iOS Application Development Using Swift

Apple's mobile operating system — iOS — runs the iPhone, iPad, and iPod Touch devices. Originally known as the iPhone OS, the name was changed with the introduction of the iPad.

It uses a multi-touch interface in which simple gestures operate the device, such as swiping your finger across the screen to move to the next page or pinching your fingers to zoom out.

There are more than 2 million iOS apps available for download in the Apple App Store, the most popular app store of any mobile device.

Swift is a powerful and intuitive programming language for macOS, iOS, watchOS, tvOS and beyond. Writing Swift code is interactive and fun, the syntax is concise yet expressive, and Swift includes modern features developers love. Swift code is safe by design, yet also produces software that runs lightning-fast.

Swift 5 makes it dramatically easier to release your apps. Because the Swift runtime is now built into iOS, macOS, tvOS, and watchOS, your app no longer needs to bundle this library for these latest OS releases. Users who download an app built with Swift from the App Store will get a smaller app and a faster download.