Introduction to iOS programming

This post is an introduction to?iOS?development and will focus on the technologies provided and supported by Apple.

The basics of Swift and Xcode

Swift?is a modern programming language based on the main characteristics of other programming languages. Swift methods and parameters are naturally defined. In addition, Swift was designed to be fast. Its syntax and standard library have been improved so that it is very simple and intuitive to write code.

To develop Apple applications with Swift, it is necessary to work with the?IDE?called?Xcode. Xcode is available for download in the Mac?App Store?and comes ready to work with iOS. With Xcode, you can work to develop applications for mobile devices and programs for Macs, Apple Watch, and Apple TV. An advantage of using Xcode is that it checks to see if the code is well written. If it sees any errors, it displays them and proposes options to fix them.

What makes Apple unique?

The main features of iOS are as follows:

1. The home screen is designed with a grid of application icons and a bar at the bottom of the screen for the most used applications.
2. iOS offers several accessibility features to help people with hearing or vision problems.
3. New applications can be downloaded and installed from the App Store, where all the applications developed and approved by Apple are located.
4. iOS allows for multitasking. Apple provides background interfaces that allow you to manage features such as background audio, location, and Bluetooth.

Apple allows the development of a large number of applications through the use of the Swift programming language and the IDE, Xcode. However, there are differences between Apple’s apps and those of the other platforms. Two of those differences are clarity and depth. In any application, the text must be readable at any size, the icons must be precise and clear. Color, fonts, graphics, and interface elements should highlight important content and convey interactivity. Different visual layers and realistic movement through the depth of Apple products impart vitality and facilitate understanding. Transitions provide a sense of depth as you navigate through content.

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Vocabulary

iOS

iOS is an operating system for mobile devices developed by Apple Inc for its devices. iOS can run on any of the following devices: iPhone, iPad, iPod Touch and Apple TV.

Bug

A bug is an error, flaw or fault in a software program or system that can cause an unexpected result. Most bugs are due to human errors in source code or its design Software is called “buggy” when it contains a significant number of bugs.

App Store

An app store is an application that allows users to find and download software to install it on their computer or mobile device.

Gesture

A gesture is a sequence of events that happens when the users touches a screen with one or more flingers simultaneously. Examples of gestures are tap and drag.

Swift

Swift is a general-purpose, powerful and intuitive compiled programming language. It is used to develop applications for macOS, iOS, watchOS and tvOS. It was created by Apple.

IDE (integrated development environment)

An I.D.E. is a software application that provides all facilities for software programmers to develop software.

Xcode

Xcode is an integrated development environment for creating apps for Mac, iPhone, iPad, Apple Watch, and Apple TV and it provides a toolset for user interface design, coding, testing, debugging, and submitting apps to the App Store.

Multitouch

Multitouch is the ability of a touch sensing surface to detect input from more than one point of contact with the surface simultaneously.

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