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制作炫酷的专题页面

    很多时候,我们需要一些炫酷的动画效果,让页面更加吸引用户的眼球,现有比较好用的JS动画库有:velocity和GSAP(支持falsh和js)。今天这里主要学习的是velocity配合css3动画,快速打造属于你的专题页面。
    PS:发现各种炫酷的效果都是由这些简单的动作通过组合实现的,发现最终效果和动画的设计者有很大关系,鄙人就属于那种不怎么懂设计的人,这里只是抛砖引玉。
 
    虽然我今天不准备详细介绍GSAP这个动画库,但是还有有必要把相关资源的入口放在这里,供想要了解的 同学进行深入的 学习。
  • 特性介绍:http://www.infoq.com/cn/news/2012/05/gsap-v12
  • 官网:http://www.greensock.com/gsap-js/
    最好的学习就是查看官方API文档,其次结合场景才会出现的问题,可以交流一下应该就可以解决。
 
    废话不多说了,进入今天的正题。
 
    基础技能
 
    velocity功能    
    包含$.animate()所有功能,并且包含切换、转换、循环、缓动、CSS切换、scroll功能,从效率角度来说,比CSS更高。
    
    兼容性
    支持IE8+,chrome、firefox、android、ios(可以配置mobileMA,提升手机访问效果)
 
    默认配置
    可以使用$.Velocity.defaults进行查看管理。
 
    注:关于配置的使用说明,可以参考官方文档说明。其中begin、complete监听动画状态
   
    调用方式
    支持两种书写方式
  • 第一种:
   
 /**  * @param {Object|String} 需要改变css属性最终状态值或者是注册动画  * @param {Object} 动画基本配置,可以查看默认配置  */$element.velocity(properties, options) 

  

    
  • 第二种
    
/** * @param {Object} 操作元素,可以是原生对象,也可以是包装对象  * @param {Object|String} 需要改变css属性最终状态值或者是注册动画 * @param {Object} 动画基本配置,可以查看默认配置 */$.Velocity($element, properties, options);

  

 
    另:所有的属性值都可以是函数,返回最终的值
 
    提升技能
    
    自定义动画效果
    velocity提供了注册自定义动画的方法,方便使用者自定义,并进行方便多次使用
    
$.Velocity.RegisterEffect(name, {	defaultDuration: duration,	calls: [ 		[ { property: value }, durationPercentage, { options } ],		[ { property: value }, durationPercentage, { options } ]	],	reset: { property: value, property: value }});

  

    来一个简单的例子:
   
 $.Velocity.RegisterEffect("callout.pulse", {	defaultDuration: 900,	calls: [		[ { scaleX: 1.1 }, 0.50 ],		[ { scaleX: 1 }, 0.50 ]	]});

  

    注册一个callout.pulse方法,如何进行使用呢?可以参照基础技能中的调用方式,这里使用其中一种方式
    $elements.velocity(‘callout.pulse‘); //相当于是properties参数值
 
    UI pack--动画包
    官方提供一些动画包,可以直接进行使用,也可以通过自定义注册动画,然后进行使用。
    现有的的动画效果有:
    
callout.bounce,callout.shake,callout.flash,callout.pulse,callout.swing,callout.tada,transition.fadeIn,transition.fadeOut,transition.flipXIn,transition.flipXOut,transition.flipYIn,transition.flipYOut,transition.flipBounceXIn,transition.flipBounceXOut,transition.flipBounceYIn,transition.flipBounceYOut,transition.swoopIn,transition.swoopOut,transition.whirlIn,transition.whirlOut,transition.shrinkIn,transition.shrinkOut,transition.expandIn,transition.expandOut,transition.bounceIn,transition.bounceOut,transition.bounceUpIn,transition.bounceUpOut,transition.bounceDownIn,transition.bounceDownOut,transition.bounceLeftIn,transition.bounceLeftOut,transition.bounceRightIn,transition.bounceRightOut,transition.slideUpIn,transition.slideUpOut,transition.slideDownIn,transition.slideDownOut,transition.slideLeftIn,transition.slideLeftOut,transition.slideRightIn,transition.slideRightOut,transition.slideUpBigIn,transition.slideUpBigOut,transition.slideDownBigIn,transition.slideDownBigOut,transition.slideLeftBigIn,transition.slideLeftBigOut,transition.slideRightBigIn,transition.slideRightBigOut,transition.perspectiveUpIn,transition.perspectiveUpOut,transition.perspectiveDownIn,transition.perspectiveDownOut,transition.perspectiveLeftIn,transition.perspectiveLeftOut,transition.perspectiveRightIn,transition.perspectiveRightOut

  

    具体效果可以查看最下面的例子。
 
    自定义动画队列
    官方提供了执行动画队列的方法,$.Velocity.RunSequence(animationArr);其中animationArr是动画数组,数组的每个元素是一个元素动画效果,具体例子如下:
    
var mySequence = [	 { elements: $element1, properties: { translateX: 100 }, options: { duration: 1000 } },	 { elements: $element2, properties: { translateX: 200 }, options: { duration: 1000, sequenceQueue: false },	 { elements: $element3, properties: { translateX: 300 }, options: { duration: 1000?}];$.Velocity.RunSequence(mySequence);//默认队列动画是按照顺序执行的,可以通过设置sequenceQueue改变当前元素执行时机。默认是true,当为true时,指的是按照顺序执行,如果设置成false指的是,可以和上一个元素动画同时执行

  

    
    支持promise
    引入官方推荐的bluebird和when,即可采用如下使用方式:
   
 $element.velocity(properties, options).then(); //需要注意是的是无线循环和队列不支持该形式

  

 
   终极技能
 
    配合css3动画,达到最佳效果
 
 
    友情提示:
    velocity在进场和出场动画方面优势比较大,css3在循环动画上优势比较大。当然万恶的IE兼容问题    
 
    基于上面所讲到的,实现了一个基于jquery、velocity、animation.css实现的动画,仅供参考
    
/** * 动画处理 * author: 黑MAO */$(function() {	‘use strict‘;		/****内部方法开始****/	/**	 * css动画执行函数	 * @param {Object} 目标元素	 * @param {String} 初始class	 * @param {String} 动画类型	 * @param {Number} 动画时长	 * @param {Number} 动画延迟	 * @param {Number} 循环次数	 */	var timer;	function _cssRun(targetEl, className, animation, duration, delay, loop) {		duration = duration*1 || 1000;		delay = delay*1 || 0;		loop = (loop || loop == 0) ? loop*1 : 1;				if(loop < 1) {			loop = ‘infinite‘;		}		$(targetEl).removeClass();		$(targetEl).addClass(className).addClass(animation);		$(targetEl).css({			‘animation-duration‘: duration+‘ms‘,			‘animation-delay‘: delay+‘ms‘,			‘animation-iteration-count‘: loop+‘‘		});		if(loop != ‘infinite‘) {			clearTimeout(timer);			timer = setTimeout(function() {				$(targetEl).removeClass(animation);			}, duration*loop + delay);		}			}	/**	 * 监听select变化方法	 * @param {Object} 目标元素	 * @param {Object} 操作元素集合	 * @param {String} 初始class	 * @param {String} 动画类型 ["css", "js"]	 */	function _changeFunc(targetEl, opElementObj, className, animationType) {		var animation = $(opElementObj.animationEl).val();		var duration = $(opElementObj.durationEl).val();		var delay = $(opElementObj.delayEl).val();		var loop = $(opElementObj.loopEl).val();		if(animationType == "css") {			_cssRun(targetEl, className, animation, duration, delay, loop);		}else {			var ras = new Ras();			if(animation) {				ras.run(targetEl, ‘stop‘);				ras.run(targetEl, animation, {duration: duration, delay: delay, stagger: 200, drag: true});			}		}	}	/**	 * 初始化动画	 * @param {Array} 动画数组 	 * @param {Object} 操作元素对象	 * @param {Object} 目标元素	 * @param {Number} 动画延迟	 * @param {String} 需要显示的动画类型 ["show", "hide", "normal", "all"]	 * @param {String} 动画类型 ["css", "js"]	 */	function _initAnimation(animationArr, opElementObj, targetEl, type, animationType) {		var conf = opElementObj;		var className = $(targetEl).attr("class");				$(conf.animationEl).prepend(‘<option value="" diabled="disabled">选择动画类型</option>‘);		$(animationArr).each(function(key, val) {			var isShow = false;			switch(type) {				case "show":					if(val.indexOf(‘In‘) > 0) {						isShow = true;					}					break;				case "hide":					if(val.indexOf(‘Out‘) > 0) {						isShow = true;					}					break;				case "normal":					if(val.indexOf(‘Out‘) == -1 && val.indexOf(‘In‘) == -1) {						isShow = true;					}					break;				default:					isShow = true;					break;			}			isShow && $(conf.animationEl).append(‘<option value="http://www.mamicode.com/‘+val+‘">‘+val+‘</option>‘);		});		$(conf.animationEl).on(‘change‘, function() {			_changeFunc(targetEl, conf, className, animationType);		});		$(conf.durationEl).on(‘change‘, function() {			_changeFunc(targetEl, conf, className, animationType);		});		$(conf.delayEl).on(‘change‘, function() {			_changeFunc(targetEl, conf, className, animationType);		});		$(conf.loopEl).on(‘change‘, function() {			_changeFunc(targetEl, conf, className, animationType);		});	}		/****内部方法结束****/	function Ras(opts) {		var conf = {			beforeIndex : 0, //上一页序列号			currentIndex : 0, //当前页序列号			playing : true, //是否在运行			downward : true, //是否向下滚动			imgList: [], //页面内图片列表			quenes: { 				show: [], //页面显示列表				hide: [] //页面隐藏列表			},			navFunc: null, //导航回调函数			cssAnimationExtra: [], //css动画扩展			jsAnimationExtra: [] //js动画扩展		};				this.conf = $.extend(conf, opts);	}	//对外暴漏	window.Ras = Ras;		$.extend(Ras.prototype, {		init: function() {			var self = this;			var conf = this.conf;			//绑定键盘和鼠标事件			var quenes = conf.quenes;			var showList = conf.quenes.show;			var hideList = conf.quenes.hide;			var senceNum = showList.length;			$(document).on(‘mousewheel keyup‘,function(e){				if( !conf.playing ){					conf.playing = true;					if( e.keyCode && (e.keyCode==39||e.keyCode==40)){						conf.downward = true;					}					if( e.keyCode && (e.keyCode==37||e.keyCode==38) ){						conf.downward = false;					}					if( e.deltaY){						conf.downward = e.deltaY<0?true:false;					}					if( e.keyCode == 37 || e.keyCode == 38 || e.keyCode == 39 || e.keyCode == 40 || e.deltaY ){						conf.beforeIndex = conf.currentIndex;						conf.currentIndex = conf.downward ?conf.currentIndex + 1:conf.currentIndex - 1;						conf.currentIndex = conf.currentIndex>=senceNum?0:conf.currentIndex;						conf.currentIndex = conf.currentIndex<0?senceNum-1:conf.currentIndex;						conf.navFunc && conf.navFunc(conf.currentIndex);						self.show(hideList[conf.beforeIndex], showList[conf.currentIndex], function() {							conf.playing = false;						});					}				}				return false;			});						//处理图片预加载			var imgList = conf.imgList;			imgList.length && self.imgLoader(imgList);						//默认显示第一屏			self.show(null, showList[0], function() {				conf.playing = false;			});		},		/**		 * 初始化CSS动画		 * @param {Object} 联动元素集合		 * @param {Object} 目标元素		 * @param {String} 选项类型 ["show", "hide", "normal", "all"]		 */		initCssAnimation: function(opElementObj, targetEl, type) {			var conf = this.conf;			var animationStr = ‘bounce,pulse,rubberBand,shake,swing,tada,bounceIn,bounceInDown,bounceInLeft,bounceInRight,bounceInUp,bounceOut,bounceOutDown,bounceOutLeft,bounceOutRight,bounceOutUp,fadeIn,fadeInDown,fadeInDownBig,fadeInLeft,fadeInLeftBig,fadeInRight,fadeInRightBig,fadeInUp,fadeInUpBig,fadeOut,fadeOutDown,fadeOutDownBig,fadeOutLeft,fadeOutLeftBig,fadeOutRight,fadeOutRightBig,fadeOutUp,fadeOutUpBig,flip,flipInX,flipInY,flipOutX,flipOutY,lightSpeedOut,rotateIn,rotateInDownLeft,rotateInDownRight,rotateInUpLeft,rotateInUpRight,rotateOut,rotateOutDownLeft,rotateOutDownRight,rotateOutUpLeft,rotateOutUpRight,hinge,rollIn,rollOut,zoomIn,zoomInDown,zoomInLeft,zoomInRight,zoomInUp,zoomOut,zoomOutDown,zoomOutLeft,zoomOutRight,zoomOutUp,slideInDown,slideInLeft,slideInRight,slideInUp,slideOutDown,slideOutLeft,slideOutRight,slideOutUp,magic,openDownLeft,openDownRight,openUpLeft,openUpRight,openDownLeftRetourn,openDownRightRetourn,openUpLeftRetourn,openUpRightRetourn,openDownLeftOut,openDownRightOut,openUpLeftOut,openUpRightOut,perspectiveDown,perspectiveLeft,perspectiveRight,perspectiveUp,perspectiveDownRetourn,perspectiveLeftRetourn,perspectiveRightRetourn,perspectiveUpRetourn,puffIn,puffOut,rotateDown,rotateLeft,rotateRight,rotateUp,slideDown,slideLeft,slideRight,slideUp,slideDownRetourn,slideLeftRetourn,slideRightRetourn,slideUpRetourn,swap,twisterInDown,twisterInUp,vanishIn,vanishOut,swashOut,swashIn,foolishOut,holeOut,tinRightOut,tinLeftOut,tinUpOut,tinDownOut,tinRightIn,tinUpIn,tinDownIn,bombRightOut,bombLeftOut,boingInUp,boingOutDown,spaceOutUp,spaceOutRight,spaceOutLeft,spaceInUp,spaceInRight,spaceInDown,spaceInLeft,boomIn,circleRotate‘;			var animationArr = animationStr.split(‘,‘);			var arr = [];			$.merge(arr, animationArr, conf.cssAnimationExtra);			arr = $.unique(arr);			_initAnimation(arr, opElementObj, targetEl, type, ‘css‘);		},		/**		 * 初始化JS动画		 * @param {Object} 联动元素集合		 * @param {Object} 目标元素		 * @param {String} 选项类型 ["show", "hide", "normal", "all"]		 */		initJsAnimation: function(opElementObj, targetEl, type) {			var conf = this.conf;			var animationStr = ‘callout.bounce,callout.shake,callout.flash,callout.pulse,callout.swing,callout.tada,transition.fadeIn,transition.fadeOut,transition.flipXIn,transition.flipXOut,transition.flipYIn,transition.flipYOut,transition.flipBounceXIn,transition.flipBounceXOut,transition.flipBounceYIn,transition.flipBounceYOut,transition.swoopIn,transition.swoopOut,transition.whirlIn,transition.whirlOut,transition.shrinkIn,transition.shrinkOut,transition.expandIn,transition.expandOut,transition.bounceIn,transition.bounceOut,transition.bounceUpIn,transition.bounceUpOut,transition.bounceDownIn,transition.bounceDownOut,transition.bounceLeftIn,transition.bounceLeftOut,transition.bounceRightIn,transition.bounceRightOut,transition.slideUpIn,transition.slideUpOut,transition.slideDownIn,transition.slideDownOut,transition.slideLeftIn,transition.slideLeftOut,transition.slideRightIn,transition.slideRightOut,transition.slideUpBigIn,transition.slideUpBigOut,transition.slideDownBigIn,transition.slideDownBigOut,transition.slideLeftBigIn,transition.slideLeftBigOut,transition.slideRightBigIn,transition.slideRightBigOut,transition.perspectiveUpIn,transition.perspectiveUpOut,transition.perspectiveDownIn,transition.perspectiveDownOut,transition.perspectiveLeftIn,transition.perspectiveLeftOut,transition.perspectiveRightIn,transition.perspectiveRightOut‘;			var animationArr = animationStr.split(‘,‘);			var arr = [];			$.merge(arr, animationArr, conf.cssAnimationExtra);			arr = $.unique(arr);			_initAnimation(arr, opElementObj, targetEl, type, ‘js‘);		},		/**		 * 入场动画		 * @param {Array} 出场队列		 * @param {Array} 入场队列		 * @param {Function} 入场完成回调		 */		show: function(beforeQuene, currentQuene, callback) {			var self = this;			self.hide(beforeQuene);			currentQuene && self.run(currentQuene).then(function() {				callback && callback();			});		},		/**		 * 出场动画		 * @param {Array} 出场队列		 * @param {Function} 出场完成回调		 */		hide: function(quene, callback) {			var self = this;			callback && callback();			quene && self.run(quene);		},		/**		 * 图片懒加载		 * @param {Array} 图片列表		 * @param {Function} 图片加载回调		 */		imgLoader: function(imgList, callback) {			var count = imgList.length,                i = 0,                success = 0,                failed = 0,                failList = [];			for ( ; i < count ; i++ ) {				var img = new Image();				(function(i){					img.onload = function () {						success++;						if( (success + failed) == count ) {							callback&&callback.call( imgList , failed, failList);						}					};					img.onerror = function () {						failed++;						failList.push(imgList[i]);						if( (success + failed) == count ) {							callback&&callback.call( imgList , failed, failList );						}					};					img.src = http://www.mamicode.com/imgList[i];>

  

    使用方式:
    
var ras = new Ras({	cssAnimationExtra: [‘bounce‘],	jsAnimationExtra: [‘callout.bounce‘]});ras.init();//调用相关方法

  

  测试效果地址

 
    附录(资源地址):
 
    <link rel="stylesheet"  href="http://s1.qhimg.com/!efd6dff2/animation.css">
    <script src="http://s0.qhimg.com/lib/jquery/191.js" ></script> 

    <script src="http://s3.qhimg.com/!44713922/bluebird.js" ></script>
    <script src="http://s6.qhimg.com/!7c8590ec/jquery.mousewheel.min.js"></script>
    <script src="http://s3.qhimg.com/!20821230/velocity.min.js"></script>
    <script src="http://s5.qhimg.com/!d0b08d4d/velocity.ui.min.js"></script>

 
    参考资料:
    http://julian.com/research/velocity/
    https://github.com/julianshapiro/velocity
    http://www.infoq.com/cn/news/2014/05/jquery-velocity-js
 

制作炫酷的专题页面