Laravel 5.6.27 - 如何制作自定义表格宏？

First of all, I'm very new to Laravel.

At the moment, I'm trying to make custom Macros for forms in Laravel 5.6.27

This is what I have:

app/Services/Macros.php

<?php namespace App\Services;

use Collective\Html\FormBuilder;

class Macros extends FormBuilder {
  public function selectState($name, $selected = null, $options = array())
  {
    $list = [
      '' => 'Select One...',
      'AL' => 'Alabama',
      'AK' => 'Alaska',
      'AZ' => 'Arizona',
      'AR' => 'Arkansas',
      'CA' => 'California',
      'CO' => 'Colorado',
      'CT' => 'Connecticut',
      'DE' => 'Delaware',
      'DC' => 'District of Columbia',
      'FL' => 'Florida',
      'GA' => 'Georgia',
      'HI' => 'Hawaii',
      'ID' => 'Idaho',
      'IL' => 'Illinois',
      'IN' => 'Indiana',
      'IA' => 'Iowa',
      'KS' => 'Kansas',
      'KY' => 'Kentucky',
      'LA' => 'Louisiana',
      'ME' => 'Maine',
      'MD' => 'Maryland',
      'MA' => 'Massachusetts',
      'MI' => 'Michigan',
      'MN' => 'Minnesota',
      'MS' => 'Mississippi',
      'MO' => 'Missouri',
      'MT' => 'Montana',
      'NE' => 'Nebraska',
      'NV' => 'Nevada',
      'NH' => 'New Hampshire',
      'NJ' => 'New Jersey',
      'NM' => 'New Mexico',
      'NY' => 'New York',
      'NC' => 'North Carolina',
      'ND' => 'North Dakota',
      'OH' => 'Ohio',
      'OK' => 'Oklahoma',
      'OR' => 'Oregon',
      'PA' => 'Pennsylvania',
      'RI' => 'Rhode Island',
      'SC' => 'South Carolina',
      'SD' => 'South Dakota',
      'TN' => 'Tennessee',
      'TX' => 'Texas',
      'UT' => 'Utah',
      'VT' => 'Vermont',
      'VA' => 'Virginia',
      'WA' => 'Washington',
      'WV' => 'West Virginia',
      'WI' => 'Wisconsin',
      'WY' => 'Wyoming'
    ];

    return $this->select($name, $list, $selected, $options);
  }
}

app/Providers/MacroServiceProvider.php

<?php namespace App\Providers;

use Collective\Html\HtmlServiceProvider;

class MacroServiceProvider extends HtmlServiceProvider {

  public function register()
  {
    parent::register();

    require base_path() . '/app/Services/Macros.php';
  }
}

I also added in config/app.php

Collective\Html\HtmlServiceProvider::class,
App\Providers\MacroServiceProvider::class,

Then, in my view I put out this code:

{{ Form::selectState() }}

I get the following error:

"Method selectState does not exist. (View: C:\MAMP\htdocs\craftoesources\views\contact.blade.php)"

I have no idea what I'm doing wrong. Seems like I can't find the selectState function that I have made. I had tried a lot of things, but I don't have a lot of knowledge about Laravel. Banging my head at the wall over it.

Can someone explain to me how Macros work, and in specific the Form Macros?

Thanks.

Don't override the library class. You will have a very hard time getting that to work.

FormBuilder uses the Macroable trait so to define macros you can do:

app/Providers/MacroServiceProvider.php

public function register()
{
   parent::register();
   FormBuilder::macro('selectState', function ($name, $selected = null, $options = array())
  {
    $list = [
      '' => 'Select One...',
      'AL' => 'Alabama',
      'AK' => 'Alaska',
      'AZ' => 'Arizona',
      'AR' => 'Arkansas',
      'CA' => 'California',
      'CO' => 'Colorado',
      'CT' => 'Connecticut',
      'DE' => 'Delaware',
      'DC' => 'District of Columbia',
      'FL' => 'Florida',
      'GA' => 'Georgia',
      'HI' => 'Hawaii',
      'ID' => 'Idaho',
      'IL' => 'Illinois',
      'IN' => 'Indiana',
      'IA' => 'Iowa',
      'KS' => 'Kansas',
      'KY' => 'Kentucky',
      'LA' => 'Louisiana',
      'ME' => 'Maine',
      'MD' => 'Maryland',
      'MA' => 'Massachusetts',
      'MI' => 'Michigan',
      'MN' => 'Minnesota',
      'MS' => 'Mississippi',
      'MO' => 'Missouri',
      'MT' => 'Montana',
      'NE' => 'Nebraska',
      'NV' => 'Nevada',
      'NH' => 'New Hampshire',
      'NJ' => 'New Jersey',
      'NM' => 'New Mexico',
      'NY' => 'New York',
      'NC' => 'North Carolina',
      'ND' => 'North Dakota',
      'OH' => 'Ohio',
      'OK' => 'Oklahoma',
      'OR' => 'Oregon',
      'PA' => 'Pennsylvania',
      'RI' => 'Rhode Island',
      'SC' => 'South Carolina',
      'SD' => 'South Dakota',
      'TN' => 'Tennessee',
      'TX' => 'Texas',
      'UT' => 'Utah',
      'VT' => 'Vermont',
      'VA' => 'Virginia',
      'WA' => 'Washington',
      'WV' => 'West Virginia',
      'WI' => 'Wisconsin',
      'WY' => 'Wyoming'
    ];

    return $this->select($name, $list, $selected, $options);
  });

What the Macroable trait does is essentially just hold an array of extra functions (macros) and call them via the __call or __callStatic magic method.

Of course this only works for methods not already defined on the base class