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PHP状态模式

时间:2021-07-01 10:21:17 帮助过:28人阅读

####状态设计模式* 状态模式的作用是允许对象在状态改变时改变其行为* 对象中频繁的状态非常依赖于条件语句,就自身来说条件语句并没有什么问题,不过,如果选项太多,以至于程序出现混乱,或者增加或改变选项需要太多的是时间。```offState = new OffState($this);        $this->onState = new Onstate($this);        $this->brighterState = new BrighterState($this);        $this->brightestState = new BrightestState($this);        $this->currentState = $this->offState;    }    public function  turnOnLight(){        $this->currentState->turnLightOn();    }    public function turnOffLight(){        $this->currentState->turnLightOff();    }    public function turnBrighter(){        $this->currentState->turnBrighter();    }    public function turnBrightest(){        $this->currentState->turnBrightest();    }    public function setState(IState $state){        $this->currentState = $state;    }    public function getOnState(){        return $this->onState;    }    public function getOffState(){        return $this->offState;    }    public function getBrighterState(){        return $this->brighterState;    }    public function getBrightestState(){        return $this->brightestState;    }}interface IState{    public function turnLightOn();    public function turnLightOff();    public function turnBrighter();    public function turnBrightest();}class Onstate implements IState{    private $context;    public function __construct(Context $contextNew)    {        $this->context = $contextNew;    }    public function turnLightOff()    {        echo "Lights off"."
"; $this->context->setState($this->context->getOffState()); } public function turnLightOn() { echo "Light is already on there is no action"."
"; } public function turnBrighter() { echo "turn 明亮"."
"; } public function turnBrightest() { echo "turn 最亮"."
"; }}class OffState implements IState{ private $context; public function __construct(Context $contextNew) { $this->context = $contextNew; } public function turnLightOn() { echo "Lights On Now i can see"."
"; $this->context->setState($this->context->getOnState()); } public function turnLightOff() { echo "Light is already off"."
"; } public function turnBrightest() { echo "turn 最亮"."
"; } public function turnBrighter() { echo "turn 较亮"."
"; }}class BrighterState implements IState{ private $context; public function __construct(Context $contextNow) { $this->context = $contextNow; } public function turnBrighter() { echo "变暗了"; } public function turnBrightest() { $this->context->setState($this->context->getBrighterState()); } public function turnLightOff() { echo "关灯了"; } public function turnLightOn() { echo "灯是亮的"; }}class BrightestState implements IState{ private $context; public function __construct(Context $contextNow) { $this->context = $contextNow; } public function turnLightOff() { $this->context->setState($this->context->getOffState()); } public function turnBrightest() { echo "this is brightest"."
"; } public function turnBrighter() { echo "this is a little 暗淡"."
"; } public function turnLightOn() { echo "there is no use"."
"; }}class Client{ private $context; public function __construct() { $this->context = new Context(); $this->context->turnOnLight(); $this->context->turnOnLight(); $this->context->turnOffLight(); $this->context->turnOffLight(); $this->context->turnOnLight(); $this->context->turnBrighter(); $this->context->turnBrightest(); $this->context->turnOffLight(); }}$data = new Client();```

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