What is Factory Pattern in iOS?
Factory method is a creational design pattern which solves the problem of creating product objects without specifying their concrete classes. Factory Method defines a method, which should be used for creating objects instead of direct constructor call ( new operator).
What is Factory Design Pattern explain with example?
A Factory Pattern or Factory Method Pattern says that just define an interface or abstract class for creating an object but let the subclasses decide which class to instantiate. In other words, subclasses are responsible to create the instance of the class.
What is Factory Design Pattern with real time example?
As per example, if client passes 0, then it will return the instance of the Honda Car, if they pass 1, then it will return the instance of BMW car. In future, if a new car is launched e.g. Suzuki, there is no need to add anything on the client side. You just need to add one case for Suzuki to get the instance.
What are the different design patterns in iOS?
All the patterns can be divided into three categories: creational, structural, and behavioral.
- Singleton (Creational category) Imagine a situation where you need only one object copy.
- Factory Method (Creational category)
- Abstract Factory (Creational category)
- Builder (Creational category)
- Facade (Structural category)
What is the benefit of factory pattern?
Advantage of Factory Design Pattern Factory Method Pattern allows the sub-classes to choose the type of objects to create. It promotes the loose-coupling by eliminating the need to bind application-specific classes into the code.
What is MVVM in iOS?
MVVM (Model View ViewModel) is a design pattern, which has been widely used as more event-driven apps have started emerging. A few years back, if anyone built a product, it has probably been built using MVC (Model View Controller). In recent times, the MVC architecture has lost its place as the default design pattern.
Where is Factory Pattern used?
The factory design pattern is used when we have a superclass with multiple sub-classes and based on input, we need to return one of the sub-class. This pattern takes out the responsibility of the instantiation of a class from the client program to the factory class.
What problem does Factory Pattern solve?
Which is better MVC or MVVM iOS?
Conclusion. The difference between the MVC and MVVM is View and controller are responsible for calculating the value and assigning the value so the load is more on View and Controller where in MVVM View and Controller are only responsible for assigning the value not calculating the value.
Does iOS use MVVM?
There are several advantages of migrating to MVVM from MVC in case of iOS app development. You can also evaluate the available design patterns for iOS development to understand why to use MVVM beyond the MVC design pattern.
What is a factory pattern?
We’ll be focusing on a family of design patterns we call Factory Patterns. The group includes the Simple Factory, Factory Method and Abstract Factory patterns: Simple Factory: Strictly speaking, it’s not a design pattern, but a technique we use very often. It encapsulates the object instantiation process.
What is the use of InFactory pattern?
In Factory pattern, we create object without exposing the creation logic to the client and refer to newly created object using a common interface.
What is the abstract factory pattern in Python?
The abstract factory pattern is very similar to the one described above, except that it’s used to create a group of objects. The pattern cannot forecast which implementation will be used, but it helps you select the appropriate specific object. This method is situated in the base abstract class. We can use it in the structure of Car:
What is the most used pattern in software development?
Probably the factory pattern is one of the most used patterns. For example a graphical application works with shapes. In our implementation the drawing framework is the client and the shapes are the products.