Created
July 17, 2018 19:06
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jq 图片校验（图片格式，长度和宽度，容量大小）
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| <input type="file" id="photoInput" /> |
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| if (!/\.(gif|jpg|jpeg|png|GIF|JPG|PNG)$/.test($('#'+fileId).val())){ | |
| alert("上传图片格式错误，请重新上传"); | |
| return; | |
| } |
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| //验证是否支持HTML5 | |
| var fileUpload = document.getElementById("photoInput"); | |
| if (typeof(fileUpload.files) != "undefined") { | |
| var reader = new FileReader(); | |
| //读取图片文件详细内容 | |
| reader.readAsDataURL($('#photoInput')[0].files[0]); | |
| reader.onload = function(e) { | |
| var image = new Image(); | |
| //从reader返回值，并且进行Base64的编码 | |
| image.src = e.target.result; | |
| //验证文件的长度和高度 | |
| image.onload = function() { | |
| var height = this.height; | |
| var width = this.width; | |
| if (height > 100 || width > 100) { | |
| alert("Height and Width must not exceed 100px."); | |
| return false; | |
| } else { | |
| alert("Uploaded image has valid Height and Width."); | |
| return true; | |
| } | |
| } | |
| } else { | |
| alert("This browser does not support HTML5."); | |
| return false; | |
| } | |
| } |
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| $(document).ready(function() { | |
| $("#photoInput").change(function() { | |
| var iSize = ($("#photoInput")[0].files[0].size / 1024); | |
| if (iSize / 1024 > 1) { | |
| if (((iSize / 1024) / 1024) > 1) { | |
| iSize = (Math.round(((iSize / 1024) / 1024) * 100) / 100); | |
| $("#lblSize").html(iSize + "Gb"); | |
| } else { | |
| iSize = (Math.round((iSize / 1024) * 100) / 100); | |
| $("#lblSize").html(iSize + "Mb"); | |
| } | |
| } else { | |
| iSize = (Math.round(iSize * 100) / 100); | |
| $("#lblSize").html(iSize + "kb"); | |
| } | |
| }); | |
| }); |
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