Design pattern:
Solve the problem of changing requirements (used when you have a deeper understanding of software or module relationships).
Coupling relationship between modules:
(The coupling relationship directly determines the behavior of the software in the face of changes)
[Module division, find out what has changed and what has not changed]
Relationship between modules
(1) Tight coupling: When a module changes, all related modules Change (2) Loose coupling
: Some modules are easier to be replaced or changed, but other modules remain unchanged Primary and secondary relationship and abstract detail relationship .
Main module (main logic): changes slowly or remains unchanged [high-level abstraction]
secondary module (interface + implementation): changes quickly [lower level details]
Factory mode:
An object is being created: Due to changes in requirements, the specific implementation of the object often faces drastic changes, but the interface is stable.
Structure (combined with code is easier to understand):
code implementation example:
scene, frame of car and test car
1. Car abstract class:
public abstract class AbstractCar
{
public abstract void Startup();
public abstract void Run();
public abstract void Turn();
public abstract void Stop();
}
2. Car abstract factory
public abstract class CarFactory
{
public abstract AbstractCar CreateCar();
}
3. Specific Hongqi brand vehicles and the factories of specific Hongqi vehicles
public class HongQiCar:AbstractCar//具体实现车
{
private int Speed;
public override void Startup()
{
}
public override void Run()
{
}
public override void Turn()
{
}
public override void Stop()
{
}
}
public class HongQICarFactory:CarFactory//具体工厂
{
public override AbstractCar CreateCar()
{
return new HongQiCar();
}
}
3. Vehicle test framework
public class CarTestFramework
{
public void BuildContext(CarFactory carFactory)//依赖接口
{
//需要多个实例
AbstractCar c1 = carFactory.CreateCar();
AbstractCar c2 = carFactory.CreateCar();
AbstractCar c3 = carFactory.CreateCar();
}
public void DoTest()
{
}
public void GetTestData()
{
}
}
4. Main function call
public static void Main(string[] args)
{
CarTestFramework carTestFramework = new CarTestFramework();
carTestFramework.BuildContext(new HongQICarFactory());
}
Main points:
