桥接模式属于结构型模式,何为结构型模式,即结构型设计模式是从程序的结构上解决模块之间的耦合问题(低耦合)
概述:将抽象部分与它的实现部分分离,使他们都可以独立的变化
桥接模式:
将抽象部分与它的实现部分分离,使他们都可以独立的变
抽象与它的实现分离,即抽象类和它的派生类用来实现自己的对象
桥接与适配器模式的关系(适配器模式后面讲解)
桥接属于聚合关系,两者关联 但不继承
适配器属于组合关系,适配者需要继承源
聚合关系:A对象可以包含B对象 但B对象不是A对象的一部分
个人举例:
1 大雁和雁群
2 手机软件和手机品牌功能
组成关系:
鸟和翅膀的关系
namespace haibao\design\web\view\design;
use haibao\design\web\common\design\bridge\PhoneBrandNokia;
use haibao\design\web\common\design\bridge\PhoneBrandApple;
use haibao\design\web\common\design\bridge\PhoneGame;
use haibao\design\web\common\design\bridge\PhoneList;
class Bridge extends \haibao\design\web\view\Base{
protected function preRender(){
header("Content-type: text/html; charset=utf-8");
$nokia = new PhoneBrandNokia();
$nokia->setPhoneSoft(new PhoneGame('诺基亚'));
$nokia->run();
echo '
';
$nokia->setPhoneSoft(new PhoneList('诺基亚'));
$nokia->run();
echo '
';
$apple = new PhoneBrandApple();
$apple->setPhoneSoft(new PhoneGame('苹果'));
$apple->run();
echo '
';
$apple->setPhoneSoft(new PhoneList('苹果'));
$apple->run();
echo '
';
}
}
/**
* 手机品牌
*/
namespace haibao\design\web\common\design\bridge;
abstract class PhoneBrand{
public $phoneSoft;
public function setPhoneSoft($phoneSoft){
$this->phoneSoft = $phoneSoft;
}
public function run(){}
}
/**
* 苹果
*/
namespace haibao\design\web\common\design\bridge;
class PhoneBrandApple extends PhoneBrand{
public function run(){
$this->phoneSoft->run();
}
}
/**
* 诺基亚
*/
namespace haibao\design\web\common\design\bridge;
class PhoneBrandNokia extends PhoneBrand{
public function run(){
$this->phoneSoft->run();
}
}
/**
* 手机游戏
*/
namespace haibao\design\web\common\design\bridge;
class PhoneGame extends PhoneSoft{
public $name;
public function __construct($name){
$this->name = $name;
}
public function run(){
echo '运行'.$this->name.'平台手机游戏';
}
}
/**
* 手机通讯录
*/
namespace haibao\design\web\common\design\bridge;
class PhoneList extends PhoneSoft{
public $name;
public function __construct($name){
$this->name = $name;
}
public function run(){
echo '运行'.$this->name.'手机通讯录';
}
}
/**
* 手机软件
*/
namespace haibao\design\web\common\design\bridge;
abstract class PhoneSoft{
public function run(){}
}