Dcat admin自带的table 工具只能传二维数组，不能够自定义列的宽度，渲染出来的表格不是很好看，所以根据源码，简单改了一下，直接上代码：

自定义table工具类继承 Dcat\Admin\Widgets\Table:

namespace App\Widgets;

use Dcat\Admin\Widgets\Table as BaseTable;

class Table extends BaseTable
{
    protected $view = 'widgets.table';
}

就是这么简单，只是重新声明一下模板地址

创建模板

// resources/views/widgets/table.blade.php
<table>
    <thead>
    <tr>
        @foreach($headers as $header)
            <th>{{ $header }}</th>
        @endforeach
    </tr>
    </thead>
    <tbody>
    @foreach($rows as $row)
        <tr>
            @foreach($row as $item)
                @if(is_string($item))
                    <td>{!! $item !!}</td>
                @else
                    <td>attributes() !!}>{!! $item->content() !!}</td>
                @endif
            @endforeach
        </tr>
    @endforeach
    </tbody>
</table>

创建Column模型

<?php namespace App\Layouts;

class Column
{
    protected $content = '';

    protected $class = [];

    protected $width = 0;


    /**
     * Column constructor.
     * @param string $content
     */
    public function __construct(string $content = '')
    {
        $this->content = $content;
    }

    /**
     * @param mixed ...$params
     *
     * @return static
     */
    public static function make(...$params)
    {
        return new static(...$params);
    }

    /**
     * 设置宽度
     * 
     * @param int $width
     * @return $this
     */
    public function width($width = 0)
    {
        $this->width = $width;
        return $this;
    }

    /**
     * 设置类名
     * 
     * @param string|array $class
     * @return $this
     */
    public function class($class = [])
    {
        if (is_array($class)) {
            $this->class = array_merge($class, $this->class);
        } else {
            $this->class[] = $class;
        }
        return $this;
    }

    /**
     * 添加label标签
     * 
     * @param $content
     * @param string $class
     * @return $this
     */
    public function label($content, $class = 'default')
    {
        $this->content .= sprintf(' <span class="label bg-%s">%s</span>', $class, $content);
        return $this;
    }

    /**
     * 获取内容
     * 
     * @return string
     */
    public function content()
    {
        return $this->content;
    }

    /**
     * 获取列属性
     * 
     * @return string
     */
    public function attributes()
    {
        $attributes = '';

        if (empty($this->class)) {
            $attributes .= sprintf('class="%s" ', implode(' ', $this->class));
        }
        if ($this->width) {
            $attributes .= sprintf('width="%s" ', $this->width);
        }

        return $attributes;
    }
}

控制器中使用

use App\Layouts\Column as TableColumn;
use App\Widgets\Table;

.
.
.

return Card::make('系统信息', function () {
	return new Table([
	[TableColumn::make('运行环境')->width(120), request()->server('SERVER_SOFTWARE')],
	['是否可读',TableColumn::make()->label('可读', 'primary')->label('不可写', 'danger')],
	]);
        });

渲染效果