TextField in iOS Swift - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a TextField in iOS Swift?

A TextField is a UI element that lets users enter and edit text in an app. It looks like a box where you can type.

beginner

How do you create a simple TextField in SwiftUI?

Use TextField("Placeholder", text: $variable) where variable stores the typed text.

intermediate

What is the purpose of the @State property wrapper with a TextField?

@State keeps track of the text typed by the user and updates the UI when the text changes.

intermediate

How can you customize the keyboard type for a TextField?

Use the .keyboardType() modifier with options like .numberPad or .emailAddress to show the right keyboard.

beginner

Why is accessibility important for TextField?

Accessibility helps users with disabilities use the TextField by providing labels and hints for screen readers.

Which SwiftUI code creates a TextField with a placeholder "Enter name"?

A TextField("Enter name", text: $name)

B TextField($name, "Enter name")

C TextField(text: $name)

D TextField("name")

The correct syntax is TextField("Placeholder", text: $variable).

What does the @State property do when used with a TextField?

A Disables the text field

B Creates a new keyboard

C Changes the font size

D Stores and updates the text input by the user

@State keeps the text value and updates the UI when it changes.

How do you change the keyboard to show numbers only for a TextField?

A .keyboardType(.emailAddress)

B .keyboardType(.numberPad)

C .keyboardType(.default)

D .keyboardType(.asciiCapable)

Use .keyboardType(.numberPad) to show a number-only keyboard.

Which modifier adds a label for screen readers to a TextField?

A .accessibilityLabel("label")

B .font(.label)

C .textContentType("label")

D .keyboardType("label")

.accessibilityLabel() provides a description for screen readers.

What happens if you forget to bind a TextField to a @State variable?

A The keyboard won’t appear

B The app crashes immediately

C The text field won’t update or store user input

D The text field becomes read-only

Without binding, the TextField can’t save or show changes.

Explain how to create a basic TextField in SwiftUI and why binding with @State is necessary.

Think about how the app remembers what the user types.

Describe how to improve accessibility for a TextField in an iOS app.

Consider users who rely on voice feedback.