AngularJS 是一组用于创建单页Web应用的丰富框架，给构建丰富交互地应用带来了所有需要的功能。其中一项主要的特性就是Angular带来了对动画的支持。
本篇体验在AngularJS中实现在"显示/隐藏"这2种状态切换间添加动画效果。
通过CSS方式实现显示/隐藏动画效果
思路：
→npm install angular-animage
→依赖：var app = angular.module("app",["ngAnimate"]);
→controller中一个变量接收bool值
→界面中提供一个按钮，点击改变bool值
→界面中显示/隐藏的区域提供ng-if和controller中的bool值绑定
app.js
var app = angular.module("app",["ngAnimate"]);app.controller("AppCtrl", function(){ this.toggle = true;})
index.html
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title></title> <link rel="stylesheet" href="../node_modules/bootstrap/dist/css/bootstrap.min.css"/> <link rel="stylesheet" href="styles.css"/></head><body ng-app="app" ng-controller="AppCtrl as app"><button class="btn" ng-click="app.toggle=!app.toggle">Toggle Animation</button><div class="toggle" ng-if="app.toggle">Some content here</div><script src="../node_modules/angular/angular.min.js"></script><script src="../node_modules/angular-animate/angular-animate.min.js"></script><script src="app.js"></script></body></html>
styes.css
.toggle{ -webkit-transition: linear 1s; -moz-transition: linear 1s; -ms-transition: linear 1s; -o-transition: linear 1s; transition: linear 1s;}.toggle.ng-enter{ opacity: 0;}.toggle.ng-enter-active{ opacity: 1;}.toggle.ng-leave{ opacity: 1;}.toggle.ng-leave-active{ opacity: 0;}
通过animation方法实现显示/隐藏动画效果
app.animation("某个类名", function(){ return { leave: function(element, done){ }, enter: function(element, done){ } }})
animation可以在某个类名上加上leave,enter事件，leave和enter函数内部如何实现动画效果呢？可以通过TweenMax.min.js实现。
app1.js
ar app = angular.module("app",["ngAnimate"]);app.controller("AppCtrl", function(){ this.toggle = true;})app.animation(".toggle", function(){ return { leave: function(element, done){ //element.text("nooooo"); TweenMax.to(element, 1, {opacity:0, onComplete:done}) }, enter: function(element, done){ TweenMax.from(element, 1, {opacity:0, onComplete:done}) } }})
index1.html
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title></title> <link rel="stylesheet" href="../node_modules/topcoat/css/topcoat-desktop-light.min.css"/></head><body class="well-lg" ng-app="app" ng-controller="AppCtrl as app"><button class="topcoat-button--large--cta" ng-click="app.toggle = !app.toggle">点我</button><hr/><div class="topcoat-notification toggle" ng-if="app.toggle">I'm too your to fade</div><script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/TweenMax.min.js"></script><script src="../node_modules/angular/angular.min.js"></script><script src="../node_modules/angular-animate/angular-animate.min.js"></script><script src="app1.js"></script></body></html>
其中，npm install topcoat是一个很好的样式库。
使用direcive的方式实现显示/隐藏动画效果
是否可以在显示/隐藏的div部分加上一个属性，比如hide-me="app.isHidden",hide-me这个属性监控app.isHidden,根据值的变化情况再来决定是否显示。
app3.js
var app=angular.module('app',["ngAnimate"]);app.controller("AppCtrl", function(){ this.isHidden = false; this.fadeIt = function(){ //TweenMax.to($("#my-badge"), 1, {opacity:0}) this.isHidden = !this.isHidden; }})app.directive("hideMe", function($animate){ return function(scope, element, attrs){ scope.$watch(attrs.hideMe, function(newVal){ if(newVal){ //TweenMax.to(element, 1, {opacity:0}); $animate.addClass(element, "fade"); } else{ $animate.removeClass(element, "fade"); } }) }})app.animation(".fade", function(){ return { addClass: function(element, className){ TweenMax.to(element, 1, {opacity:0}); }, removeClass: function(element, className){ TweenMax.to(element, 1, {opacity:1}); } }})
index3.html
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title></title> <link rel="stylesheet" href="../node_modules/bootstrap/dist/css/bootstrap.min.css"/></head><body ng-app="app" ng-controller="AppCtrl as app"><button id="my-button" class="btn-primary" ng-click="app.fadeIt()">Click to fade</button><div id="my-badge" class="badge" hide-me="app.isHidden">Fade me</div><script src="../node_modules/jquery/dist/jquery.min.js"></script><script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/TweenMax.min.js"></script><script src="../node_modules/angular/angular.min.js"></script><script src="../node_modules/angular-animate/angular-animate.min.js"></script><script src="app3.js"></script></body></html>
以上内容是小编给大家介绍的AngularJS中实现显示或隐藏动画效果的方式总结，希望大家喜欢。
