KeyboardAvoidingView in React Native - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import KeyboardAvoidingView from React Native.

React Native

import { View, TextInput, [1] } from 'react-native';

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

AKeyboardManager

BKeyboardListener

CKeyboardHandler

DKeyboardAvoidingView

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent component like KeyboardListener.

Confusing KeyboardAvoidingView with KeyboardManager.

The KeyboardAvoidingView component is imported from 'react-native' to help adjust the UI when the keyboard appears.

2fill in blank

medium

Complete the code to wrap the TextInput with KeyboardAvoidingView.

React Native

return (
  <[1] behavior="padding" style={{ flex: 1 }}>
    <TextInput placeholder="Type here" />
  </[1]>
);

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

AKeyboardAvoidingView

BView

CScrollView

DSafeAreaView

Attempts:

3 left

💡 Hint

Common Mistakes

Using View which does not adjust for keyboard.

Using ScrollView without keyboard props.

The KeyboardAvoidingView wraps the input to move it above the keyboard when it appears.

3fill in blank

hard

Fix the error in the KeyboardAvoidingView behavior prop to use the correct value for iOS.

React Native

<KeyboardAvoidingView behavior=[1] style={{ flex: 1 }}>
  <TextInput placeholder="Enter text" />
</KeyboardAvoidingView>

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

A"padding"

B"height"

C"position"

D"scroll"

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'height' which is valid but less common on iOS.

Using invalid values like 'scroll'.

On iOS, the recommended behavior prop value is "padding" to move content above the keyboard.

4fill in blank

hard

Fill both blanks to set KeyboardAvoidingView to adjust only on iOS and use the correct keyboardVerticalOffset.

React Native

const isIOS = Platform.OS === 'ios';

return (
  <KeyboardAvoidingView behavior=[1] keyboardVerticalOffset=[2] style={{ flex: 1 }}>
    <TextInput placeholder="Input" />
  </KeyboardAvoidingView>
);

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

A"padding"

B64

C"height"

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 for keyboardVerticalOffset causing overlap.

Using 'height' behavior on iOS without testing.

On iOS, behavior is set to "padding" and keyboardVerticalOffset is often set to 64 to offset the keyboard height properly.

5fill in blank

hard

Fill all three blanks to create a KeyboardAvoidingView that only adjusts on iOS, uses a vertical offset, and contains a TextInput with a placeholder.

React Native

import React from 'react';
import { KeyboardAvoidingView, TextInput, Platform } from 'react-native';

export default function App() {
  return (
    <KeyboardAvoidingView behavior=[1] keyboardVerticalOffset=[2] style={{ flex: 1 }}>
      <TextInput placeholder=[3] style={{ height: 40, borderColor: 'gray', borderWidth: 1 }} />
    </KeyboardAvoidingView>
  );
}

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

A"padding"

BPlatform.OS === 'ios' ? 80 : 0

C"Enter your name"

D"height"

Attempts:

3 left

💡 Hint

Common Mistakes

Not using Platform.OS to conditionally set offset.

Leaving placeholder empty or missing.

This code sets behavior to "padding" for iOS, uses a conditional vertical offset, and adds a placeholder text to the input.

Practice

1. What is the main purpose of KeyboardAvoidingView in React Native?

easy

A. To move UI elements so they are not hidden by the keyboard

B. To change the keyboard layout

C. To disable the keyboard

D. To style the keyboard colors

Solution

1. Step 1: Understand the role of KeyboardAvoidingView

   KeyboardAvoidingView adjusts the screen layout when the keyboard appears so inputs stay visible.

2. Step 2: Identify the correct purpose

   It does not change keyboard layout or disable it, only moves UI elements to avoid overlap.

3. Final Answer:

   To move UI elements so they are not hidden by the keyboard -> Option A

4. Quick Check:

   KeyboardAvoidingView purpose = move UI [OK]

Hint: Remember: It moves views, does not change keyboard itself [OK]

Common Mistakes:

• Thinking it changes keyboard style
• Confusing it with keyboard disabling
• Assuming it controls keyboard input

2. Which of the following is the correct way to set the behavior prop for KeyboardAvoidingView on iOS?

easy

A.

B.

C.

D.

Solution

1. Step 1: Recall iOS recommended behavior

   On iOS, the common behavior is "padding" to add padding when keyboard appears.

2. Step 2: Match behavior prop value

   "padding" is the correct string to use; "height" and "position" are valid but less common on iOS; "scroll" is invalid.

3. Final Answer:

   <KeyboardAvoidingView behavior="padding"> -> Option D

4. Quick Check:

   iOS behavior = padding [OK]

Hint: Use "padding" for iOS KeyboardAvoidingView behavior [OK]

Common Mistakes:

• Using invalid behavior like "scroll"
• Confusing Android and iOS behavior props
• Omitting quotes around behavior value

3. What will happen when this code runs on Android?

import React from 'react';
import { KeyboardAvoidingView, TextInput, Platform } from 'react-native';

export default function App() {
  return (
    <KeyboardAvoidingView behavior={Platform.OS === 'ios' ? 'padding' : 'height'} style={{ flex: 1 }}>
      <TextInput placeholder="Type here" style={{ marginTop: 100, height: 40, borderColor: 'gray', borderWidth: 1 }} />
    </KeyboardAvoidingView>
  );
}

medium

A. The TextInput will be hidden behind the keyboard

B. The TextInput will move up when keyboard appears to stay visible

C. The app will crash due to invalid behavior prop

D. The keyboard will not appear at all

Solution

1. Step 1: Analyze behavior prop for Android

   For Android, behavior is set to "height", which adjusts the view height to avoid keyboard overlap.

2. Step 2: Predict UI behavior

   TextInput will move up as KeyboardAvoidingView adjusts height, keeping input visible.

3. Final Answer:

   The TextInput will move up when keyboard appears to stay visible -> Option B

4. Quick Check:

   Android behavior = height moves input up [OK]

Hint: Check Platform.OS to know behavior effect [OK]

Common Mistakes:

• Assuming behavior prop causes crash
• Thinking keyboard won't appear
• Ignoring platform-specific behavior

4. Identify the error in this code snippet:

import { KeyboardAvoidingView, TextInput } from 'react-native';

export default function App() {
  return (
    <KeyboardAvoidingView behavior="padding" style={{ flex: 1 }}>
      <TextInput placeholder="Enter text" />
    </KeyboardAvoidingView>
  );
}

The keyboard still hides the TextInput on iOS devices.

medium

A. Missing <ScrollView> to enable scrolling when keyboard appears

B. behavior prop should be set to "height" on iOS

C. TextInput needs a fixed height style

D. KeyboardAvoidingView must be wrapped in a View with flex: 0

Solution

1. Step 1: Understand KeyboardAvoidingView limits

   KeyboardAvoidingView alone may not scroll content; without ScrollView, inputs can be hidden if screen is small.

2. Step 2: Identify missing scroll container

   Wrapping content in ScrollView allows scrolling when keyboard appears, preventing hiding.

3. Final Answer:

   Missing <ScrollView> to enable scrolling when keyboard appears -> Option A

4. Quick Check:

   Use ScrollView with KeyboardAvoidingView to avoid hiding [OK]

Hint: Add ScrollView inside KeyboardAvoidingView for scroll [OK]

Common Mistakes:

• Changing behavior prop incorrectly
• Not using flex: 1 on container
• Assuming fixed height fixes keyboard overlap

5. You want to create a form that works well on both iOS and Android. Which is the best way to use KeyboardAvoidingView to handle the keyboard properly?

hard

A. Set behavior to "position" on iOS only and do not use ScrollView

B. Set behavior to "padding" on all platforms and wrap inputs in a ScrollView

C. Set behavior to "height" on Android, "padding" on iOS, and wrap inputs in a ScrollView

D. Do not use KeyboardAvoidingView; rely on default keyboard behavior

Solution

1. Step 1: Choose platform-specific behavior

   Best practice is to use "padding" on iOS and "height" on Android for KeyboardAvoidingView behavior.

2. Step 2: Wrap inputs in ScrollView

   ScrollView allows content to scroll if keyboard covers inputs, improving usability on small screens.

3. Final Answer:

   Set behavior to "height" on Android, "padding" on iOS, and wrap inputs in a ScrollView -> Option C

4. Quick Check:

   Platform behavior + ScrollView = best keyboard handling [OK]

Hint: Use platform check for behavior and add ScrollView [OK]

Common Mistakes:

• Using same behavior for all platforms
• Not wrapping inputs in ScrollView
• Ignoring Android keyboard behavior differences