Laravel：__construct（）必须是Dompdf \ Dompdf的实例

Question

它尝试了此代码，但无法正常工作。问题是什么？我该如何解决？

--fork-point

  

传递给Barryvdh \ DomPDF \ PDF :: __ construct（）的参数1必须是       Dompdf \ Dompdf的实例，App \ Invoice的实例，在       C：\ xampp \ htdocs \ shopping-cart \ app \ Http \ Controllers \ InvoiceController.php

Answer 1

您可以直接通过以下方式使用立面：

use use Barryvdh\DomPDF\Facade as PDF;
...
public function PDF(Invoice $invoice)
{
    $items = unserialize($invoice->items);
    $fileName =$invoice->invoice_code;
    $pdf = PDF::loadView('invoice.pdf', compact('invoice', 'items'));
    return $pdf->stream($fileName . '.pdf');
}

of以别名添加到config.php后：

config.php

'aliases' => [
    ...
    'PDF' => Barryvdh\DomPDF\Facade::class,
],

控制器

//no use needed
...
public function PDF(Invoice $invoice)
{
    $items = unserialize($invoice->items);
    $fileName =$invoice->invoice_code;
    $pdf = \PDF::loadView('invoice.pdf', compact('invoice', 'items'));
    return $pdf->stream($fileName . '.pdf');
}