Apple uses Swift more than in iOS 13

Apple released the Swift programming language at WWDC in 2014, and Swift is the future programming language for the Apple platform. Since then, many third-party developers have started writing programs in Swift, but Apple’s iOS and macOS systems, as well as various system applications, are still written in Objective-C.

There are many reasons for this. First, Apple’s current large amount of Objective-C code works perfectly. There is no need to rewrite it. Don’t create new problems without problems. Second, until Swift 5.0, ABI was stable, Swift 5.1, and modules were stable, which was important for large-scale deployment at the system level.

Since iOS 9, developer Alexandre Colucci has been counting the use of Swift in the Apple system. The latest data shows that in iOS 13, there are a total of 141 binary executables written in Swift, more than twice as many as iOS 12.

In iOS 13, new features and new applications such as Sidecar, Find My and Reminders are written in Swift. Other apps that use Swift include Health, Books, and some system services, AirPods and HomePod pairing services, and find apps and more.

Source: 9to5mac