如何在Symfony中将服务作为参数注入？

namespace App\Controller;

use App\Service\SomeService;

class MyController
{
    private $someService;

    public function __construct(SomeService $someService)
    {
        $this->someService = $someService;
    }

    public function index()
    {
        // 使用注入的服务
        $result = $this->someService->doSomething();

        // ...
    }
}

namespace App\Controller;

use App\Service\SomeService;

class MyController
{
    private $someService;

    public function setSomeService(SomeService $someService)
    {
        $this->someService = $someService;
    }

    public function index()
    {
        // 使用注入的服务
        $result = $this->someService->doSomething();

        // ...
    }
}