laravel 7组件未将公共变量传递给模板

Question

php artisan make：component city

app / View / Components / city.php

namespace App\View\Components;

use Illuminate\View\Component;

class city extends Component
{
    /**
     * Create a new component instance.
     *
     * @return void
     */
    public $city;

    public function __construct()
    {
        $this->city = 'city';
    }

    /**
     * Get the view / contents that represent the component.
     *
     * @return \Illuminate\View\View|string
     */
    public function render()
    {
        return view('components.city');
    }
}

resources / views / components / city.blade.php

{{ $city }}

routes / web.php

Route::view('/component-city', 'component-example');

resources / views / component-examle.blade.php

<x-city/>

Laravel说：“未定义变量：城市”

我专门删除了“ app / View / Components / city.php”文件中的代码，但是显示了组件的内容。好像Laravel没有使用文件app / View / Components / city.php