基于JQuery实现图片上传预览与删除操作

本文实例为大家分享了JQuery实现图片上传预览与删除的具体代码，经测试目前满足谷歌、火狐、360、IE6,7,8,9,10,11等浏览器，供大家参考，具体内容如下

1. preview.2.0.html

<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a><a href="/tag/tupian/" target="_blank" class="keywords">图片</a>预览@H_<a href="/tag/403/" target="_blank" class="keywords">403</a>_10@ <<a href="/tag/Meta/" target="_blank" class="keywords">Meta</a> http-equiv="content-type" content="text/html; charset=UTF-8"> <link rel="stylesheet" type="text/css" href="srdz.preview.2.0.css"> <script type="text/javascript" src="jquery.min.js"></script> <script type="text/javascript" src="srdz.preview.2.0.js"></script> <script type="text/javascript"> $(function(){ var p = new ImgPreview(); p.preview({previewid:"imgupload1"}); p.preview({previewid:"imgupload2"}); }); </script> </head> <body> <div align="center" style="width: 50%;padding: 50px 300px;" id="imgupload1"></div> <div align="center" style="width: 50%;padding: 50px 300px;" id="imgupload2"></div> </body> </html> </pre> </div> <p><h3>2. srdz.preview.2.0.css </h3></p> <div class="jb51code"> <pre class="brush:css;"> .btn-pic { display: block; position: relative; width: 120px; height: 40px; overflow: hidden; cursor: pointer; text-align: center; } <p>.btn-pic-bg {<br /> border: 1px solid #ff9000;<br /> background: none repeat scroll 0 0 #ff9000;<br /> color: #ffffff;<br /> text-decoration: none;<br /> }</p> <p>.btn-pic span {<br /> display: block;<br /> line-height: 39px;<br /> }</p> <p>.ipt-bg {<br /> display: block;<br /> position: absolute;<br /> top: 0;<br /> left: 0;<br /> width: 120px;<br /> height: 40px;<br /> font-size: 100px;<br /> opacity: 0;<br /> filter: alpha(opacity=0);<br /> }</p> <p>.spanc{<br /> color: red;<br /> }</p> <p>.drt {<br /> float: right;<br /> display: none;<br /> }</p> <p>.dft {<br /> float: left;<br /> }</p> </pre> </div> <p><h3>3. srdz.preview.2.0.js</h3> </p> <div class="jb51code"> <pre class="brush:js;"> function ImgPreview(){} <p>ImgPreview.prototype.preview=function(options){</p> <p>var time = new Date().getTime();<br /> var fileid = "file" + time;<br /> var xdelid = "xdel" + time;<br /> var delid = "del" + time;<br /> var viewid = "view" + time;</p> <p>var htm = "" +<br /> "<div>" +<br /> "<div class='dft'>" +<br /> "<a class='btn-pic btn-pic-bg' href='javascript:void(0);'>" +<br /> "<span>上传图片</span>" +<br /> "<input id='" + fileid + "' type='file' name='file' class='ipt-bg' />" +<br /> "</a>" +<br /> "</div>" +<br /> "<div id='" + xdelid + "' class='drt'>" +<br /> "<a class='btn-pic btn-pic-bg' href='javascript:void(0)'>" +<br /> "<span>删除图片</span>" +<br /> "<input type='button' id='" + delid + "' class='ipt-bg'/>" +<br /> "</a>" +<br /> "</div>" +<br /> "</div>" +<br /> "<div id='" + viewid + "'></div>";</p> <p>$("#" + options.previewid).html(htm);</p> <p>$("#" + fileid).bind("click",function(){</p> <p>var $this =$(this);</p> <p>var browser={<br /> isIE:function(ver){<br /> var b = document.createElement('b');<br /> b.innerHTML = '';<br /> return b.getElementsByTagName('i').length === 1;<br /> }<br /> };</p> <p>$this.change(function(){<br /> var regex=/(.*).(jpg|jpeg|png)$/;<br /> var val = $this.val();<br /> if(!regex.test(val)){<br /> $("#" + viewid).html("<span class='spanc'>请选择正确的<a href="/tag/tupian/" target="_blank" class="keywords">图片</a>（jpg、jpeg、png）!</span>");<br /> return;<br /> }</p> <p>if(browser.isIE(6)){<br /> HanderOther($this);<br /> }else if(browser.isIE(7) || browser.isIE(8) || browser.isIE(9)){<br /> HanderIE789($this);<br /> }else if(window.FileReader){<br /> HanderFileReader($this);<br /> }else{<br /> $("#" + viewid).html("<span class='spanc'>该浏览器<a href="/tag/buzhichi/" target="_blank" class="keywords">不支持</a>预览<a href="/tag/tupian/" target="_blank" class="keywords">图片</a>!</span>");<br /> }</p> <p>function HanderFileReader($this){<br /> var oFReader = new window.FileReader(),rFilter = /^(?:image\/bmp|image\/cis-cod|image\/gif|image\/ief|image\/jpeg|image\/jpeg|image\/jpeg|image\/pipeg|image\/png|image\/svg+xml|image\/tiff|image\/x-cmu-raster|image\/x-cmx|image\/x-icon|image\/x-portable-anymap|image\/x-portable-bitmap|image\/x-portable-graymap|image\/x-portable-pixmap|image\/x-rgb|image\/x-xbitmap|image\/x-xpixmap|image\/x-xwindowdump)$/i;<br /> oFReader.onload = function (oFREvent){<br /> $("#" + viewid).html("<img src='"+oFREvent.target.result+"' style='width:100%;height:100%;'/>");<br /> $("#" + xdelid).show();<br /> };</p> <pre><code>var aFiles = $this.get(0).files; if (aFiles.length == 0) { return; } if (!rFilter.test(aFiles[0].type)) { $("#" + viewid).html("<span class='spanc'>请选择正确的<a href="/tag/tupian/" target="_blank" class="keywords">图片</a>（jpg、jpeg、png）!</span>"); return; } oFReader.readAsDataURL(aFiles[0]);</code></pre> <p>}</p> <p>function HanderIE789($this){<br /> if(options.width != null && parseInt(options.width) > 0){<br /> $("#" + viewid).css("width",options.width + "px");<br /> }else{<br /> $("#" + viewid).css("width","378px");<br /> }<br /> if(options.height != null && parseInt(options.height) > 0){<br /> $("#" + viewid).css("height",options.height + "px");<br /> }else{<br /> $("#" + viewid).css("height","358px");<br /> }<br /> $("#" + viewid).css("filter","progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale,src='"+GetImgSrc($this)+"')");<br /> $("#" + xdelid).show();<br /> }</p> <p>function HanderOther($this){<br /> $("#" + viewid).html("<img src='"+$this.val()+"' style='width:100%;height:100%;'/>");<br /> $("#" + xdelid).show();<br /> }</p> <p>function GetImgSrc($this){<br /> $this.select();<br /> $this.blur();<br /> var imgSrc =document.selection.createRange().text;<br /> document.selection.empty();<br /> return imgSrc;<br /> }</p> <p>});<br /> });//绑定按钮事件</p> <p>$("#" + delid).bind("click",function(){<br /> var browser={<br /> isIE:function(ver){<br /> var b = document.createElement('b');<br /> b.innerHTML = '';<br /> return b.getElementsByTagName('i').length === 1;<br /> }<br /> };</p> <p>if(browser.isIE(7) || browser.isIE(8) || browser.isIE(9)){<br /> $("#" + fileid).val('');<br /> $("#" + viewid).css("filter","");<br /> $("#" + viewid).css("width","");<br /> $("#" + viewid).css("height","");<br /> $("#" + xdelid).hide();<br /> }else{<br /> $("#" + fileid).val('');<br /> $("#" + viewid).empty();<br /> $("#" + xdelid).hide();<br /> }<br /> });<br /> };</p> </pre> </div> <p><h3>4. jquery.min.js </h3></p> <p>更多精彩<a href="/tag/neirong/" target="_blank" class="keywords">内容</a>，请点击<a target="_blank" href="//www.jb51.cc/Special/896.htm">《jQuery<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a>操作汇总》</a>，进行深入学习和研究。</p> <p>以上就是本文的全部<a href="/tag/neirong/" target="_blank" class="keywords">内容</a>，希望对大家学习jquery程序设计有所帮助。</p></div> <div class="topcard-tags"><a href="/tag/jQuerytupianshanchu/" class="tag_link" target="_blank">jQuery图片删除</a></div> <ul class="list-group"> <li class="list-group-item"><a href="/jquery/48495.html" title="通过jquery-ui中的sortable来实现拖拽排序的简单实例">上一篇：通过jquery-ui中的sortable来实现拖</a><a href="/jquery/48491.html" title="jQuery前端开发35个小技巧" class="text-muted pull-right">下一篇：jQuery前端开发35个小技巧</a> </li> </ul> </div> </div> </div>  <div class="row row-sm"> <div class="col-sm-12 col-md-12 col-lg-12"> <div class="card"> <ins class="adsbygoogle" style="display:block" data-ad-format="autorelaxed" data-ad-client="ca-pub-4605373693034661" data-ad-slot="9144498553"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); 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