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Structural pattern mainly involves how to combine various objects in order to obtain a better and more flexible structure. Although the object-oriented inheritance mechanism provides the most basic function of subclass extending the parent class, the structural pattern not only uses inheritance simply, but also realizes more flexible functions ...

1. Adapter mode Adapter pattern is a structural design pattern that enables objects with incompatible interfaces to cooperate with each other. The adapter can act as a wrapper between two objects. It will receive calls to one object and convert it to a format and interface recognized by another object. 2. The adapter mode is suitable for appl ...

I. Introduction of models 1.1 definition Encapsulate the request into an object, which can parameterize other objects with different requests (inject different request dependencies into other objects), and support the queuing execution, logging, revocation and other (additional control) functions of requests (commands). 1.2 advantages Reduc ...

I've come to the responsibility chain mode. My guest, listen to my nonsense What is the responsibility chain model Responsibility chain model is a design model. In the responsibility chain model, many objects are connected by each object's reference to its next family to form a chain. Requests are passed along the chain until an object i ...

I. Introduction of models 1.1 definition Also known as part whole mode, it organizes a group of objects into a tree structure to represent a whole part hierarchy. Combination allows the client to unify the processing logic of single object and combined object. The client refers to the user of the code. The combination mode is generally used ...

preface From the previous articles, we can know the measurement and layout of ui. This time, let's first pay attention to how our ui is drawn. So here we first need to understand the specific drawing process and the role of paint and Canvas in this process Drawing process In previous courses, we mentioned that performmeasure, performlayout a ...

Factory method pattern is also called factory pattern. In the factory method mode, the factory parent class is responsible for defining the public interface for creating product objects, while the factory subclass is responsible for generating specific product objects. The purpose of this is to delay the instantiation of product classes to the ...

I'm < font color = #2941c0 > "kangarooking" < / font >, not my brother's brother. An Internet worm "gua" cow will climb up step by step with you. One day there will be a day for us. Pay attention to me and make a little progress every day ❗ ❗ ❗prefaceThe experience of learning design mode mentioned in the arti ...

Six principles of design mode 1. Purpose of design mode Design pattern is for better code reusability, readability, reliability and maintainability. 2. Six commonly used design modes 1) Single responsibility principle 2) Richter's substitution principle 3) Dependency Inversion Principle 4) Interface isolation principle 5) Dimitt's law 6) Open ...

I'm kangarooking, not my brother's brother. An Internet worm "gua" cow, climb up step by step with you, and one day there will be a day for us. Pay attention to me and make a little progress every day ❗ ❗ ❗Foreword (flicker)After reading the source code of some open source frameworks, I found that the responsibility chain model is ...