Programmatic navigation in iOS Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to push a new view controller onto the navigation stack.

iOS Swift

navigationController?.[1](DetailViewController(), animated: true)

Drag options to blanks, or click blank then click option'

Apresent

BpushViewController

CpopViewController

Ddismiss

Attempts:

3 left

💡 Hint

Common Mistakes

Using popViewController instead of pushViewController

Using present instead of pushViewController

Use pushViewController to navigate forward in a navigation stack.

2fill in blank

medium

Complete the code to pop the current view controller from the navigation stack.

iOS Swift

navigationController?.[1](animated: true)

Drag options to blanks, or click blank then click option'

ApushViewController

Bpresent

CpopViewController

Ddismiss

Attempts:

3 left

💡 Hint

Common Mistakes

Using pushViewController instead of popViewController

Using dismiss instead of popViewController

Use popViewController to go back to the previous screen in a navigation stack.

3fill in blank

hard

Fix the error in the code to present a view controller modally.

iOS Swift

present([1], animated: true, completion: nil)

Drag options to blanks, or click blank then click option'

ADetailViewController()

Bself

CnavigationController

Dself.navigationController

Attempts:

3 left

💡 Hint

Common Mistakes

Passing self instead of the new view controller

Passing navigationController instead of the new view controller

To present a new screen modally, pass the new view controller instance to present.

4fill in blank

hard

Fill both blanks to pop to the root view controller with animation.

iOS Swift

navigationController?.[1](animated: [2])

Drag options to blanks, or click blank then click option'

ApopToRootViewController

Btrue

Cfalse

DpopViewController

Attempts:

3 left

💡 Hint

Common Mistakes

Using popViewController instead of popToRootViewController

Setting animated to false when animation is desired

Use popToRootViewController(animated: true) to go back to the first screen with animation.

5fill in blank

hard

Fill all three blanks to replace the current view controller stack with a new one.

iOS Swift

navigationController?.[1]([[2]], animated: [3])

Drag options to blanks, or click blank then click option'

AsetViewControllers

BDetailViewController()

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using pushViewController instead of setViewControllers

Passing a single view controller instead of an array

Setting animated to false when animation is desired

Use setViewControllers with an array of new controllers and animation flag to replace the stack.