Singleton Pattern in Swift

A singleton object ensures that no matter how many times you create or retrieve an instance of a class, you always get the same object. Whether dealing with audio effects or network utilities, singletons give your app a unified way to access shared resources or services. Singleton in Objective-C In OC, singletons are implemented by calling the initialization method inside a block. Singleton in Swift In Swift, singletons are implemented using a lazily initialized static class property (which is guaranteed to be initialized only once). This is thread-safe even under concurrent access. If you need additional setup during initialization, you can use a closure: This section is largely translated from Apple's official documentation: