Apple has been creating waves in the mobile industry for years due to their stellar series of iPads, iPods and iPhones. There’s a huge hype whenever Apple releases a new app or a better version of an operating system, and users love it as Apple products are user-friendly and durable. Despite the competition from other companies in the industry, Apple has managed to find a strong foothold, thanks to Steve Jobs. As the company advances with every new release, clients want their applications in the Apple Store. This surge of popularity is great business for your mobile app career.
Apple holds a huge number of shares in the mobile industry, so this is a great reason for you to learn iPhone app development. The best part of developing apps for iPhones is that you don’t need to be very experienced. It’s not really as difficult as you may think and you can start off by learning some basic code. These steps will help you if you’re doing it for business or just for fun.
You need a few basics before you can develop for Apple. Basically, you need a computer with Mac OS and an installation of the IDE Xcode. These requirements are also used for iPads, iPhones and iPod Touch. Therefore, if you learn to develop apps for an iPhone, your newfound information applies to all the devices powered by iOS. Some other technical specifications that help you code for iOS:
- iPhones are built on Apple’s OS, which is built on Unix
- iPhone has a mobile version of Safari browser
- Supports WAN and LAN networking using Wi-Fi
- Uses GPS over Wi-Fi and data provided by service provider
- Objective-C is the programming language used for all Apple frameworks.
These are just the basics for you to get an idea of what you can expect.
First, you need the iOS SDK (Software Development Kit) developed by Apple and first released in 2008 to help you with native applications. This SDK provides built-in functionality and other frameworks for development of native applications that run on the iPhone. The iPhone SDK uses the Objective-C language, which is an extension of the C language. It is an object oriented programming language that Apple uses for its development purposes. It works entirely on objects that form the core since the entire iPhone OS framework is developed in this language. The iPhone SDK contains many standard classes, which are directly used by the developer, and they also include sub-classes that can be added as functionality requirements.
iPhone OS has Four Layers:
Cocoa Touch: It is a base framework that provides you with user-interface frameworks, which include management of user interfaces, event support and window support.
Media: It provides methods to handle audio and video built into the iPhone.
Core Services: This framework is used in all the applications and data types.
Core OS: Kernel level software that deals with threading, networking, input and output and memory
What is Xcode?
Xcode is the IDE developed by Apple to perform iOS development in all forms. It’s software that can be used easily and has made iPhone development look simpler. In addition, it has a wide range of functionalities. It contains predefined classes and code that can be directly used by the developer. It provides an excellent interface to develop and design applications. The available drag-and-drop features help developers manage their user interface elements smoothly. Various classes and different parts of the application can be easily linked without much overhead. Xcode also contains the SDK and iPhone simulator on which your application can be is tested in real environment.
Model: Holds the data and variables and logic of the program. This layer is completely detached from the view to make it simpler for a novice to make changes.
View: As the name suggests, this layer deals with what is displayed on the screen of our application
Controller: It is a mediator between the model and view. The view objects are connected to the View Controller from which the information is passed on to the model. Controller is a refined way to hide front and back end from each other.
The model contains all functions of the app but does not interact with the user directly.
Steps to design an application:
- Install the Xcode and Developing Environment and become comfortable with Objective -C
- Create an Apple Developer Account on the iOS Dev Center website
- Create a new Project on Xcode under iOS and click the Application menu.
- Create a storyboard and assign it to the project. Add the first screen using ViewController.
- Create the user interface by dragging and dropping views.
- Build and Run the app on iPhone Simulator
So you can now start the development process. As mentioned, this tutorial is for beginners who want to understand the basics of iPhone app development. The development process is very vast and has several phases. However, as a beginner, you must understand the basics first and plan and sketch the first phase.
If you want to create an app, you need an idea of how the app functions. In addition, you might have to think about the features you want to add and ensure that people download the app based on those features. If you go through this phase, which is the most difficult part, everything else will be smoother later on. You’ll save a lot of time by planning and sketching everything, before you get down to designing an app.