脚本不适用于JQuery 1.9 [英] Script does not work with JQuery 1.9
问题描述
我真的很努力尝试找出此脚本中与JQuery 1.9.0不兼容的内容.它在1.7.2下可以正常工作.
I am really struggling trying to find out what in this script is not JQuery 1.9.0 compatible. It works fine with 1.7.2.
应该拍摄一张用户选择上传的图片,并在实际上传之前使用HTML5展示它.
It's supposed to take a picture the users chooses to upload and show it using HTML5 before actually uploading it.
我希望有人能敏锐地发现错误!
I hope someone have a sharp eye to spot the error!
// convert bytes into friendly format
function bytesToSize(bytes) {
var sizes = ['Bytes', 'KB', 'MB'];
if (bytes == 0) return 'n/a';
var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
return (bytes / Math.pow(1024, i)).toFixed(1) + ' ' + sizes[i];
};
// check for selected crop region
function checkForm() {
if (parseInt($('#w').val())) return true;
$('.error').html('Please select a crop region and then press Upload').show();
return false;
};
// update info by cropping (onChange and onSelect events handler)
function updateInfo(e) {
$('#x1').val(e.x);
$('#y1').val(e.y);
$('#x2').val(e.x2);
$('#y2').val(e.y2);
$('#w').val(e.w);
$('#h').val(e.h);
};
// clear info by cropping (onRelease event handler)
function clearInfo() {
$('.info #w').val('');
$('.info #h').val('');
};
function fileSelectHandler() {
// get selected file
var oFile = $('#image_file')[0].files[0];
// hide all errors
$('.error').hide();
// check for image type (jpg and png are allowed)
var rFilter = /^(image\/jpeg|image\/png)$/i;
if (! rFilter.test(oFile.type)) {
$('.error').html('Please select a valid image file (jpg and png are allowed)').show();
return;
}
// check for file size
if (oFile.size > 250 * 1024) {
$('.error').html('You have selected too big file, please select a one smaller image file').show();
return;
}
// preview element
var oImage = document.getElementById('preview');
// prepare HTML5 FileReader
var oReader = new FileReader();
oReader.onload = function(e) {
// e.target.result contains the DataURL which we can use as a source of the image
oImage.src = e.target.result;
oImage.onload = function () { // onload event handler
// display step 2
$('.step2').fadeIn(500);
// display some basic image info
var sResultFileSize = bytesToSize(oFile.size);
$('#filesize').val(sResultFileSize);
$('#filetype').val(oFile.type);
$('#filedim').val(oImage.naturalWidth + ' x ' + oImage.naturalHeight);
// Create variables (in this scope) to hold the Jcrop API and image size
var jcrop_api, boundx, boundy;
// destroy Jcrop if it is existed
if (typeof jcrop_api != 'undefined')
jcrop_api.destroy();
// initialize Jcrop
$('#preview').Jcrop({
aspectRatio : 178 / 200, // keep aspect ratio 1:1
minSize: [178, 200],
boxWidth: 534,
boxHeihgt: 600,
bgFade: true, // use fade effect
bgOpacity: .3, // fade opacity
onChange: updateInfo,
onSelect: updateInfo,
onRelease: clearInfo
}, function(){
// use the Jcrop API to get the real image size
var bounds = this.getBounds();
boundx = bounds[0];
boundy = bounds[1];
// Store the Jcrop API in the jcrop_api variable
jcrop_api = this;
});
};
};
// read selected file as DataURL
oReader.readAsDataURL(oFile);
}
推荐答案
jQuery 1.9删除了以前不推荐使用的所有旧功能.
jQuery 1.9 has dropped a whole load of old features that had previously been deprecated.
我建议您阅读jQuery提供的说明,以将其从以前的版本升级到1.9.有很多东西已经被删除或更改,所以除非您一直保持最新的推荐最佳实践,否则您很可能会被某些东西吸引住.
I suggest you read the notes provided by jQuery for upgrading to 1.9 from previous releases. There's quite a lot of stuff that's been removed or changed, so unless you've been keeping right up-to-date with their recommended best practices, you are quite likely to be caught out by something.
以下是升级指南: http://jquery.com/upgrade-guide/1.9/
这篇关于脚本不适用于JQuery 1.9的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!