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by The Captain

July 28, 2023

Implementing Singleton Pattern in Swift

In Swift, the Singleton pattern is a creational design pattern that ensures a class has only one instance and provides a global point of access to it. This is useful when you want to restrict the instantiation of a class to a single object throughout your program.

To implement the Singleton pattern in Swift, you can create a class with a private initializer and a static property that returns the shared instance. Here's an example:

class MySingleton {
    static let shared = MySingleton()
    private init() {
        // Initialization code
    func someMethod() {
        // Method implementation

In the example above, the `shared` property is declared as `static` so it can be accessed globally without the need for instantiation. The private initializer ensures that no other instances of the class can be created from outside the class itself.

Once you have defined your Singleton class, you can access its shared instance as follows:

let sharedInstance = MySingleton.shared

By using the Singleton pattern, you can ensure that there is only one instance of a class throughout your application, making it useful for managing shared resources or maintaining global state.

In conclusion, the Singleton pattern in Swift allows you to create a class with a single instance that can be accessed globally. This can be useful when you want to restrict object instantiation or manage shared resources efficiently.