AngularJS中实现显示或隐藏动画效果的方式总结

作者：bea

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>

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AngularJS中实现显示或隐藏动画效果的方式总结

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