChildList":[
"pageExist":true,
"pageTitle":"Diversity + Inclusion",
"pagePath":"/content/myloc/about-Abc/community/diversity-and-inclusion.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Giving Back",
"pagePath":"http://myloc2/working/giving-back/Pages/default.aspx",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Ideas Community",
"pagePath":"/content/myloc/about-Abc/initiatives/ideas.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Other Communities",
"pagePath":"http://myloc2/working/get-involved/Pages/default.aspx",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"View All",
"pagePath":"/content/myloc/about-Abc/community/view-all-community.html",
"openNewTab":false,
"hideInDesktopNav":true
,
"pageExist":true,
"pageTitle":"myloc Transformation",
"pagePath":"/content/myloc/about-Abc/community/transformation.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Calendar",
"pagePath":"/content/myloc/about-Abc/community/Calendar.html",
"openNewTab":false
],
"multiple":true,
"thirdLevelPageExist":true
,
],
"columnClass":"0",
"multiple":true,
"secondLevelPageExist":true
,
"pageExist":true,
"pageTitle":"Offices",
"pagePath":"http://www.yahoo.com",
"openNewTab":true,
"hideInDesktopNav":true,
"hideInTabletNav":true,
"hideInMobileNav":true,
"secondLevelChildList":[
"pageExist":true,
"pageTitle":"Locations",
"pagePath":"/content/myloc/offices/locations.html",
"openNewTab":false,
"thirdLevelChildList":[
"pageExist":true,
"pageTitle":"Ashburn",
"pagePath":"/content/myloc/offices/locations/ashburn.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Austin",
"pagePath":"/content/myloc/offices/locations/austin.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Bangalore",
"pagePath":"/content/myloc/offices/locations/bangalore.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Denver",
"pagePath":"/content/myloc/offices/locations/denver.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Dubai",
"pagePath":"/content/myloc/offices/locations/dubai.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Foster City",
"pagePath":"/content/myloc/offices/locations/foster-city.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"San Francisco",
"pagePath":"/content/myloc/offices/locations/san-francisco.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Miami",
"pagePath":"/content/myloc/offices/locations/miami.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Singapore - Singpost",
"pagePath":"/content/myloc/offices/locations/singapore-singpost.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Singapore - Robinson Road",
"pagePath":"/content/myloc/offices/locations/singapore-robinson-road.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"View All",
"pagePath":"http://myloc.trusted.Abc.com/content/myloc/offices/locations.html",
"openNewTab":true
],
"multiple":true,
"thirdLevelPageExist":true
,
"pageExist":true,
"pageTitle":"Quick Links",
"pagePath":"/content/myloc/offices/quick-links.html",
"openNewTab":true,
"hideInDesktopNav":true,
"hideInMobileNav":true,
"thirdLevelChildList":[
"pageExist":true,
"pageTitle":"Copy Centers",
"pagePath":"/content/myloc/offices/quick-links/copy-centers.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Floor Maps",
"pagePath":"/content/myloc/offices/quick-links/floor-maps.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"Food Services",
"pagePath":"/content/myloc/offices/quick-links/food-services.html",
"openNewTab":false
,
"pageExist":true,
"pageTitle":"View All",
"pagePath":"/content/myloc/offices/quick-links/view-all.html",
"openNewTab":false
],
"multiple":true,
"thirdLevelPageExist":true
,
"pageExist":true,
"pageTitle":"Facilities Help",
"pagePath":"/content/myloc/offices/facilities-help.html",
"openNewTab":false,
"thirdLevelChildList":[
"pageExist":true,
"pageTitle":"Submit Request",
"pagePath":"http://servicerequest",
"openNewTab":true
,
"pageExist":true,
"pageTitle":"View All",
"pagePath":"/content/myloc/offices/facilities-help/view-all-facilities-help.html",
"openNewTab":false,
"hideInDesktopNav":true
],
"multiple":true,
"thirdLevelPageExist":true
,
"pageExist":true,
"pageTitle":"View All",
"pagePath":"/content/myloc/offices/view-all-offices.html",
"openNewTab":false,
"hideInDesktopNav":true,
"thirdLevelChildList":[
],
"thirdLevelPageExist":false
],
"columnClass":"3",
"multiple":true,
"secondLevelPageExist":true
,
"pageExist":true,
"pageTitle":"Functions",
"pagePath":"https://www.google.com",
"openNewTab":true,
"hideInDesktopNav":true,
"hideInTabletNav":true,
"hideInMobileNav":true,
"secondLevelChildList":[
],
"columnClass":"1",
"multiple":true,
"secondLevelPageExist":true
,
"pageExist":true,
"pageTitle":"My HR",
"pagePath":"/content/myloc/my-hr.html",
"openNewTab":false,
"secondLevelChildList":[
],
"columnClass":"1",
"multiple":true,
"secondLevelPageExist":true
,
"pageExist":true,
"pageTitle":"Tools",
"pagePath":"/content/myloc/tools.html",
"openNewTab":true,
"secondLevelChildList":[
],
"columnClass":"1",
"multiple":true,
"secondLevelPageExist":true
]
;
$scope.showDiv = function()
$timeout(function()
this.hovering = true;
, 500);
;
$scope.hideDiv = function()
$timeout(function()
this.hovering = false;
, 500);
;
]);.hiding-div
display: inline-block;
padding: 10px;
margin: 10px;
.menu-link
text-decoration: none;
.menu-link:hover
color: #AB09AF;
.farm-links
position: absolute;
top: 50px;
height: 400px;
width: 700px;
border: 1px solid lightgrey;
padding: 5px;
display: flex;
word-wrap: flex;
column-count: 4;
.groups-links
display: inline-block;
margin-right: 60px;
.group-title
color: grey;
text-decoration: none;
.group-links
list-style: none;
.second-link
margin-left: -40px;
.second-link > a
text-decoration: none;
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<nav ng-app="topNavApp" ng-controller="navCtrl" class="nav">
<div class="nav-center">
<!--<li ng-repeat="obj in pageData.allChildList" ng-model="parentNav" ng-mouseover="parentNav=true" ng-mouseleave="parentNav=false"> -->
<div ng-repeat="obj in pageData.allChildList" class="hiding-div" ng-mouseover="showDiv()" ng-mouseleave="hideDiv()" >
<div>
<a ng-href="obj.pagePath" class="main-link multiple menu-link">obj.pageTitle</a>
<!--<span class="main-link mobile" aria-labelledby="obj.pageTitle" aria-expanded="false">obj.pageTitle</span>-->
<!--<span ng-repeat="child in obj.secondLevelVoList" class="childNav" ng-show="parentNav">-->
<div class="farm-links" ng-show="hovering">
<!--<a class="prev-link" aria-labelledby="obj.pagetitle">obj.pageTitle</a>-->
<div ng-repeat="child in obj.secondLevelChildList" class="groups-links">
<a ng-href="child.pagePath" class="group-title">child.pageTitle</a>
<!--<span class="group-title mobile" aria-expanded="false">child.pageTitle</span>-->
<ul ng-repeat="subchild in child.thirdLevelChildList" class="group-links">
<li class="second-link">
<a ng-href="subchild.pagePath">subchild.pageTitle</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</nav>【问题讨论】：
我不知道为什么会出现脚本错误。虽然是同一个文件，但在我的本地设置中运行得非常好！ docs.angularjs.org/api/ngAnimate -> CSS 交错动画？ 【参考方案1】：您必须在$scope 上定义悬停。您可以使用数组来显示ng-repeat上的相应行
JS：
$scope.hovering=[];
$scope.showDiv = function(index)
$timeout(function()
$scope.hovering[index] = true;
, 500);
;
$scope.hideDiv = function(index)
$timeout(function()
$scope.hovering[index] = false;
, 500);
;
HTML：
<div ng-repeat="obj in pageData.allChildList" class="hiding-div" ng-mouseover="showDiv($index)" ng-mouseleave="hideDiv($index)" >
<div>
【讨论】：
【参考方案2】：不可能通过纯 CSS 来实现。问题出在您的 this.hovering 变量中，在您的情况下，它应该是 $scope.hovering。
$scope.showDiv = function()
$timeout(function()
$scope.hovering = true;
, 500);
;
$scope.hideDiv = function()
$timeout(function()
$scope.hovering = false;
, 500);
;
更新
'$scope.hovering' 显示所有子菜单，而不是只显示相应的子菜单。我们如何解决这个问题？
只需更新以下行：
HTML：
<div ng-repeat="obj in pageData.allChildList" class="hiding-div" ng-mouseover="showDiv(obj)" ng-mouseleave="hideDiv(obj)">
...
<div class="farm-links" ng-show="obj.hovering">
控制器：
$scope.showDiv = function(obj)
$timeout(function()
obj.hovering = true;
, 500);
;
$scope.hideDiv = function(obj)
$timeout(function()
obj.hovering = false;
, 500);
;
这里我们将当前的obj 从ng-repeat 传递给$scope.showDiv 和$scope.showDiv 函数，然后我们设置一个新的对象属性，如下所示：obj.hovering = true; 或obj.hovering = false;。在这里ng-show="obj.hovering"，我们根据新的obj.hovering 属性值显示/隐藏此元素。
【讨论】：
'$scope.hovering' 显示所有子菜单，而不是只显示相应的子菜单。我们如何解决这个问题？ 它似乎也不起作用！抛出错误“未定义 obj”。 对不起，我的错。它工作正常！我在一个地方错过了 obj！ @Sunny，很高兴听到，它可以帮助你！如果它真的有用，任何赞成票都会很棒=） 非常感谢！我还问了另一个问题。你介意调查一下吗？ ***.com/questions/45574360/…以上是关于半秒后使用 AngularJS 在鼠标悬停时显示子菜单的主要内容，如果未能解决你的问题，请参考以下文章