Introduction - If you have any usage issues, please Google them yourself
Rational use of design patterns in the development process of the application, not only can solve practical problems, improve development efficiency, but also can make the program structure more clear and reasonable, has a great help to achieve the design purpose of low coupling and high cohesion ". At present, there are many design patterns introduced articles online, some are self-contained, covering all modes of GoF, but most articles are similar to some simple type design as an example (such as Animal, Cat, Dog, Fruit, Apple, Banana etc.), although easy to understand, but after reading, found from the actual there is still a certain distance application. In view of this situation