What is difference between category and extension in IOS?
What is difference between category and extension in IOS?
A category allows you to add methods to an existing class—even to one for which you do not have the source. Class extensions are similar, but allow additional required APIs to be declared for a class in locations other than within the primary class @interface block.
What is category and extension in Swift?
Use category when you need to want to add any methods to a class whose source code is not available to you OR you want to break down a class into several files depending on its functionality. Use class extensions when you want to add some required methods to your class outside the main interface file.
What is the difference between an extension and a protocol extension?
Protocols let you describe what methods something should have, but don’t provide the code inside. Extensions let you provide the code inside your methods, but only affect one data type – you can’t add the method to lots of types at the same time.
What is category in iOS Swift?
Categories are a way to modularize a class by spreading its implementation over many files. Extensions provide similar functionality. One of the most common uses of categories is to add methods to built-in data types like NSString or NSArray .
What is category in Swift?
(Unlike Objective-C categories, Swift extensions do not have names.) Uses: Categories are a way to modularize a class by spreading its implementation over many files. Extensions provide similar functionality. One of the most common uses of categories is to add methods to built-in data types like NSString or NSArray .
What are Swift categories?
What is category in IOS?
A category allows you to add methods to an existing class—even to one for which you do not have the source. Categories are a powerful feature that allows you to extend the functionality of existing classes without subclassing.
What is category extension?
What is Category Extension? Category or Brand Extension is a strategy by which, a company uses the same brand to enter into a completely unrelated product segment. The company leverages on the brand equity and success of its existing brand to introduce the new product to increase market acceptance.
What is brand extension?
Brand extension refers to the use of Brand name for a whole new product or a product that is different from the parent product. You will hear some people referring to brand extension as Brand stretching.
What is the use of @class extension?
Class extensions are similar, but allow additional required APIs to be declared for a class in locations other than within the primary class @interface block. You can add methods to a class by declaring them in an interface file under a category name and defining them in an implementation file under the same name.
What is a designdesigner brand extension?
Designer Image/status – some brands just convey the status and create an image for the user. Brand extension is sometimes known as a category extension. It’s a very common practice in the market. Verily, many companies have practiced this strategy successfully, while others tried and failed.
