ajax form - problemi su iphone e ipad

[felice_gatt]

salve ragazzi... piccolo problema da risolvere, ho scaricato uno script che esegue l'upload di immagini con barra di progresso... ora, il problema è che l'upload sul pc si esegue perfettamente mentre sull'ipad e sull'iphone ( e non ho provato altri dispositivi mobile ) a memoria svuotata ne caricare una e se carico altre mi visualizza sempre la prima non eseguendo l'upload... come risolvo ?
questo è il form

<div id="output"></div>
<div class="buttonphoto">
<div id="statustxt">Select photo</div >
<div id="progressbox">
<div id="progressbar"></div >
</div>
<div class="fomrpho">
<form action="processupload.php" method="post" enctype="multipart/form-data" id="UploadForm">
<input name="ImageFile" type="file" />
</form>
</div>
</div>

questo lo script che esegue l'ajaxForm

$(document).ready(function() {
	 
	 $("input[name='ImageFile']").change(function(){
    	$('#UploadForm').submit();
		}); 
		
		//elements
		var progressbox 	= $('#progressbox');
		var progressbar 	= $('#progressbar');
		var statustxt 		= $('#statustxt');
		var myform 			= $("#UploadForm");
		var output 			= $("#output");
		var completed 		= '0%';

		
				$(myform).ajaxForm({
					beforeSend: function() { //brfore sending form
						statustxt.empty();
						progressbox.show(); //show progressbar
						progressbar.width(completed); //initial value 0% of progressbar
						
					},
					uploadProgress: function(event, position, total, percentComplete) { //on progress
						progressbar.width(percentComplete + '%') //update progressbar percent complete
						

					
						},
					complete: function(response) { // on complete
					
						output.html(response.responseText); //update element with received data
						myform.resetForm();  // reset form
						progressbox.hide(); // hide progressbar
						statustxt.html('Select photo'); //set status text
						var lacacca = output.find('img').attr('src');
						$('#mask-a').attr('onclick', 'closeEverything("' + lacacca + '");');
						$('#postit').attr('action', 'photo.php?url=' + lacacca);
						setTimeout(function() {
    					$('#wrap').masonry( 'reload');
						}, 500);
						
						
					}
					
			});
			
			return false;
			
			
			
			
			
        });

questa la pagina dove si esegue l'upload

<noscript>
<div align="center">[url="index.php"]Go Back To Upload Form[/url]</div>
</noscript>

<?php


if(isset($_POST)) 
{    
    //settaggi

    $ThumbSquareSize         = 600; 
    $BigImageMaxSize         = 640; 
    $ThumbPrefix            = "temp_"; 
    $DestinationDirectory    = 'file_temp/'; 
    $Quality                 = 90;

    if(!isset($_FILES['ImageFile']) || !is_uploaded_file($_FILES['ImageFile']['tmp_name']))
    {
            die('Something went wrong with Upload!'); 
    }
    
    //verifico formato
    
    $RandomNumber     = rand(0, 9999999999); 

    $ImageName         = str_replace(' ','-',strtolower($_FILES['ImageFile']['name'])); 
    $ImageSize         = $_FILES['ImageFile']['size']; 
    $TempSrc         = $_FILES['ImageFile']['tmp_name']; 
    $ImageType         = $_FILES['ImageFile']['type']; 

    switch(strtolower($ImageType))
    {
        case 'image/png':
            $CreatedImage =  imagecreatefrompng($_FILES['ImageFile']['tmp_name']);
            break;
        case 'image/gif':
            $CreatedImage =  imagecreatefromgif($_FILES['ImageFile']['tmp_name']);
            break;            
        case 'image/jpeg':
        case 'image/pjpeg':
            $CreatedImage = imagecreatefromjpeg($_FILES['ImageFile']['tmp_name']);
            break;
        default:
            die('Unsupported File!'); 
    }
    
    //recupero informazioni
    
    list($CurWidth,$CurHeight)=getimagesize($TempSrc);

    $ImageExt = substr($ImageName, strrpos($ImageName, '.'));
      $ImageExt = str_replace('.','',$ImageExt);

    $ImageName         = preg_replace("/\\.[^.\\s]{3,4}$/", "", $ImageName); 

    $NewImageName = $RandomNumber.'.'.$ImageExt;

    $thumb_DestRandImageName     = $DestinationDirectory.$ThumbPrefix.$NewImageName; 
    $DestRandImageName             = $DestinationDirectory.$NewImageName; 
    
    //creo immagine

    if(resizeImage($CurWidth,$CurHeight,$BigImageMaxSize,$DestRandImageName,$CreatedImage,$Quality,$ImageType))
    {
        
        if(!cropImage($CurWidth,$CurHeight,$ThumbSquareSize,$thumb_DestRandImageName,$CreatedImage,$Quality,$ImageType))
            {
                echo 'Error Creating thumbnail';
            }

        list($ResizedWidth,$ResizedHeight)=getimagesize($DestRandImageName); ?>

        <div class="thumbphoto" onclick="stampa('<? echo $DestRandImageName ?>');">
        [img]file_temp/<? echo $ThumbPrefix.$NewImageName ?>[/img]
        </div>
        
        <?
        
    }else{
        die('Resize Error'); 
    }

}

//resize

function resizeImage($CurWidth,$CurHeight,$MaxSize,$DestFolder,$SrcImage,$Quality,$ImageType)
{

    if($CurWidth <= 0 || $CurHeight <= 0) 
    {
        return false;
    }

    $ImageScale          = min($MaxSize/$CurWidth, $MaxSize/$CurHeight); 
    $NewWidth              = ceil($ImageScale*$CurWidth);
    $NewHeight             = ceil($ImageScale*$CurHeight);
    
    if($CurWidth < $NewWidth || $CurHeight < $NewHeight)
    {
        $NewWidth = $CurWidth;
        $NewHeight = $CurHeight;
    }
    $NewCanves     = imagecreatetruecolor($NewWidth, $NewHeight);

    if(imagecopyresampled($NewCanves, $SrcImage,0, 0, 0, 0, $NewWidth, $NewHeight, $CurWidth, $CurHeight))
    {
        switch(strtolower($ImageType))
        {
            case 'image/png':
                imagepng($NewCanves,$DestFolder);
                break;
            case 'image/gif':
                imagegif($NewCanves,$DestFolder);
                break;            
            case 'image/jpeg':
            case 'image/pjpeg':
                imagejpeg($NewCanves,$DestFolder,$Quality);
                break;
            default:
                return false;
        }
        
    if(is_resource($NewCanves)) {imagedestroy($NewCanves);} 
    return true;
    }

}

//crop
function cropImage($CurWidth,$CurHeight,$iSize,$DestFolder,$SrcImage,$Quality,$ImageType)
{     

    if($CurWidth <= 0 || $CurHeight <= 0) 
    {
        return false;
    }
    
    if($CurWidth>$CurHeight)
    {
        $y_offset = 0;
        $x_offset = ($CurWidth - $CurHeight) / 2;
        $square_size     = $CurWidth - ($x_offset * 2);
    }else{
        $x_offset = 0;
        $y_offset = ($CurHeight - $CurWidth) / 2;
        $square_size = $CurHeight - ($y_offset * 2);
    }
    
    $NewCanves     = imagecreatetruecolor($iSize, $iSize);    
    if(imagecopyresampled($NewCanves, $SrcImage,0, 0, $x_offset, $y_offset, $iSize, $iSize, $square_size, $square_size))
    {
        switch(strtolower($ImageType))
        {
            case 'image/png':
                imagepng($NewCanves,$DestFolder);
                break;
            case 'image/gif':
                imagegif($NewCanves,$DestFolder);
                break;            
            case 'image/jpeg':
            case 'image/pjpeg':
                imagejpeg($NewCanves,$DestFolder,$Quality);
                break;
            default:
                return false;
        }

    if(is_resource($NewCanves)) {imagedestroy($NewCanves);} 
    return true;
    }
      
}

Ripeto sui pc funziona, su iphone e ipad no

[felice_gatt]

risolto da solo in ogni caso pubblico la soluzione


$.ajaxSetup({
headers: { "cache-control": "no-cache" }
});

[cavicchiandrea]

Io ho testato questo su Ipad 3 e il progressbar funziona regolarmente, mentre su samsung s3 esegue upload ma non mostra il progressbar in avanzamento, se non è lo stesso script usa questo