How to prevent memory leaks?

I was searching for tools that could help me find memory leaks faster and would be simple in implementation without affecting performance and memory size of application.

I found a fantastic fit for this task LifetimeTracker developed by Krzysztof Zabłocki.

All you need is to add LifetimeTracker package to the project, inherit from LifetimeTrackable protocol, and add two lines of code.

class Department: LifetimeTrackable {}

trackLifetime method to init of instance that you are going to verify, and lifetimeConfiguration property where you set max number of valid instances.

class Department: LifetimeTrackable {

    static var lifetimeConfiguration = LifetimeConfiguration(maxCount: 1, groupName: "Department")

    let name: String

    init(name: String) {
        self.name = name
        print("\(Self.self) is being initialized")
        trackLifetime()
    }

    var employee: Employee?

    deinit {
        print("\(Self.self) is being deinitialized")
    }

}

The final step is to add LifetimeTracker.setup to didFinishLaunchingWithOptions to be able to see Dashboard with detected issues.

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    #if DEBUG
      LifetimeTracker.setup(
        onUpdate: LifetimeTrackerDashboardIntegration(
        visibility: .alwaysVisible,
        style: .bar,
        textColorForNoIssues: .systemGreen,
        textColorForLeakDetected: .systemRed
        ).refreshUI
      )
    #else
    #endif
    return true
}

I hope this article will help you save time finding and debugging this tricky task :-).