Question

我使用以下代码通过pdf文件循环图像，它仅对第一个pdf页面正常工作，直到第二页每页打印一个图像。这是为什么？

$this->load->helper('directory'); 
$dir = "assets/barcode/"; 
$map = directory_map($dir);

$this->load->library("Pdf");
$pdf = new Pdf('P', 'mm', 'A4', false, 'UTF-8', true);
$pdf->SetFont('helvetica', '', 12, '', true);
$pdf->SetHeaderMargin(30);
$pdf->SetTopMargin(20);
$pdf->setFooterMargin(20);
$pdf->SetAutoPageBreak(true,0);


$pdf->AddPage();

$x = 0;
$y = 0;
foreach($map as $k) {

    $pdfimage = "assets/barcode/".$k;
    $pdfimgname = $k;
    $pdf->Image($pdfimage, 30, 25 + $x, 0, 0, '', '', '', false, 9);        

    $pdf->SetXY(70, 30 + $y);
    $pdf->writeHTML($pdfimgname,100 , 30, 0, 0, '', '', '', false, 9);

    $x = $x + 30;
    $y = $y + 30;

}           
$pdf->Output();

Answer 1

我的要求是创建生成的QrCodes的pdf。我写这个逻辑。希望这会对你有所帮助。

/**
 * @param {array} $generated : This is array of qr code images
 */
function tcpdfun($generated)
{
    set_time_limit(0);
    $your_width = 304.8;
    $your_height = 457.2;
    $custom_layout = array($your_width, $your_height);

    $pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, $custom_layout, true, 'UTF-8', false);

    $pdf->SetMargins(0, 0, PDF_MARGIN_RIGHT);
    $pdf->SetAutoPageBreak(TRUE, 0);
    $pdf->SetPrintHeader(false);
    $pdf->SetPrintFooter(false);
    $pdf->SetFont('helvetica', '', 4);

    $pdf->AddPage();

    $pdf->setJPEGQuality(100);

    $startX = 8.8; // X-axis margin
    $startY = 6.8; // Y-axis margin
    $qrPath = base_url()."qrs/"; // QrCode Images folder
    $imgHW = 25; // Image Height-Width - Square
    $gap = 4; // Gap between two images

    $j = 1;

    for($i=0; $i < count($generated); $i++, $j++)
    {
        $pdf->setXY($startX, $startY); // set XY axis
        $startX = $startX+$imgHW;  // Add image width

        $border = array('LTRB' => array('width' => 0.2, 'cap' => 'butt',
            'join' => 'miter', 'dash' => 0, 'color' => array(190, 190, 190)));  // image border

        $pdf->Image($qrPath.$generated[$i]["qr_code"].'.png', '', '', $imgHW, $imgHW, 'PNG', '', 'T',
                        false, 300, '', false, false, $border, false, false, false);  // image print in pdf

        if($j > 0) { $pdf->setXY($startX - $imgHW + 1.5, $startY+$imgHW); }
        else { $pdf->setXY($startX + 1.5, $startY+$imgHW); }

        $pdf->Write(1, $generated[$i]["qr_code"], '',false, '', false, 0, false, false, 0, 0, '');

        /** I calculate my page size and come to know that I can print only 11 images in a row, 
        so I write the following logic to reset X axis to initial position and add an extra height to Y axis **/

        if($j >= 11)
        {
            $startY = $startY+$imgHW+$gap;
            $startX = 8.8;
            $j = 0;
        }

        /** I calculate my page size and come to know that I can print only 165 images per page, 
        so I write following logic to add new page after 165 images, and reset X-Y axis to initial position on new page. **/

        if( (($i+1)%165) == 0 && $i!=0)
        {
            $pdf->AddPage();
            $startX = 8.8;
            $startY = 6.8;
            $j = 0;
        }
    }

    $file_name = "qrbatch_".date("YmdHis").".pdf";
    //Close and output PDF document
    $pdf->Output($file_name, 'D');
}

我在那里写了很多评论以便更好地理解，但你需要根据你的图像大小要求修改数字方面的逻辑。

用tcpdf循环图像

1 个答案: