这是当我向控制器发送ajax请求以裁剪并调整大小时，而是调整大小但我的图像变黑。我甚至尝试添加标题，以便我的浏览器能够理解它是一种有效的图像文件格式。我失踪的地方？
**My ajax call to controller**
<script type="text/javascript">
jQuery(document).ready(function(){
jQuery('#change-pic').on('click', function(e){
jQuery('#changePic').show();
jQuery('#change-pic').hide();
});
jQuery('#photoimg').on('change', function()
{
jQuery("#preview-avatar-profile").html('');
jQuery("#preview-avatar-profile").html('Uploading....');
jQuery("#cropimage").ajaxForm(
{
target: '#preview-avatar-profile',
success: function() {
jQuery('img#photo').imgAreaSelect({
aspectRatio: '1:1',
onSelectEnd: getSizes,
});
jQuery('#image_name').val(jQuery('#photo').attr('file-name'));
}
}).submit();
});
jQuery('#btn-crop').on('click', function(e){
e.preventDefault();
params = {
//targetUrl: 'profile.php?action=save',
targetUrl: 'http://172.16.0.60/cakephp/users/croppedimage',
//action: 'save',
x_axis: jQuery('#hdn-x1-axis').val(),
y_axis : jQuery('#hdn-y1-axis').val(),
x2_axis: jQuery('#hdn-x2-axis').val(),
y2_axis : jQuery('#hdn-y2-axis').val(),
thumb_width : jQuery('#hdn-thumb-width').val(),
thumb_height:jQuery('#hdn-thumb-height').val()
};
saveCropImage(params);
});
function getSizes(img, obj)
{
var x_axis = obj.x1;
var x2_axis = obj.x2;
var y_axis = obj.y1;
var y2_axis = obj.y2;
var thumb_width = obj.width;
var thumb_height = obj.height;
if(thumb_width > 0)
{
jQuery('#hdn-x1-axis').val(x_axis);
jQuery('#hdn-y1-axis').val(y_axis);
jQuery('#hdn-x2-axis').val(x2_axis);
jQuery('#hdn-y2-axis').val(y2_axis);
jQuery('#hdn-thumb-width').val(thumb_width);
jQuery('#hdn-thumb-height').val(thumb_height);
}
else
alert("Please select portion..!");
}
function saveCropImage(params) {
jQuery.ajax({
url: params['targetUrl'],
cache: false,
dataType: "html",
data: {
action: params['action'],
id: jQuery('#hdn-profile-id').val(),
t: 'ajax',
w1:params['thumb_width'],
x1:params['x_axis'],
h1:params['thumb_height'],
y1:params['y_axis'],
x2:params['x2_axis'],
y2:params['y2_axis'],
image_name :jQuery('#image_name').val()
},
type: 'Post',
// async:false,
success: function (response) {
jQuery('#changePic').hide();
jQuery('#change-pic').show();
jQuery(".imgareaselect-border1,.imgareaselect-border2,.imgareaselect-border3,.imgareaselect-border4,.imgareaselect-border2,.imgareaselect-outer").css('display', 'none');
jQuery("#avatar-edit-img").attr('src', response);
jQuery("#preview-avatar-profile").html('');
jQuery("#photoimg").val('');
},
error: function (xhr, ajaxOptions, thrownError) {
alert('status Code:' + xhr.status + 'Error Message :' + thrownError);
}
});
}
});
</script>
这是我上传图像并进行预览时的第一个。
public function wall()
{
$post = isset($_POST) ? $_POST: array();
$max_width = "500";
$userId = isset($post['hdn-profile-id']) ? intval($post['hdn-profile-id']) : 0;
// $path = 'http://172.16.0.60/cakephp/webroot/img/tmp';
$path = WWW_ROOT.'img/tmp/' ;
$valid_formats = array("jpg", "png", "gif", "bmp","jpeg");
$name = $_FILES['photoimg']['name'];
$size = $_FILES['photoimg']['size'];
if(strlen($name))
{
list($txt, $ext) = explode(".", $name);
if(in_array($ext,$valid_formats))
{
if($size<(1024*1024)) // Image size max 1 MB
{
$actual_image_name = 'avatar' .'_'.$userId .'.'.$ext;
$filePath = $path .'/'.$actual_image_name;
$tmp = $_FILES['photoimg']['tmp_name'];
if(move_uploaded_file($tmp, $filePath))
{
// /$this->setPassword($this->request->data['password']);
$width = $this->getWidth($filePath);
$height = $this->getHeight($filePath);
//Scale the image if it is greater than the width set above
if ($width > $max_width)
{
$scale = $max_width/$width;
$uploaded = $this->resizeImage($filePath,$width,$height,$scale);
}
else
{
$scale = 1;
$uploaded = $this->resizeImage($filePath,$width,$height,$scale);
}
/*
echo "<img id='photo' file-name='".$actual_image_name."' class='' src='".'file://'.$filePath.'?'.time()."' class='preview'/>";
*/
$mypath = '/cakephp/img/tmp/'.$actual_image_name;
echo "<img id='photo' file-name='".$actual_image_name."' class='' src='".$mypath."' class='preview'/>";
}
else
echo "failed";
}
else
echo "Image file size max 1 MB";
}
else
echo "Invalid file format..";
}
else
echo "Please select image..!";
exit;
}
我的控制器代码，其中我使用函数imagecopyresampled（）但idk我错了。？
任何解决方案
public function croppedimage()
{
header('Content-Type: image/png');
$post = isset($_POST) ? $_POST: array();
$userId = isset($post['id']) ? intval($post['id']) : 0;
//$path ='\images\uploads\tmp';
$path = WWW_ROOT.'img/tmp/uploads/' ;
$t_width = 300; // Maximum thumbnail width
$t_height = 300; // Maximum thumbnail height
if(isset($_POST['t']) and $_POST['t'] == "ajax")
{
extract($_POST);
//$img = get_user_meta($userId, 'user_avatar', true);
//$filePath = $path .'/'.$actual_image_name;
$imagePath = $path.$_POST['image_name'];
$ratio = ($t_width/$w1);
$nw = ceil($w1 * $ratio);
$nh = ceil($h1 * $ratio);
$nimg = imagecreatetruecolor($nw,$nh);
$im_src = imagecreatefromjpeg($imagePath);
imagecopyresampled($nimg,$im_src,0,0,$x1,$y1,$nw,$nh,$w1,$h1);
imagejpeg($nimg,$imagePath,90);
}
echo $imagePath.'?'.time();;
exit(0);
die();
}