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我正在尝试按照教程点上的步骤实现桥接设计模式. I am converting the code from Java to PHP and changing some names.

问题是，当我尝试将具体桥实现类传递给具体类实现接口时，会抛出错误。

我的代码如下：

// LaunchApi.php
interface LaunchApi
{
    public function launch();
}

// RedEngine.php
class RedEngine implements LaunchApi
{
    public function launch()
    {
        echo "The red engine is really fast!!!";
    }
}

// Rocket.php
abstract class Rocket
{
    protected $launchApi;

    protected function __construct($launchApiImplementer)
    {
        $this->launchApi = $launchApiImplementer;
    }

    public abstract function launch();
}

// FullRocket.php
class FullRocket extends Rocket
{
    public function __construct($launchApi)
    {
        parent::__construct($launchApi);
    }

    public function launch()
    {
        $this->launchApi->launch();
    }
}

// LaunchingScript.php
$redEngine = new RedEngine();
$redEngine->launch(); // this works

$redRocket = new FullRocket($redEngine);
$redRocket.launch(); // this won't work

错误抛出是：

design-patterns\Bridge>php LaunchingBridge.php
The red engine is really fast!!!
Fatal error: Call to undefined function launch() in \design-patterns\Bridge\LaunchingBridge.php on line 24

我尝试使用 & 通过引用传递，但它只会更改错误。

4

1 回答 1

1

是的，应该$redRocket->launch();不是$redRocket.launch(); 像 nigel ren 说的那样

于 2018-06-20T02:49:50.800 回答