Magento 2 invoice/shipment PDF中文乱码及内容过长未自动换行问题

PDF中文乱码

1、添加支持的中文字体（SourceHanSans-Normal.ttf）
    将字体放到 lib/internal/GnuFreeFont/ 目录下即可

2、重写\Magento\Sales\Model\Order\Pdf\Invoice及 Magento\Sales\Model\Order\Pdf\Shipment
（注：抽象类 Magento\Sales\Model\Order\Pdf\AbstractPdf 不支持重写，所以需要重写继承了它的子类）
    1）di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <!--Pdf support chinese fonts-->
    <preference for="Magento\Sales\Model\Order\Pdf\Invoice" type="Vendor_name\Module_name\Model\Order\Pdf\Invoice" />
    <preference for="Magento\Sales\Model\Order\Pdf\Shipment" type="Vendor_name\Module_name\Model\Order\Pdf\Shipment" />
</config>

    2）Vendor_name\Module_name\Model\Order\Pdf\Invoice.php

<?php
namespace Vendor_name\Module_name\Model\Order\Pdf;

class Invoice extends \Magento\Sales\Model\Order\Pdf\Invoice
{
    /**
     * Set font as regular
     *
     * @param  \Zend_Pdf_Page $object
     * @param  int $size
     * @return \Zend_Pdf_Resource_Font
     */
    protected function _setFontRegular($object, $size = 7)
    {
        $font = \Zend_Pdf_Font::fontWithPath(
            $this->_rootDirectory->getAbsolutePath('lib/internal/GnuFreeFont/SourceHanSans-Normal.ttf')
        );
        $object->setFont($font, $size);
        return $font;
    }

    /**
     * Set font as bold
     *
     * @param  \Zend_Pdf_Page $object
     * @param  int $size
     * @return \Zend_Pdf_Resource_Font
     */
    protected function _setFontBold($object, $size = 7)
    {
        $font = \Zend_Pdf_Font::fontWithPath(
            $this->_rootDirectory->getAbsolutePath('lib/internal/GnuFreeFont/SourceHanSans-Normal.ttf')
        );
        $object->setFont($font, $size);
        return $font;
    }

    /**
     * Set font as italic
     *
     * @param  \Zend_Pdf_Page $object
     * @param  int $size
     * @return \Zend_Pdf_Resource_Font
     */
    protected function _setFontItalic($object, $size = 7)
    {
        $font = \Zend_Pdf_Font::fontWithPath(
            $this->_rootDirectory->getAbsolutePath('lib/internal/GnuFreeFont/SourceHanSans-Normal.ttf')
        );
        $object->setFont($font, $size);
        return $font;
    }
}

Vendor_name\Module_name\Model\Order\Pdf\Shipment.php 同上；

---

PDF内容（products, address）过长未自动换行

1、products 过长需重写 Magento\Sales\Model\Order\Pdf\Items\Invoice\DefaultInvoice 下 draw() 方法；
2、address 过长需重写 Magento\Sales\Model\Order\Pdf\AbstractPdf _formatAddress() 方法；
注：以上2个function中 split() 的第二个参数即用于设置换行长度，将其修改为自己需要的长度即可

---