wap手机图片滑动切换特效无css3元素js脚本编写

日期：2020-06-11 栏目：程序人生浏览：次

手机图片滑动切换，网上有很多这样的例子，但都借助于其他组件，让代码混乱的不行；还有就是用到css3里的 transform：translate（x,y）;移动元素,不过发现在不支持css3的设备上马上完蛋了，所有下定决心自己做一个，谁知出现了很多的问题，其中最重要的是给图片加链接，网页中的上下滚动条不能在拖动图片的时候滚动，并且不能兼容pc机器上的拖动；在这里就简单介绍一下遇到的问题和解决的方法；

问题一：给图片加上链接后，在拖动的时候总是跳到其他页面；

　　问题根源主要是不能判断是点击还是拖动，手机事件一般顺序是 touchstart-》mousedown-》mousemove-》touchmove-》mouseup-》touchend-》click，根据不同手机可能会有不同。触屏手机的事件一般都用 touchstart -》 touchmove -》 touchend -》 click，click事件是最后执行的，当我们有touchstart，touchmove，touchend处理完后，如果不进行return或取消默认就会触发click事件，这样网页就跳走了，解决办法是记录touchstart的坐标点和touchmove的坐标点，根据两个坐标点算出触点是否移动过，其中值得关注的是事件的Event参数，触屏一般是 event.touches，event.targetTouches，event.changedTouches。我在测试当中发现者三个参数的值时一样的，不过值得注意的是touchend事件不会得到触点坐标（也或许是设备问题），在移动的时候touchmove会不断出发，有时候touchmove会不触发，其中就是浏览器自带一下功能把触点（或鼠标）脱离了选中的元素，比如上时间按住会出现菜单，（pc上图片就会生成一个可以拖动的缩略图），这样就要在touchstart（mousedown）的时候先 event.preventDefault();取消默认。

问题二：网页中的上下滚动条不能在拖动图片的时候滚动；

相信这个问题只要制作过得都会遇到，其实主要是在移动（touchmove，mousemove）的时候取消了默认事件event.preventDefault(),在这里我们需要做的是，是否移动获得触点和开始的触点是否一致，如果一致就直接返回，还要算出是移动的x轴多一点还是y轴移动的多一点，这样我们就可以做左右滑动的时候取消默认，在上学的时候不取消；

问题三：并且不能兼容pc机器上的拖动

这是因为在绑定事件的时候不能完全考虑事件名称是touchstart还是mousedown ，从网上搜了一下，感觉做的不做，就直接抄过来了

this.eventName={ touchstart:'touchstart', touchmove:'touchmove', touchend:'touchend', }

在做判断

if(!device){ this.eventName.touchstart='mousedown'; this.eventName.touchmove='mousemove'; this.eventName.touchend='mouseup'; }

dom.addEventListener(this.eventName.touchstart,handleEvent,false);
大概是这个意思，根据设备不同绑定不同的事件

其实还碰到了很多的问题，就不一一说明了

不多说了，直接把代码贴出来了，如果有什么不太好的地方，还请多多包含和提出意见

<!doctype html> <html> <head> <meta charset="utf-8"> <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" /> <meta content="yes" /> <meta content="black" /> <meta content="telephone=no" /> <title></title> <style type="text/css"> html,body,*{ margin: 0; padding: 0; border: 0;} #wapListImage1, #wapListImage{width: 100%; overflow: hidden; height: auto; cursor: move; zoom:1; position: relative;} #wapListImage1 ul, #wapListImage1 ul li, #wapListImage1 ul, #wapListImage ul li{ list-style: none;} #wapListImage1 ul, #wapListImage ul{width: 99999px;} #wapListImage1 ul li, #wapListImage ul li{ float: left;} #wapListImage ul li a img:focus, #wapListImage ul li a img:checked, #wapListImage ul li a img, #wapListImage ul li a img:active, #wapListImage ul li a,#wapListImage ul li a:active{cursor: move;} #wapListImage dl{ position: absolute; bottom: 10px; right: 0;} #wapListImage dl span{overflow: hidden;width: 10px; height: 10px; background-color: #900; display: inline-block;} #wapListImage dl span.selected{ background-color: #000;} </style> </head> <body> <div> <div> <ul> <li><a href="javascript:void(0)" hrefto="ddd" target="_black"><img src="https://file25.mafengwo.net/M00/37/74/wKgB4lM9Hb-ARjpJAAOsX46Kq9w39.gonglve.w690.jpeg"></a></li> <li><a href="javascript:void(0)" hrefto="ddd"><img src="https://file25.mafengwo.net/M00/F2/06/wKgB4lNaHHCASXmDAAFtZsUxuwQ66.gonglve.w690.jpeg"></a></li> <li><a href="javascript:void(0)" hrefto="ddd"><img src="https://file25.mafengwo.net/M00/2B/EE/wKgB4lNwdpeAbvZiAAWcFRXe2Po83.gonglve.w690.jpeg"></a></li>  </ul> <dl> <span>1</span> <span>2</span> <span>3</span>  </dl> </div> </div> <div></div> <div> <ul> <li><a href="javascript:void(0)" hrefto="ddd" target="_black"><img src="https://file25.mafengwo.net/M00/37/74/wKgB4lM9Hb-ARjpJAAOsX46Kq9w39.gonglve.w690.jpeg"></a></li> <li><a href="javascript:void(0)" hrefto="ddd"><img src="https://file25.mafengwo.net/M00/F2/06/wKgB4lNaHHCASXmDAAFtZsUxuwQ66.gonglve.w690.jpeg"></a></li> <li><a href="javascript:void(0)" hrefto="ddd"><img src="https://file25.mafengwo.net/M00/2B/EE/wKgB4lNwdpeAbvZiAAWcFRXe2Po83.gonglve.w690.jpeg"></a></li> </ul> </div> <script type="text/javascript"> ;(function(w,d){ var device = (/android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini/i.test(navigator.userAgent.toLowerCase())); function WapImage(){ this.options={ dom: null, speed:200, isupdate:true, time:3000, leftOrright:'left', isfor:false, callBack:function(){} }, this.eventName={ touchstart:'touchstart', touchmove:'touchmove', touchend:'touchend', }, this.point={ x:5, y:5, pageX1:0, pageX2:0, pageY1:0, pageY2:0 }, this.page={ bodyWidth:320, domUL:null, liList:null, index: 0, flag:false, sTime:0, eTime:0, isDown:false, mleft:0, back:30, moveId:[], nextId:null, prevId:null, isdom:false }, this.Event={ handleEvent: function(event,lib){ event = event ? event : window.event; // console.log(event.type) switch(event.type){ case "touchstart": var touch = event.touches[0]; case "mousedown": if(lib.page.isDown) return; lib.page.isDown=true; lib.page.sTime=lib.page.eTime=new Date().getTime(); lib.Event.stop(lib,lib); if(event.type=="mousedown"){ touch = event; event.preventDefault(); } lib.point.pageX1 = lib.point.pageX2 = touch.pageX; lib.point.pageY1 = lib.point.pageY2 = touch.pageY; lib.page.mleft = parseFloat(lib.page.domUL.style.marginLeft); lib.page.mleft = lib.page.mleft ? lib.page.mleft : 0; break; case "touchmove": var touch = event.touches[0]; case "mousemove": if(!lib.page.isDown) return; if(event.type=="mousemove"){ touch = event; } lib.point.pageX2 = touch.pageX; lib.point.pageY2 = touch.pageY; if(lib.point.pageX1==lib.point.pageX2){ event.preventDefault(); return false; } var changeX = lib.point.pageX1 - lib.point.pageX2; var changeY = lib.point.pageY1 - lib.point.pageY2; if(Math.abs(changeX)>Math.abs(changeY)) {//左右事件 event.preventDefault(); lib.page.domUL.style.marginLeft=lib.page.mleft-changeX+'px'; if(parseFloat(lib.page.domUL.style.marginLeft)<= -(lib.page.liList.length-1)*lib.page.bodyWidth){ lib.page.domUL.style.marginLeft= -(lib.page.liList.length-1)*lib.page.bodyWidth+'px'; lib.page.mleft=-(lib.page.liList.length-1)*lib.page.bodyWidth; } if(parseFloat(lib.page.domUL.style.marginLeft)>0){ lib.page.domUL.style.marginLeft='0px'; lib.page.mleft=0; } }else if(Math.abs(changeY)>Math.abs(changeX)){//上下事件 }else{//长按或点击 } break; case "mouseup": case "touchend": if(!lib.page.isDown) return; lib.page.eTime=new Date().getTime(); lib.page.mleft = parseFloat(lib.page.domUL.style.marginLeft); lib.page.mleft = lib.page.mleft ? lib.page.mleft : 0; var changeX = lib.point.pageX1 - lib.point.pageX2; var changeY = lib.point.pageY1 - lib.point.pageY2; if(Math.abs(changeX)>Math.abs(changeY)) {//左右事件 event.preventDefault(); lib.Event.move.call(this,lib); }else if(Math.abs(changeY)>Math.abs(changeX)){//上下事件 lib.Event.move.call(this,lib); }else{//长按或点击 if((lib.page.eTime - lib.page.sTime) > 300) {//长按 }else{//点击 if(event.button==0 || event.type=='touchend'){ var a = lib.page.liList[lib.page.index].getElementsByTagName('a')[0]; if(typeof a.getAttribute('target')=='object'){ w.location=a.getAttribute('hrefto') }else{ w.open(a.getAttribute('hrefto')); } } } } lib.page.isDown=false; break; default: break; } }, position: function(lib,index){ // if(index==undefined){ // lib.page.domUL.style.marginLeft= -(lib.page.index*lib.page.bodyWidth) +'px'; // }else{ // lib.page.domUL.style.marginLeft= -(index*lib.page.bodyWidth) +'px'; // lib.page.index=index; // } if(!lib.options.isfor){ if(index==undefined){ lib.page.domUL.style.marginLeft= -(lib.page.index*lib.page.bodyWidth) +'px'; }else{ lib.page.domUL.style.marginLeft= -((index-1)*lib.page.bodyWidth) +'px'; lib.page.index=index-1; } lib.options.callBack({"index":parseInt(lib.page.liList[lib.page.index].getAttribute('index'))+1}); }else{ if(index==undefined){ lib.page.domUL.style.marginLeft= -lib.page.bodyWidth +'px'; }else{ lib.page.domUL.style.marginLeft= -lib.page.bodyWidth +'px'; while(true){ if(parseInt(index)==parseInt(lib.page.liList[1].getAttribute('index'))+1){ break; } lib.page.domUL.insertBefore(lib.page.liList[lib.page.liList.length-1],lib.page.liList[0]); } } lib.options.callBack({"index":parseInt(lib.page.liList[1].getAttribute('index'))+1}); } }, stop:function(lib){ for(var i =0;i<lib.page.moveId.length;i++){ clearInterval(lib.page.moveId[i]); } lib.page.moveId=[]; }, start:function(lib){ if(lib.options.isupdate){ lib.page.moveId[lib.page.moveId.length] = setInterval(function(){ if(lib.options.leftOrright=='left'){ lib.Event.next(lib,lib); }else{ lib.Event.prev(lib,lib); } },lib.options.time); } }, next:function(lib){ // console.log(lib.page.prevId.length+"nextId") // for (var n=0;n<lib.page.prevId.length;n++) { // // clearInterval(lib.page.prevId[n]); // }; // lib.page.prevId=[]; clearInterval(lib.page.prevId); lib.page.prevId=null; // var left = (lib.page.bodyWidth-Math.abs(lib.point.pageX1-lib.point.pageX2))/lib.options.speed; var yu = Math.abs(parseInt(lib.page.domUL.style.marginLeft)); while(true){ if(yu==0){ yu=lib.page.bodyWidth; break; }else if(yu<0){ yu= Math.abs(yu); break; } yu=yu-lib.page.bodyWidth } // var left = (lib.page.bodyWidth-Math.abs(parseFloat(lib.page.domUL.style.marginLeft)%lib.page.bodyWidth))/lib.options.speed; var left = yu/lib.options.speed; var c = 0; if(lib.page.index==lib.page.liList.length-1){ lib.page.flag=false; return; } clearInterval(lib.page.nextId); lib.page.nextId = window.setInterval(function(){ // lib.Event.stop(lib,lib); // if(lib.page.moveId==null){ // clearInterval(id); // } c=c+5; lib.page.domUL.style.marginLeft= (parseFloat(lib.page.domUL.style.marginLeft)-left*5)+'px'; // console.log("next"+lib.page.domUL.style.marginLeft); if(c>=lib.options.speed || parseFloat(lib.page.domUL.style.marginLeft)<= -(lib.page.liList.length-1)*lib.page.bodyWidth ){ if(parseFloat(lib.page.domUL.style.marginLeft)<= -(lib.page.liList.length-1)*lib.page.bodyWidth){ lib.page.domUL.style.marginLeft= -(lib.page.liList.length-1)*lib.page.bodyWidth+'px'; } clearInterval(lib.page.nextId); // for(var n=0;n=lib.page.nextId.length;n++){ // clearInterval(lib.page.nextId[0]); // } // lib.page.nextId=[]; lib.page.index++; lib.page.flag=false; lib.Event.domUpdate.call(this,lib,'r'); if(lib.page.moveId.length==0){ lib.Event.start(lib,lib); } } },5); }, prev:function(lib){ // console.log(lib.page.nextId.length+"nextId") // for(var n=0;n=lib.page.nextId.length;n++){ // // clearInterval(lib.page.nextId[0]); // } clearInterval(lib.page.nextId); lib.page.nextId=null; // lib.page.nextId=[]; // var left = (lib.page.bodyWidth-Math.abs(lib.point.pageX1-lib.point.pageX2))/lib.options.speed; // var left = (lib.page.bodyWidth-Math.abs(parseFloat(lib.page.domUL.style.marginLeft)%lib.page.bodyWidth))/lib.options.speed; var yu = Math.abs(parseInt(lib.page.domUL.style.marginLeft)); // console.log(yu+"----"+lib.page.domUL.style.marginLeft) while(true){ if(yu==0){ yu=lib.page.bodyWidth; break; }else if(yu<0){ yu= lib.page.bodyWidth-Math.abs(yu); break; } yu=yu-lib.page.bodyWidth } // var left = (lib.page.bodyWidth-yu)/lib.options.speed; var left = yu/lib.options.speed; var c = 0,id; if(lib.page.index==0){ lib.page.flag=false; return; } var ml = parseFloat(lib.page.domUL.style.marginLeft); clearInterval(lib.page.prevId); lib.page.prevId = window.setInterval(function(){ c=c+5; lib.page.domUL.style.marginLeft= (parseFloat(lib.page.domUL.style.marginLeft)+left*5)+'px'; // console.log(lib.page.domUL.style.marginLeft); if(c>=lib.options.speed || parseFloat(lib.page.domUL.style.marginLeft)>=0){ if(parseFloat(lib.page.domUL.style.marginLeft)>=0){ lib.page.domUL.style.marginLeft='0px'; } clearInterval(lib.page.prevId); // for (var n=0;n<lib.page.prevId.length;n++) { // clearInterval(lib.page.prevId[n]); // }; // lib.page.prevId=[]; lib.page.index--; lib.page.flag=false; lib.Event.domUpdate.call(this,lib,'l'); if(lib.page.moveId.length==0){ lib.Event.start(lib,lib); } } },5); }, move:function(lib){ if(lib.page.flag) return; lib.page.flag=true; if(Math.abs(lib.point.pageX1-lib.point.pageX2)<lib.page.back){ var h = Math.abs(Math.abs(parseFloat(lib.page.domUL.style.marginLeft))-Math.abs(lib.page.bodyWidth*lib.page.index)) h = h/70; var hi = 0; var hid; hid = window.setInterval(function(){ if(lib.point.pageX2>lib.point.pageX1){ lib.page.domUL.style.marginLeft = (parseFloat(lib.page.domUL.style.marginLeft) - h*5) +'px'; }else{ lib.page.domUL.style.marginLeft = (parseFloat(lib.page.domUL.style.marginLeft) + h*5) + 'px'; } hi=hi+5; if(hi>=70){ clearInterval(hid); lib.page.domUL.style.marginLeft= -(lib.page.index*lib.page.bodyWidth) +'px'; lib.page.flag=false; } },5); return; } if(lib.point.pageX1-lib.point.pageX2>0){ lib.Event.next.call(this,lib); }else if(lib.point.pageX2-lib.point.pageX1>0){ // console.log("===") lib.Event.prev.call(this,lib); } }, domUpdate: function(lib,type){ if(lib.page.isdom) return; lib.page.isdom=true; if(!lib.options.isfor){ var index = lib.page.liList[lib.page.index].getAttribute('index'); lib.options.callBack({"index":parseInt(index)+1}); lib.page.isdom=false; return; } if(type=='l'){ lib.page.domUL.insertBefore(lib.page.liList[lib.page.liList.length-1],lib.page.liList[0]); lib.page.domUL.style.marginLeft=-lib.page.bodyWidth+'px';//(parseFloat(lib.page.domUL.style.marginLeft)-lib.page.bodyWidth)+'px'; //lib.page.index++; }else if(type=='r'){ lib.page.domUL.appendChild(lib.page.liList[0]); lib.page.domUL.style.marginLeft=-lib.page.bodyWidth+'px';//(parseFloat(lib.page.domUL.style.marginLeft)+lib.page.bodyWidth)+'px'; //lib.page.index--; } lib.page.index=1; // console.log(lib.page.index) var index = lib.page.liList[lib.page.index].getAttribute('index'); lib.options.callBack({"index":parseInt(index)+1}); lib.page.isdom=false; } }; }; WapImage.prototype = { setoption: function(arg){ for(var i in this.options){ this.options[i]= arg[i] !== undefined ? arg[i] : this.options[i]; } if(!device){ this.eventName.touchstart='mousedown'; this.eventName.touchmove='mousemove'; this.eventName.touchend='mouseup'; } //return temp; }, bindEvent: function(){ var lib = this; this.page.domUL.addEventListener(this.eventName.touchstart,function(event){lib.Event.handleEvent.call(lib,event,lib);},false); w.addEventListener(this.eventName.touchmove,function(event){lib.Event.handleEvent.call(lib,event,lib);},false); w.addEventListener(this.eventName.touchend,function(event){lib.Event.handleEvent.call(lib,event,lib);},false); w.addEventListener('resize',function(){lib.init();},false); }, init:function(){ this.page.bodyWidth=document.body.clientWidth; this.page.liList= this.options.dom.getElementsByTagName('li'); this.page.domUL = this.options.dom.getElementsByTagName('ul')[0]; this.options.dom.style.width=this.page.bodyWidth+'px'; for(var i=0;i<this.page.liList.length;i++){ var item = this.page.liList[i]; var img = item.getElementsByTagName('img')[0]; item.setAttribute('index',i); item.style.width=this.page.bodyWidth+'px'; img.style.width = this.page.bodyWidth+'px'; } if(this.page.liList.length<3){ var length = this.page.liList.length; if(length==1){ this.page.domUL.appendChild(this.page.liList[0].cloneNode(true)); this.page.domUL.appendChild(this.page.liList[0].cloneNode(true)); }else{ for(var i=0;i<length;i++){ this.page.domUL.appendChild(this.page.liList[i].cloneNode(true)); } } this.page.liList= this.options.dom.getElementsByTagName('li'); } }, position:function(index){ this.Event.position.call(this,this,index); }, next:function(){ this.Event.next.call(this,this); }, prev:function(){ this.Event.prev.call(this,this); }, start: function(arg){ this.setoption(arg); this.init(); this.position(); this.bindEvent(); this.Event.domUpdate(this,'l'); this.Event.start(this); } }; var loaded=function(){ w.WapImage=new WapImage(); w.WapImages=new WapImage(); }; (function(){ if(d.body){ loaded(); }else{ if(d.addEventListener){ d.addEventListener( 'DOMContentLoaded', function(){ d.removeEventListener( 'DOMContentLoaded', arguments.callee, false ); loaded(); }, false ); }else if(d.attachEvent){ d.attachEvent( 'onreadystatechange', function(){ if( d.readyState === 'complete' ){ d.detachEvent( 'onreadystatechange', arguments.callee ); loaded(); } }); } } })(); })(window,document,undefined); window.onload = function(){ var obj = { dom:document.getElementById('wapListImage'), isupdate:true, time:3000, isfor:true, leftOrright:'left', callBack:function(obj){ var span = document.getElementById('wapListImage').getElementsByTagName('dl')[0].getElementsByTagName('span'); for(var k = 0;k<span.length;k++){ span[k].className=''; } span[obj.index-1].className='selected' // console.log(obj.index) } }; WapImage.start(obj); WapImage.position(2) var obj2 = { dom:document.getElementById('wapListImage1'), callBack:function(obj){ // console.log(obj.index) } }; WapImages.start(obj2); // var img = new w.WapImage(); // img.start(obj); } </script> </body> </html>

用法：

在页面加载完成后

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wap手机图片滑动切换特效无css3元素js脚本编写

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