A majority of the apps developed for iOS are native apps; these are developed in Objective-C and, since 2015, Swift. Apple has mandated the use of Swift for developing apps. This would be easy for those who have some background in object-oriented programming languages.
Objective-C is a strict superset of and augmentation to C; it is an object-oriented language that adds Smalltalk-style (an object-oriented, dynamically typed, reflective programming language) messaging to the C programming language and was created by Brad Cox and Tom Love in the early 1980s. This means that the Objective-C compiler can also compile C programs. The following diagram provides the sample Objective-C runtime and its components:
In Objective-C, one does not call the object one sends a message to. This language is mainly used on the Mac OS X and iOS operating systems and their APIs. The apps are compiled to native code and linked against the iOS SDK and Cocoa Touch...