


Sliding switching of mobile phone images. There are many such examples on the Internet, but they all rely on other components, which makes the code confusing. There is also the use of transform in CSS3: translate (x, y); to move elements, but I found that It was almost over on devices that did not support CSS3, so I decided to make one myself. Unexpectedly, there were many problems, the most important of which was adding links to images. The up and down scroll bars in the web page could not scroll when dragging the image. , and is not compatible with dragging on PC machines; here I will briefly introduce the problems encountered and solutions;
Problem 1: After adding a link to an image, it always jumps to other pages when dragging it
The main source of the problem is that it cannot determine whether it is click or drag. The general order of mobile phone events is touchstart-》mousedown-》mousemove-》touchmove-》mouseup-》touchend-》click, which may be different depending on different mobile phones. Events on touch screen mobile phones generally use touchstart -> touchmove -> touchend -> click. The click event is executed last. When we have touchstart, touchmove, and touchend processed, if we do not return or cancel the default, the click event will be triggered. , so the web page jumps away. The solution is to record the coordinate point of touchstart and the coordinate point of touchmove, and calculate whether the touch point has moved based on the two coordinate points. What is worth paying attention to is the Event parameter of the event. Touch screen is generally event. touches, event.targetTouches, event.changedTouches. During the test, I found that the values of the three parameters are the same. However, it is worth noting that the touchend event will not get the touch point coordinates (it may be a device problem). Touchmove will continue to start when moving. Sometimes touchmove will not Trigger, which means that the browser has a built-in function to detach the touch point (or mouse) from the selected element. For example, if you press and hold for a long time, a menu will appear (the picture on the PC will generate a thumbnail that can be dragged), so that To cancel the default, event.preventDefault(); must be used when touchingstart (mousedown).
Problem 2: The up and down scroll bars on the web page cannot scroll when dragging the image
I believe that this problem will be encountered as long as you make it. In fact, it is mainly because the default event event.preventDefault() is canceled when moving (touchmove, mousemove). What we need to do here is whether to move to obtain the touch point and Whether the starting contact points are consistent, if they are consistent, return directly, and also calculate whether the x-axis moves more or the y-axis moves more, so that we can cancel the default when sliding left and right, and not cancel when going to school;
Problem 3: And it is not compatible with dragging on PC machines
This is because when binding the event, you cannot completely consider whether the event name is touchstart or mousedown. I searched it on the Internet and felt that it was not done, so I copied it directly
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);
This is probably what it means, different events are bound according to different devices
In fact, I encountered a lot of problems, so I won’t explain them one by one
No more words, just posted the code. If there is anything that is not good, please include it and make comments
<!doctype html> <html> <head> <meta charset="utf-8"> <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport" /> <meta content="yes" name="apple-mobile-web-app-capable" /> <meta content="black" name="apple-mobile-web-app-status-bar-style" /> <meta content="telephone=no" name="format-detection" /> <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 id="k"> <div id="wapListImage"> <ul> <li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd" target="_black"><img src="/static/imghwm/default1.png" data-src="http://file25.mafengwo.net/M00/37/74/wKgB4lM9Hb-ARjpJAAOsX46Kq9w39.gonglve.w690.jpeg" class="lazy" alt="wap picture scrolling special effects without css3 elements pure js script writing_javascript skills" ></a></li> <li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="/static/imghwm/default1.png" data-src="http://file25.mafengwo.net/M00/F2/06/wKgB4lNaHHCASXmDAAFtZsUxuwQ66.gonglve.w690.jpeg" class="lazy" alt="wap picture scrolling special effects without css3 elements pure js script writing_javascript skills" ></a></li> <li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="/static/imghwm/default1.png" data-src="http://file25.mafengwo.net/M00/2B/EE/wKgB4lNwdpeAbvZiAAWcFRXe2Po83.gonglve.w690.jpeg" class="lazy" alt="wap picture scrolling special effects without css3 elements pure js script writing_javascript skills" ></a></li> <!-- <li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd" target="_black"><img src="/static/imghwm/default1.png" data-src="http://file25.mafengwo.net/M00/37/74/wKgB4lM9Hb-ARjpJAAOsX46Kq9w39.gonglve.w690.jpeg" class="lazy" alt="wap picture scrolling special effects without css3 elements pure js script writing_javascript skills" ></a></li> <li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="/static/imghwm/default1.png" data-src="http://file25.mafengwo.net/M00/F2/06/wKgB4lNaHHCASXmDAAFtZsUxuwQ66.gonglve.w690.jpeg" class="lazy" alt="wap picture scrolling special effects without css3 elements pure js script writing_javascript skills" ></a></li> <li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="/static/imghwm/default1.png" data-src="http://file25.mafengwo.net/M00/2B/EE/wKgB4lNwdpeAbvZiAAWcFRXe2Po83.gonglve.w690.jpeg" class="lazy" alt="wap picture scrolling special effects without css3 elements pure js script writing_javascript skills" ></a></li> --> </ul> <dl> <span class="selected">1</span> <span>2</span> <span>3</span> <!-- <span>4</span> <span>5</span> <span>6</span> --> </dl> </div> </div> <div style="height:200px;"></div> <div id="wapListImage1"> <ul> <li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd" target="_black"><img src="/static/imghwm/default1.png" data-src="http://file25.mafengwo.net/M00/37/74/wKgB4lM9Hb-ARjpJAAOsX46Kq9w39.gonglve.w690.jpeg" class="lazy" alt="wap picture scrolling special effects without css3 elements pure js script writing_javascript skills" ></a></li> <li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="/static/imghwm/default1.png" data-src="http://file25.mafengwo.net/M00/F2/06/wKgB4lNaHHCASXmDAAFtZsUxuwQ66.gonglve.w690.jpeg" class="lazy" alt="wap picture scrolling special effects without css3 elements pure js script writing_javascript skills" ></a></li> <li><a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" hrefto="ddd"><img src="/static/imghwm/default1.png" data-src="http://file25.mafengwo.net/M00/2B/EE/wKgB4lNwdpeAbvZiAAWcFRXe2Po83.gonglve.w690.jpeg" class="lazy" alt="wap picture scrolling special effects without css3 elements pure js script writing_javascript skills" ></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>
Usage:
After the page is loaded
var obj = { dom:document.getElementById('wapListImage'),//dom元素 isupdate:true,//是否自动切换 time:3000,//自动切换的时间毫秒 isfor:true, //是否循环播放,即到最后一张是否直接转入第一张,或到第一张直接转入最后一张 leftOrright:'left',//像左侧自动切换还是像右侧自动切换 callBack:function(obj){//切换成功后回调函数 其实有index参数为当前第几张图片 //自己处理 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)
If you don’t need multiple image switching effects, you can find var loaded=function()
in the codeDefine the number of switching pictures you need and name them
as
w.WapImage=new WapImage();
w.WapImages=new WapImage();
You can call it directly after the page is loaded
WapImage.start() and WapImages.start()

在 PowerPoint 中,实现图片滚动播放效果可通过设置幻灯片的转场效果来实现。在“幻灯片放映”选项卡下,通过“切片”下拉菜单选择水平方向的切片效果(如“从右往左”),调整切片速度和其他选项,即可让幻灯片以滚动的方式切换播放,从而实现图片滚动播放的效果。

两种方法:1、利用display属性,只需给元素添加“display:none;”样式即可。2、利用position和top属性设置元素绝对定位来隐藏元素,只需给元素添加“position:absolute;top:-9999px;”样式。

怎么制作文字轮播与图片轮播?大家第一想到的是不是利用js,其实利用纯CSS也能实现文字轮播与图片轮播,下面来看看实现方法,希望对大家有所帮助!

自适应布局又称“响应式布局”,是指可以自动识别屏幕宽度、并做出相应调整的网页布局;这样的网页能够兼容多个不同的终端,而不是为每个终端做一个特定的版本。自适应布局是为解决移动端浏览网页而诞生的,能够为使用不同终端的用户提供很好的用户体验。

实现方法:1、使用“:active”选择器选中鼠标点击图片的状态;2、使用transform属性和scale()函数实现图片放大效果,语法“img:active {transform: scale(x轴放大倍数,y轴放大倍数);}”。

Vue中如何实现图片的滚动和缩略图预览?在Vue项目中,我们经常需要展示大量的图片,并希望用户能够方便地浏览和预览这些图片。本文将介绍如何使用Vue组件实现图片的滚动和缩略图预览功能。首先,我们需要安装并引入合适的Vue库,以便于实现图片的滚动和缩略图预览。在本例中,我们将使用vue-awesome-swiper和vue-image-preview两个库来实

如何利用Vue实现图片的滚动和放大动画?Vue.js是一种流行的JavaScript框架,提供了丰富的功能和组件,使开发者能够轻松构建交互式和动态的Web应用程序。其中一个常见的应用场景是实现图片的滚动和放大动画。在本文中,我们将学习如何使用Vue.js来实现这样的功能,并提供相应的代码示例。首先,我们需要准备一个包含多张图片的数据列表。我们可以将图片的UR

css3中的动画效果有变形;可以利用“animation:动画属性 @keyframes ..{..{transform:变形属性}}”实现变形动画效果,animation属性用于设置动画样式,transform属性用于设置变形样式。


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