2021-02-08 23:37:48 +08:00
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---
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layout: pattern
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title: Delegation
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folder: delegation
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2021-08-01 22:55:54 +08:00
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permalink: /patterns/delegation/
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2021-02-08 23:37:48 +08:00
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categories: Structural
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2021-05-19 10:49:05 -06:00
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language: zh
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2021-02-08 23:37:48 +08:00
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tags:
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- Decoupling
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---
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## 或称
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代理模式
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## 目的
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它是一种让对象将某种行为向外部表达，但实际上将实现该行为的责任委托给关联对象的技术。
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## 类图
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2021-08-01 22:55:54 +08:00
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2021-02-08 23:37:48 +08:00
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## 适用性
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使用委托模式以实现以下目的
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* 降低类的耦合性
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* 组件的行为相同，但是意识到这种情况将来可能会改变。
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## 鸣谢
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* [Delegate Pattern: Wikipedia ](https://en.wikipedia.org/wiki/Delegation_pattern)
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* [Proxy Pattern: Wikipedia ](https://en.wikipedia.org/wiki/Proxy_pattern)
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