View controller life cycle

1. Unit 3—Lesson 8:
View Controller Life Cycle

2. View controller life cycle
Not Loaded
Disappeared
Appear
viewWillDisappear(_:)
viewWillAppear(_:)
viewDidLoad()
View Loaded
View Not Loaded
viewDidDisappear(_:) viewDidAppear(_:)

3. viewDidLoad( )
View controller life cycle
Not Loaded
Disappeared
Appear
viewWillDisappear(_:)
viewWillAppear(_:)
viewDidLoad()
View Loaded
View Not Loaded
viewDidDisappear(_:) viewDidAppear(_:)

4. View event management
viewWillAppear(_:)
viewDidAppear(_:)
viewWillDisappear(_:)
viewDidDisappear(_:)
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// Add your code here
}

5. viewWillAppear(_:)
View event management
Not Loaded
Disappeared
Appear
viewWillDisappear(_:)
viewWillAppear(_:)
viewDidLoad()
View Loaded
View Not Loaded
viewDidDisappear(_:) viewDidAppear(_:)

6. viewDidAppear(_:)
View event management
Not Loaded
Disappeared
Appear
viewWillDisappear(_:)
viewWillAppear(_:)
viewDidLoad()
View Loaded
View Not Loaded
viewDidDisappear(_:) viewDidAppear(_:)

7. viewWillDisappear(_:)
View event management
Not Loaded
Disappeared
Appear
viewWillDisappear(_:)
viewWillAppear(_:)
viewDidLoad()
View Loaded
View Not Loaded
viewDidDisappear(_:) viewDidAppear(_:)

8. viewDidDisappear(_:)
View event management
Not Loaded
Disappeared
Appear
viewWillDisappear(_:)
viewWillAppear(_:)
viewDidLoad()
View Loaded
View Not Loaded
viewDidDisappear(_:) viewDidAppear(_:)

9. View Controller Life Cycle
Unit 3—Lesson 8
This lesson will explain more about the view controller life cycle so you can
understand the infinite potential of this important class

10. Lab: Order of Events
Unit 3—Lesson 8
Further your understanding of the view's life cycle by creating an app that adds to
a label’s text based on the events in the view controller life cycle

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This work is licensed by Apple Inc. under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license.