AngularJS中实现显示或隐藏动画效果的3种方式
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>