我正在尝试裁剪图像并将裁剪后的数据发送到服务器端。我正在使用imgareaselect插件。我获取所选区域的坐标，但无法裁剪图像。互联网上提供的所有解决方案都是使用css预览裁剪后的图像。但是我如何获取裁剪后的数据呢?无需预览裁剪后的图像。我的代码如下：
cropw = $('#cropimg').imgAreaSelect({
maxWidth: 300, maxHeight: 300,
aspectRatio: '1:1',
instance: true,
handles: true,
onSelectEnd: function (img, selection) {
x1 = selection.x1;
y1 = selection.y1;
x2 = selection.x2;
y2 = selection.y2;
}
});
嘿@ Shahbaz，我正在尝试使用cropper.js为您提供解决方案。
这是您可以做的
//link the js files
<head>
<script src="jquery.js"></script> // optional
<link href="cropper.min.css" rel="stylesheet">
<script src="cropper.min.js"></script>
</head>
正文
<input type="file" name="image" id="image" onchange="readURL(this);"/>
<div class="image_container">
<img id="blah" src="#" alt="your image" />
</div>
<div id="cropped_result"></div> // Cropped image to display (only if u want)
<button id="crop_button">Crop</button> // Will trigger crop event
Javascript
->Javascript
<script type="text/javascript" defer>
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#blah').attr('src', e.target.result)
};
reader.readAsDataURL(input.files[0]);
setTimeout(initCropper, 1000);
}
}
function initCropper(){
var image = document.getElementById('blah');
var cropper = new Cropper(image, {
aspectRatio: 1 / 1,
crop: function(e) {
console.log(e.detail.x);
console.log(e.detail.y);
}
});
// On crop button clicked
document.getElementById('crop_button').addEventListener('click', function(){
var imgurl = cropper.getCroppedCanvas().toDataURL();
var img = document.createElement("img");
img.src = imgurl;
document.getElementById("cropped_result").appendChild(img);
/* ---------------- SEND IMAGE TO THE SERVER-------------------------
cropper.getCroppedCanvas().toBlob(function (blob) {
var formData = new FormData();
formData.append('croppedImage', blob);
// Use `jQuery.ajax` method
$.ajax('/path/to/upload', {
method: "POST",
data: formData,
processData: false,
contentType: false,
success: function () {
console.log('Upload success');
},
error: function () {
console.log('Upload error');
}
});
});
----------------------------------------------------*/
})
}
</script>
希望这能有所帮助。谢谢。
根据被接受的答案，我添加了这个。如果有人正在使用cropper的jquery包装器，则需要注意。
let ICropper = (function($) {
let $cropperCanvasImage = $('#cropper-canvas-image');
return {
readUrl,
cropImage
}
function readUrl(input) {
if (input.files && input.files[0]) {
let reader = new FileReader();
reader.onload = function(e) {
$cropperCanvasImage.attr('src', e.target.result)
};
reader.readAsDataURL(input.files[0]);
setTimeout(initCropper, 1000);
}
}
function initCropper() {
$cropperCanvasImage.cropper({
aspectRatio: 1 / 1
});
}
function cropImage() {
let imgUrl = $cropperCanvasImage.data('cropper').getCroppedCanvas().toDataURL();
let img = document.createElement("img");
img.src = imgUrl;
$("#cropped-result").append(img);
}
})(jQuery)<script src="https://cdnjs.cloudflare.com/ajax/libs/cropperjs/1.4.1/cropper.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script name="jquery-croper-script">
!function(e,r){"object"==typeof exports&&"undefined"!=typeof module?r(require("jquery"),require("cropperjs")):"function"==typeof define&&define.amd?define(["jquery","cropperjs"],r):r(e.jQuery,e.Cropper)}(this,function(c,s){"use strict";if(c=c&&c.hasOwnProperty("default")?c.default:c,s=s&&s.hasOwnProperty("default")?s.default:s,c.fn){var e=c.fn.cropper,d="cropper";c.fn.cropper=function(p){for(var e=arguments.length,a=Array(1<e?e-1:0),r=1;r<e;r++)a[r-1]=arguments[r];var u=void 0;return this.each(function(e,r){var t=c(r),n="destroy"===p,o=t.data(d);if(!o){if(n)return;var f=c.extend({},t.data(),c.isPlainObject(p)&&p);o=new s(r,f),t.data(d,o)}if("string"==typeof p){var i=o[p];c.isFunction(i)&&((u=i.apply(o,a))===o&&(u=void 0),n&&t.removeData(d))}}),void 0!==u?u:this},c.fn.cropper.Constructor=s,c.fn.cropper.setDefaults=s.setDefaults,c.fn.cropper.noConflict=function(){return c.fn.cropper=e,this}}});
</script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/cropperjs/1.4.1/cropper.min.css" />
<input type="file" name="source-image" id="sourceImage" onchange="ICropper.readUrl(this);" />
<div class="image-container">
<img id="cropper-canvas-image" src="#" alt="your image" />
</div>
<div id="cropped-result"></div>
<button onclick="ICropper.cropImage(this)">Crop</button>你尝试过使用Jquery的裁剪插件吗，比如：
https://fengyuanchen.github.io/cropper/
你需要在页面中导入脚本：
<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
$targ_w = $targ_h = 150;
$jpeg_quality = 90;
$src = 'demo_files/pool.jpg';
$img_r = imagecreatefromjpeg($src);
$dst_r = ImageCreateTrueColor( $targ_w, $targ_h );
imagecopyresampled($dst_r,$img_r,0,0,$_POST['x'],$_POST['y'],
$targ_w,$targ_h,$_POST['w'],$_POST['h']);
header('Content-type: image/jpeg');
imagejpeg($dst_r,null,$jpeg_quality);
exit;
}
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="http://deepliquid.com/Jcrop/js/jquery.Jcrop.min.js"></script>
<script src="../js/jquery.Jcrop.js"></script>
<link rel="stylesheet" href="../css/jquery.Jcrop.css" type="text/css" />
<link rel="stylesheet" href="demo_files/demos.css" type="text/css" />
<script language="Javascript">
$(function(){
$('#cropbox').Jcrop({
aspectRatio: 1,
onSelect: updateCoords
});
});
function updateCoords(c)
{
$('#x').val(c.x);
$('#y').val(c.y);
$('#w').val(c.w);
$('#h').val(c.h);
};
function checkCoords()
{
if (parseInt($('#w').val())) return true;
alert('Selecione a área para recorte.');
return false;
};
</script>
</head>
<body>
<div id="outer">
<div class="jcExample">
<div class="article">
<h1>Crop jQuery</h1>
<img src="demo_files/pool.jpg" id="cropbox" />
<form action="crop.php" method="post" onsubmit="return checkCoords();">
<input type="hidden" id="x" name="x" />
<input type="hidden" id="y" name="y" />
<input type="hidden" id="w" name="w" />
<input type="hidden" id="h" name="h" />
<input type="submit" value="Crop Image" />
</form>
</div>
</div>
</div>
</body>
</html>