Application Lifecycle

Launch time:

• Application willFinishLaunchingWithOptions
• Application didFinishLaunchingWithOptions

Transitioning to the foreground:

• applicationDidBecomeActive

Transitioning to the background:

• applicationDidEnterBackground

Transitioning to the inactive state:

• applicationWillResignActive: Called when leaving the foreground
• applicationWillEnterForeground: Called when transitioning out of the background

Termination:

• applicationWillTerminate: Called only when the app is running. Not called if app is suspended

Related articles:

• Application States

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