外观在 Swift 中的实现
Facade is a structural design pattern that provides a simplified (but limited) interface to a complex system of classes, library or framework.
While Facade decreases the overall complexity of the application, it also helps to move unwanted dependencies to one place.
在 Swift 中使用模式
Usage examples: The Facade pattern is commonly used in apps written in Swift. It's especially handy when working with complex libraries and APIs.
Identification: Facade can be recognized in a class that has a simple interface, but delegates most of the work to other classes. Usually, facades manage full life cycle of objects they use.