Button and action handling in iOS Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a button with the title "Press Me".

iOS Swift

let button = UIButton()
button.setTitle([1], for: .normal)

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

A"Button"

B"Click"

C"Tap"

D"Press Me"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the quotes around the title string.

Using the wrong title text.

The button title must be set as a string with quotes, exactly "Press Me".

2fill in blank

medium

Complete the code to add an action to the button that calls the method buttonTapped when pressed.

iOS Swift

button.addTarget(self, action: #selector([1]), for: .touchUpInside)

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

AbuttonTapped

BtapButton

CbuttonPressed

DpressedButton

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name that does not exist.

Missing the #selector syntax.

The selector must match the method name exactly, which is buttonTapped.

3fill in blank

hard

Fix the error in the method signature for the button action handler.

iOS Swift

@objc func [1](sender: UIButton) {
    print("Button was tapped")
}

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

AbuttonTap

BbuttonTapped

CbuttonTappedAction

DtapButton

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatch between selector name and method name.

Missing @objc attribute.

The method name must match the selector used when adding the target, which is buttonTapped.

4fill in blank

hard

Fill both blanks to create a button, set its title, and add it to the view.

iOS Swift

let button = UIButton(type: [1])
button.setTitle([2], for: .normal)
view.addSubview(button)

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

A.system

B"Click Me"

C.custom

D"Press"

Attempts:

3 left

💡 Hint

Common Mistakes

Using .custom type without setting appearance.

Forgetting quotes around the title.

Use .system for the button type and "Click Me" as the title string.

5fill in blank

hard

Fill all three blanks to create a button, set its title color, and add an action.

iOS Swift

let button = UIButton(type: [1])
button.setTitleColor([2], for: .normal)
button.addTarget(self, action: #selector([3]), for: .touchUpInside)

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

A.system

BUIColor.blue

CbuttonTapped

D.custom

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong button type.

Forgetting to use UIColor for colors.

Mismatch in action method name.

Use .system for button type, UIColor.blue for title color, and buttonTapped as the action method.