在Ajax上传中实现JCrop [英] Implementing JCrop in ajax upload
本文介绍了在Ajax上传中实现JCrop的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试使用JQuery开发图像裁剪. 我使用ajax上传图片.映像成功后完全上传.我使用jquery将上传的图片加载到其容器中.
I'm trying to develop image crop using JQuery. I use ajax to upload the image. after the image success fully uploaded. I load the uploaded image using jquery to its container.
$("#image_upload").html("<img src='" + data.path + "' width=\"460\" id=\"cropbox\" alt=\"cropbox\" />");
，但是图像选择无效.为什么会发生呢? 这是我的代码:
but the image selection doesnt work. why it could be happened ? this is my code:
<style type="text/css">
#preview {
width: 150px;
height: 150px;
overflow: hidden;
}
</style>
<script type="text/javascript" src="<?php echo base_url()?>asset/jqupload/js/ajaxfileupload.js">
</script>
<script type="text/javascript" src="<?php echo base_url()?>asset/jcrop/jquery.Jcrop.pack.js">
</script>
<link rel="stylesheet" href="<?php echo base_url()?>asset/jcrop/jquery.Jcrop.css" type="text/css" />
<script type="text/javascript">
function ajaxFileUpload(){
$("#loading").ajaxStart(function(){
$(this).show();
}).ajaxComplete(function(){
$(this).hide();
});
$.ajaxFileUpload({
url: '<?php echo site_url()?>/upload/do_upload',
secureuri: false,
fileElementId: 'fileToUpload',
dataType: 'json',
success: function(data, status){
if (typeof(data.error) != 'undefined') {
if (data.error != '') {
$("#image_upload").html(data.error);
$("#image_upload").fadeIn("slow");
}
else {
$("#image_upload").html("<img src='" + data.path + "' width=\"460\" id=\"cropbox\" alt=\"cropbox\" />");
$("#image_upload").fadeIn("slow");
$("#orig_h").val(data.width);
$("#orig_w").val(data.height);
//alert("<a href='" + data.path + "' />");
}
}
},
error: function(data, status, e){
$("#image_upload").html(e);
$("#image_upload").fadeIn("slow");
}
})
return false;
}
$(document).ready(function(){
$(function(){
$('#cropbox').Jcrop({
aspectRatio: 1,
setSelect: [0, 0, $("#oring_w").val(), $("#oring_h").val()],
onSelect: updateCoords,
onChange: updateCoords
});
});
function updateCoords(c){
showPreview(c);
$("#x").val(c.x);
$("#y").val(c.y);
$("#w").val(c.w);
$("#h").val(c.h);
}
function showPreview(coords){
var rx = $("#oring_w").val() / coords.w;
var ry = $("#oring_h").val() / coords.h;
$("#preview img").css({
width: Math.round(rx * $("#oring_w").val()) + 'px',
height: Math.round(ry * $("#oring_h").val()) + 'px',
marginLeft: '-' + Math.round(rx * coords.x) + 'px',
marginTop: '-' + Math.round(ry * coords.y) + 'px'
});
}
});
</script>
<!-- begin main content -->
<div id="templatemo_content_area">
<h1 class="content_title">Label Info<hr/></h1>
<div id="templatemo_bi_full">
<h2>Label Setting</h2>
<div id="container">
</div>
<!--container-->
<br/>
<h2>Avatar</h2>
<div class="info">
</div>
<div id="avatar_container">
<form name="form" action="" method="POST" enctype="multipart/form-data">
<ul>
<li class="leftHalf ">
<label class="desc" for="lbl_type">
Change Your Avatar
</label>
<div>
<div id="avatar">
<img src="<?php echo $avatar?>" width="130" height="130" />
</div>
<div id="avatar_upload">
<input id="fileToUpload" name="fileToUpload" class="field field" value="" size="30" tabindex="5" type="file" /><input id="buttonUpload" name="buttonUpload" class="btTxt submit" type="submit" value="Upload" onclick="return ajaxFileUpload();"/><img id="loading" src="<?php echo base_url()?>asset/jqupload/images/loading.gif" style="display:none;">
</div>
</div>
</li>
</ul>
<ul id="crop_container">
<li class="leftHalf ">
<label class="desc" for="lbl_name">
Avatar for crop
</label>
<div id="image_upload">
<img src="<?php echo $avatar?>" width="450" height="130" id="cropbox" name="cropbox" />
</div>
</li>
<li class="rightHalf ">
<label class="desc" for="lbl_type">
Crop Display
</label>
<div id="preview">
<img src="<?php echo base_url() . 'files/' ?>" alt="thumb" />
</div>
</li>
<div class="info">
</div>
<li class="buttons ">
<input name="saveForm" class="btTxt submit" type="submit" value="Crop and Save" />
</li>
</ul>
<input type="text" id="x" name="x" />
<input type="text" id="y" name="y" />
<input type="text" id="w" name="w" />
<input type="text" id="h" name="h" />
<input type="text" id="oring_w" name="oring_w" />
<input type="text" id="oring_h" name="oring_h" />
</form>
</div>
<div class="cleaner">
</div>
</div>
<div class="cleaner">
</div>
</div>
<!-- end main content -->
请帮助我....
推荐答案
它不起作用，因为您是通过ajax调用获取图像的.当您在document.ready上调用jcrop函数时，该图像不存在.在DOM中添加图像后，需要将jcrop代码放入ajax调用的成功函数中.应该是这样的(未经测试):
It doesn't work because you get your image via ajax call. When you call the jcrop function on document.ready the image doesn't exist. You need to put the jcrop code in the success function of the ajax call, after you add the image in DOM. Should be something like this (not tested):
$.ajaxFileUpload({
url: '<?php echo site_url()?>/upload/do_upload',
secureuri: false,
fileElementId: 'fileToUpload',
dataType: 'json',
success: function(data, status){
if (typeof(data.error) != 'undefined') {
if (data.error != '') {
$("#image_upload").html(data.error);
$("#image_upload").fadeIn("slow");
}
else {
$("#image_upload").html("<img src='" + data.path + "' width=\"460\" id=\"cropbox\" alt=\"cropbox\" />");//it is important to add the jcrop code after this line
$("#image_upload").fadeIn("slow");
$("#orig_h").val(data.width);
$("#orig_w").val(data.height);
$('#cropbox').Jcrop({
aspectRatio: 1,
setSelect: [0, 0, $("#oring_w").val(), $("#oring_h").val()],
onSelect: updateCoords,
onChange: updateCoords
});
}
}
},
error: function(data, status, e){
$("#image_upload").html(e);
$("#image_upload").fadeIn("slow");
}
})
这篇关于在Ajax上传中实现JCrop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！
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