JQuery做出图片上传预览与删除步骤详解

PHP中文网 • 2025年3月8日 11:49:03 • 编程技术 • 阅读 2

这次给大家带来JQuery做出图片上传预览与删除步骤详解，JQuery做出图片上传预览与删除的注意事项有哪些，下面就是实战案例，一起来看一下。

1. preview.2.0.html

 上传图片预览     $(function(){  var p = new ImgPreview();  p.preview({previewid:"imgupload1"});   p.preview({previewid:"imgupload2"});  });

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2. srdz.preview.2.0.css

.btn-pic { display: block; position: relative; width: 120px; height: 40px; overflow: hidden; cursor: pointer; text-align: center;} .btn-pic-bg { border: 1px solid #ff9000; background: none repeat scroll 0 0 #ff9000; color: #ffffff; text-decoration: none;} .btn-pic span { display: block; line-height: 39px;} .ipt-bg { display: block; position: absolute; top: 0; left: 0; width: 120px; height: 40px; font-size: 100px; opacity: 0; filter: alpha(opacity=0);} .spanc{ color: red;} .drt { float: right; display: none;} .dft { float: left;}

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3. srdz.preview.2.0.js

function ImgPreview(){} ImgPreview.prototype.preview=function(options){   var time = new Date().getTime(); var fileid = "file" + time; var xdelid = "xdel" + time; var delid = "del" + time;  var viewid = "view" + time;   var htm = "" + "" +  "
" +   "" +    "上传图片" +    "" +   "" +  "
" +  "" +   "" +    "删除图片" +    "" +   "" +  "
" + "
" + "
";   $("#" + options.previewid).html(htm);   $("#" + fileid).bind("click",function(){     var $this =$(this);     var browser={   isIE:function(ver){    var b = document.createElement('b');    b.innerHTML = '';    return b.getElementsByTagName('i').length === 1;   }  };     $this.change(function(){   var regex=/(.*).(jpg|jpeg|png)$/;   var val = $this.val();   if(!regex.test(val)){    $("#" + viewid).html("请选择正确的图片（jpg、jpeg、png）!");    return;   }       if(browser.isIE(6)){    HanderOther($this);   }else if(browser.isIE(7) || browser.isIE(8) || browser.isIE(9)){    HanderIE789($this);   }else if(window.FileReader){    HanderFileReader($this);   }else{    $("#" + viewid).html("该浏览器不支持预览图片!");   }       function HanderFileReader($this){    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;    oFReader.onload = function (oFREvent){     $("#" + viewid).html("");     $("#" + xdelid).show();    };      var aFiles = $this.get(0).files;    if (aFiles.length == 0) { return; }    if (!rFilter.test(aFiles[0].type)) {      $("#" + viewid).html("请选择正确的图片（jpg、jpeg、png）!");      return;     }    oFReader.readAsDataURL(aFiles[0]);   }     function HanderIE789($this){    if(options.width != null && parseInt(options.width) > 0){     $("#" + viewid).css("width",options.width + "px");    }else{     $("#" + viewid).css("width","378px");    }    if(options.height != null && parseInt(options.height) > 0){     $("#" + viewid).css("height",options.height + "px");    }else{     $("#" + viewid).css("height","358px");    }    $("#" + viewid).css("filter","progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale,src='"+GetImgSrc($this)+"')");    $("#" + xdelid).show();   }     function HanderOther($this){    $("#" + viewid).html("");    $("#" + xdelid).show();   }     function GetImgSrc($this){    $this.select();    $this.blur();    var imgSrc =document.selection.createRange().text;    document.selection.empty();    return imgSrc;   }          }); });//绑定按钮事件   $("#" + delid).bind("click",function(){  var browser={    isIE:function(ver){     var b = document.createElement('b');     b.innerHTML = '';     return b.getElementsByTagName('i').length === 1;    }   };     if(browser.isIE(7) || browser.isIE(8) || browser.isIE(9)){   $("#" + fileid).val('');   $("#" + viewid).css("filter","");   $("#" + viewid).css("width","");   $("#" + viewid).css("height","");   $("#" + xdelid).hide();  }else{   $("#" + fileid).val('');   $("#" + viewid).empty();   $("#" + xdelid).hide();  } });};