#Objective-C

  1. Evolution of the programming languages from iPhone OS 1.0 to iOS 14

    In my previous article about Apple’s use of Swift and SwiftUI in iOS 14, I counted the number of built-in apps in iOS using Swift and SwiftUI. Several readers asked if I could provide a percentage rather than an absolute number. In this new article, I will answer this question by measuring the total number of binaries in iOS. I will go one step further and also count the number of binaries using other programming languages: Objective-C, C++ and C. Finally to be as complete as possible, I ran this analysis on all major iOS releases, from iPhone OS 1.0 to iOS 14. This will provide a detailed overview of the evolution of the different programming languages over more than a decade of iOS development.
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  2. Testing if an arbitrary pointer is a valid Objective-C object

    Let's say you pick a random pointer. Can we know if it points to a valid Objective-C object? Of course without crashing… Well there is no simple solution. In this post I give a solution for 64-bit architectures. The code provided has only been tested on macOS 10.12.1 and iOS 10.1.1 with the modern Objective-C runtime.
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