// In Model
public $cast = [
    'images' => 'array',
];

// In Migration
public function up()
{
    Schema::create('users', function (Blueprint $table) {
        $table->json('images')->nullable()->comment('多图');
    });
}

// In Nova resource
public function fields(Request $request)
{
    return [      
        \Weiwait\NovaImages\Images::make('图片', 'images')
            ->cropper([
                'autoCrop' => true,
                'fixed' => true,
                'fixedNumber' => [16, 9],
                'enlarge' => 3,
            ]),
    ];
}

由 vue-cropper 支持