iOS Interview Prepration

iOS App Life Cycle

iOS Interview Prepration

The iOS app life cycle refers to the sequence of states that an app goes through from its launch to its termination.

iOS Interview Prepration

Understanding the life cycle is crucial for managing resources, saving state, and responding appropriately to various events.

iOS Interview Prepration

The life cycle is primarily managed through the AppDelegate, which conforms to the UIApplicationDelegate protocol.

iOS Interview Prepration

The app is not yet launched or has been terminated by the user.

1.Not Running

iOS Interview Prepration

The app is running in the foreground, but not receiving events (e.g., during a phone call or when the screen is locked

2.Inactive

iOS Interview Prepration

The app is running in the foreground and receiving events.

3.Active

iOS Interview Prepration

The app is in the background and executing code. Limited time is available to complete tasks.

4.Background

iOS Interview Prepration

The app is in the background but not executing code. Resources may be reclaimed by the system

5.Suspended

iOS Interview Prepration

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