本篇文章给大家带来的内容是关于js实现图片轮播的代码实例(详细代码),有一定的参考价值,有需要的朋友可以参考一下,希望对你有所帮助。
broadcast.js
var CarouselFigure = new Object(); //轮播图初始化定义函数 CarouselFigure.init = function(tmpobj){ //定义动画帧数(默认为:30) this.frameNum = tmpobj.frameNum !=undefined ? tmpobj.frameNum : 30; //定义一次轮播的时间(默认为:0.2s) this.comsumeTime = tmpobj.comsumeTime !=undefined ? tmpobj.comsumeTime : 200; //定义轮播图的宽高(默认宽高为:700px * 250px) this.CFWidth = tmpobj.CFWidth !=undefined ? tmpobj.CFWidth : 700; this.CFHeight = tmpobj.CFHeight !=undefined ? tmpobj.CFHeight : 250; //定义轮播的风格 this.type = tmpobj.type == "small" ? 'small' : 'big'; //轮播图的按钮大小的宽高 this.AssowWidth = tmpobj.AssowWidth !=undefined ? tmpobj.AssowWidth : 76; this.AssowHeight = tmpobj.AssowHeight !=undefined ? tmpobj.AssowHeight : 112; //判断用户是否初始化 this.initFlag = true; //是否允许轮播图运行 this.applicationflag = true; } CarouselFigure.start = function(){ /** 第一部分类容:初始化整个轮播图和其运行数据 */ (function(){ //1. 判断用户是否进行初始化 if(CarouselFigure.initFlag == undefined){ CarouselFigure.init({}); } //2.1 初始化整个轮播图的div的基本大小 $("#CarouselFigure").width(CarouselFigure.CFWidth).height(CarouselFigure.CFHeight).css("position","relative"); //2.2 最中央的大图实际大小为: CarouselFigure.ImgWidth = CarouselFigure.CFWidth * 2/3; CarouselFigure.ImgHeight = CarouselFigure.CFHeight - 6; //3. 初始化轮播图按钮数据 CarouselFigure.setAssowdata = { prev:{ top:(CarouselFigure.CFHeight - CarouselFigure.AssowHeight)/2 +"px", left:CarouselFigure.CFWidth/6 - CarouselFigure.AssowWidth + 6 + "px", originUrl:$("#CarouselFigure > img:eq(0)").attr("src"), hoverUrl:$("#CarouselFigure > img:eq(1)").attr("src"), }, next:{ top:(CarouselFigure.CFHeight - CarouselFigure.AssowHeight)/2 +"px", left:CarouselFigure.CFWidth*5/6 + "px", originUrl:$("#CarouselFigure > img:eq(2)").attr("src"), hoverUrl:$("#CarouselFigure > img:eq(3)").attr("src"), } }; //4.1 初始化轮播图的url和src信息,存放到一个容器中 CarouselFigure.imageContains = []; $("#CarouselFigure ul li img").each(function(){ var tmpobj = {src:$(this).attr("src"),href:$(this).attr("href")} CarouselFigure.imageContains.push(tmpobj); }); //4.2 对轮播图容器数据进行处理,当轮播图的个数3<= x <= 5 只能使用small风格类型。当轮播图的个数 x < 3 时, 停止运行 if(CarouselFigure.imageContains.length < 3){ CarouselFigure.applicationflag = false; }else if(CarouselFigure.imageContains.length < 6){ CarouselFigure.type = 'small'; } //4.3 对轮播容器数据按顺序进行增倍,保证有足够数据进行轮播 var objstr = JSON.stringify(CarouselFigure.imageContains); CarouselFigure.imageContains = CarouselFigure.imageContains.concat(JSON.parse(objstr)); //5.1 轮播图使用big风格时,页面七张图在静态页面中的属性值 CarouselFigure.setViewPosData = new Object; CarouselFigure.setViewPosData.big = [ { width:CarouselFigure.ImgWidth*3/8, height:CarouselFigure.ImgHeight*3/8, left:0, top:0, zIndex:1, opacity:0.2, borderSize:0 },{ width:CarouselFigure.ImgWidth*3/8, height:CarouselFigure.ImgHeight*3/8, left:0, top:CarouselFigure.CFHeight*5/16, zIndex:2, opacity:0.7, borderSize:0 },{ width:CarouselFigure.ImgWidth*3/4, height:CarouselFigure.ImgHeight*3/4, left:CarouselFigure.CFWidth/18, top:CarouselFigure.CFHeight/8, zIndex:3, opacity:0.9, borderSize:0 },{ width:CarouselFigure.ImgWidth, height:CarouselFigure.ImgHeight, left:CarouselFigure.CFWidth/6, top:0, zIndex:4, opacity:1, borderSize:3 },{ width:CarouselFigure.ImgWidth*3/4, height:CarouselFigure.ImgHeight*3/4, left:CarouselFigure.CFWidth * 4/9, top:CarouselFigure.CFHeight/8, zIndex:3, opacity:0.9, borderSize:0 },{ width:CarouselFigure.ImgWidth*3/8, height:CarouselFigure.ImgHeight*3/8, left:CarouselFigure.CFWidth * 3/4, top:CarouselFigure.CFHeight*5/16, zIndex:2, opacity:0.7, borderSize:0 },{ width:CarouselFigure.ImgWidth*3/8, height:CarouselFigure.ImgHeight*3/8, left:CarouselFigure.CFWidth * 3/4, top:0, zIndex:1, opacity:0.2, borderSize:0 },]; //5.2 轮播图使用small风格时,页面5张图在静态页面中的属性值 CarouselFigure.setViewPosData.small = [ { width:CarouselFigure.ImgWidth*3/8, height:CarouselFigure.ImgHeight*3/8, left:0, top:0, zIndex:1, opacity:0.2, borderSize:0 },{ width:CarouselFigure.ImgWidth*3/4, height:CarouselFigure.ImgHeight*3/4, left:0, top:CarouselFigure.CFHeight/8, zIndex:2, opacity:0.9, borderSize:0 },{ width:CarouselFigure.ImgWidth, height:CarouselFigure.ImgHeight, left:CarouselFigure.CFWidth/6, top:0, zIndex:3, opacity:1, borderSize:3 },{ width:CarouselFigure.ImgWidth*3/4, height:CarouselFigure.ImgHeight*3/4, left:CarouselFigure.CFWidth * 1/2, top:CarouselFigure.CFHeight/8, zIndex:2, opacity:0.9, borderSize:0 },{ width:CarouselFigure.ImgWidth*3/8, height:CarouselFigure.ImgHeight*3/8, left:CarouselFigure.CFWidth * 3/4, top:0, zIndex:1, opacity:0.2, borderSize:0 }]; }()); //验证初始化是否成功,否则全部隐藏,结束进程 if(!CarouselFigure.applicationflag){ $("#CarouselFigure").css("display","none"); return false; } /** 第二部分: 对轮播图的箭头进行初始化(包括页面中的静态布局,和点击事件和悬浮事件) */ CarouselFigure.InitAssow = function (Assow,direction){ //实现轮播图箭头的静态样式、悬浮事件和点击事件 Assow.css({ position:"absolute", left:this.setAssowdata[direction].left, top:this.setAssowdata[direction].top, "z-index":4 }) .mouseover(function(){ //鼠标悬浮切换图片 $(this).attr("src",CarouselFigure.setAssowdata[direction].hoverUrl); }).mouseout(function(){ $(this).attr("src",CarouselFigure.setAssowdata[direction].originUrl); }).click(function(){ //记录点击事件的次数 CarouselFigure.clickArrowfun(direction); }); } //调用初始化轮播图函数--实现左右箭头全部功能 $("#CarouselFigure > img:odd").css("display","none"); CarouselFigure.InitAssow($("#CarouselFigure > img:eq(0)"),"prev"); CarouselFigure.InitAssow($("#CarouselFigure > img:eq(2)"),"next"); /** 第三部分: 对所有的轮播图进行页面静态布局 */ //初始化某张轮播图的方法 CarouselFigure.InitImages = function (i,setViewPosData,imageContains){ $("#CarouselFigure ul img:eq("+i+")").css({ position:"absolute", width:setViewPosData[i].width + "px", height:setViewPosData[i].height + "px", top:setViewPosData[i].top + "px", left:setViewPosData[i].left + "px", display:"block", "z-index":setViewPosData[i].zIndex, opacity:setViewPosData[i].opacity, }).attr({ src:imageContains[i].src, href:imageContains[i].href }).click(function(){ location.href = $(this).attr("href"); //绑定图片点击跳转事件 }); if( (i == 0 || i == 6) && this.type == 'big'){ //第1张图片和第7张图片不可见 $("#CarouselFigure ul img:eq("+i+")").css("display","none"); }else if(i == 3 && this.type == 'big'){ //为正中央图片加边框 $("#CarouselFigure ul img:eq("+i+")").css("border","3px solid #fff"); }else if( (i == 0 || i == 4)&&this.type == 'small'){//第1张图片和第5张图片不可见 $("#CarouselFigure ul img:eq("+i+")").css("display","none"); }else if(i == 2 && this.type == 'small'){ //为正中央图片加边框 $("#CarouselFigure ul img:eq("+i+")").css("border","3px solid #fff"); } } /** 实现七张图片的静态样式: 清空原有的li标签,然后新建<li><img></li>来存放每张轮播图。 */ $("#CarouselFigure ul").empty(); for(var i = 0; i < CarouselFigure.setViewPosData[CarouselFigure.type].length; i++){ $("#CarouselFigure ul").append('<li><img src=""></li>'); CarouselFigure.InitImages(i,CarouselFigure.setViewPosData[CarouselFigure.type],CarouselFigure.imageContains); } /** 第四部分: 形成轮播动画效果 */ /* 设置clickArrow变量:作为动画的标示位,让其进行队列化,必须本次动画完成,才能进行下次动画轮播。 1. 当为负数时向前轮播,比如:-5向前轮播五次动画; 2. 当为正数时向后轮播,同理; 3. 当等于0时,此时没有进行轮播。 */ CarouselFigure.clickArrow = 0 ; // 处理动画队列方法: CarouselFigure.clickArrowfun = function (direction){ if(this.clickArrow == 0){ this.startAnimation(direction); } if(direction == "prev"){ this.clickArrow--; }else if(direction == "next"){ this.clickArrow++; } } /** 开始一次轮播动画 其中composerAnimateNum变量为: 在一次动画中,记录每张轮播图完成的标识符; 在big风格类型中:当其值为6时说明此次动画全部完成 在small风格类型中:当其值为4时说明此次动画全部完成 */ CarouselFigure.startAnimation = function(direction){ this.completeAnimationNum = 0; if(direction == "prev"){ //从最后一张图片到第一张轮播图片,分别向前移动,首先让最后一张图片可视 if(this.type == "big"){ $("#CarouselFigure ul img:eq(6)").css("display","block"); }else{ $("#CarouselFigure ul img:eq(4)").css("display","block"); } for(var i = this.setViewPosData[this.type].length - 1 ; i > 0; i --){ this.startMove(i, this.setViewPosData[this.type][i],this.setViewPosData[this.type][i-1],direction); } }else if(direction == "next"){//从第一张图片到倒数第二张图片,分别向后移动,首先让第一张轮播图片可视 $("#CarouselFigure ul img:eq(0)").css("display","block"); for(var i = 0 ; i < this.setViewPosData[this.type].length - 1; i ++){ this.startMove(i, this.setViewPosData[this.type][i],this.setViewPosData[this.type][i+1],direction); } } } /** 功能:让一张轮播图从某一个状态变换到另一个状态 (包括位子、透明度、边框等等属性) */ CarouselFigure.startMove = function (index,startObj,endObj,direction){ //所有属性的增量 var increaseLeft = endObj.left - startObj.left; var increaseTop = endObj.top - startObj.top; var increaseWidth = endObj.width - startObj.width; var increaseHeight = endObj.height - startObj.height; var increaseOpacity = endObj.opacity - startObj.opacity; var increaseBorderSize = endObj.borderSize - startObj.borderSize; var time = this.frameNum; //共总帧数 var i = 1; //帧数的记步标志索引 //定义函数:一帧到下一帧的变化过程 function moveStep(){ setTimeout(function(){ var tmpObj = $("#CarouselFigure ul img:eq("+index+")"); //每一帧时图片的属性改变量 tmpObj.css({ width:startObj.width + (increaseWidth/time) * i + "px", height:startObj.height + (increaseHeight/time) * i + "px", top:startObj.top + (increaseTop/time) * i + "px", left:startObj.left + (increaseLeft/time) * i + "px", border:startObj.borderSize + (increaseBorderSize/time) * i + "px solid #fff", opacity:startObj.opacity + (increaseOpacity/time) * i, }); //当小于30帧时,继续递归,直至调用30次完成动画效果 if( i++ <time){ if(i == 15){//轮播图每张图片的层级关系处理方式 var zIndex = new Object; zIndex.big = {prev:[null,1,2,3,4,3,2],next:[2,3,4,3,2,1]}; zIndex.small = {prev:[null,1,2,3,2,1],next:[2,3,2,1]} tmpObj.css("z-index",zIndex[CarouselFigure.type][direction][index]); } moveStep(); //递归 }else{ CarouselFigure.completeAnimation(direction); //完成一张图片的动画 } },CarouselFigure.comsumeTime/time); } moveStep(); //开始动画 } /** 第五部分: 当每次轮播动画结束后的处理函数 1. 首先,判断一次轮播动画是否结束; 2. 对容器数据(imageContains)进行调整,形成队列 3. 重新渲染整个轮播图的静态页面 4. 通过clickArrow,处理动画队列 */ CarouselFigure.completeAnimation = function(direction){ this.completeAnimationNum++; //表示完成一次动画 if(this.completeAnimationNum == (this.setViewPosData[this.type].length -1)){ //重构用户自定义数据的顺序; if(direction == "prev"){ var tmp = this.imageContains.shift(); this.imageContains.push(tmp); }else if(direction == "next"){ var tmp = this.imageContains.pop(); this.imageContains.unshift(tmp); } //重新渲染轮播图七张图片的静态样式 for(var i = 0; i < this.setViewPosData[this.type].length; i++){ this.InitImages(i,this.setViewPosData[this.type],this.imageContains); } //解决边框的bug的问题 if(this.type == 'big'){ $("#CarouselFigure ul li img:even").css("border","0px"); }else{ $("#CarouselFigure ul li img:odd").css("border","0px"); } //处理动画队列 if(direction == "prev"){ this.clickArrow++; }else if(direction == "next"){ this.clickArrow--; } if(this.clickArrow > 0){ this.startAnimation(direction); }else if(this.clickArrow < 0){ this.startAnimation(direction); } } } };
broadcast.html
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>轮播图实例</title> <script src="js/jquery-3.3.1.min.js"></script> </head> <style> *{ padding:0px; margin:0px; } ul{ list-style:none; } body{ background:#eee; padding:10px; } #CarouselFigure{ } </style> <body> <div id="CarouselFigure"> <img src="img/prev.png" width="76" height="112" /> <img src="img/prev.png" /> <img src="img/next.png" width="76" height="112" /> <img src="img/next.png" /> <ul> <li><img src="img/1.jpg" width="500" height="250"></li> <li><img src="img/2.jpg"></li> <li><img src="img/3.jpg"></li> <li><img src="img/4.jpg"></li> <li><img src="img/5.jpg"></li> <li><img src="img/6.jpg"></li> <li><img src="img/7.jpg"></li> <li><img src="img/8.jpg"></li> </ul> </div> </body> </html> <script src="js/broadcast.js"></script> <script> $(function(){ //对轮播图进行初始化 CarouselFigure.init({type:'small',comsumeTime:1000}); CarouselFigure.start(); }) </script>
实现效果
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