Camera and photo library in iOS Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the framework needed to access the photo library.

iOS Swift

import UIKit
import [1]

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

AMapKit

BPhotosUI

CCoreData

DAVFoundation

Attempts:

3 left

💡 Hint

Common Mistakes

Importing unrelated frameworks like CoreData or MapKit.

Forgetting to import PhotosUI when working with photo library.

The PhotosUI framework is used to access the photo library and camera features in iOS apps.

2fill in blank

medium

Complete the code to declare a UIImagePickerController variable.

iOS Swift

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
  var imagePicker = [1]()
}

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

AUIImage

BUIImageView

CUIViewController

DUIImagePickerController

Attempts:

3 left

💡 Hint

Common Mistakes

Using UIImageView instead of UIImagePickerController.

Confusing UIViewController with UIImagePickerController.

The UIImagePickerController is the class used to present the camera or photo library interface.

3fill in blank

hard

Fix the error in the code to present the image picker for the photo library.

iOS Swift

func openPhotoLibrary() {
  imagePicker.sourceType = [1]
  present(imagePicker, animated: true)
}

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AUIImagePickerController.SourceType.photoLibrary

BUIImagePickerController.SourceType.camera

CUIImagePickerController.SourceType.savedPhotosAlbum

DUIImagePickerController.SourceType.photoAlbum

Attempts:

3 left

💡 Hint

Common Mistakes

Using camera source type when wanting the photo library.

Using a non-existent source type like photoAlbum.

To open the photo library, set sourceType to photoLibrary.

4fill in blank

hard

Fill both blanks to check if the camera is available and set the source type accordingly.

iOS Swift

if UIImagePickerController.isSourceTypeAvailable([1]) {
  imagePicker.sourceType = [2]
}

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

AUIImagePickerController.SourceType.camera

BUIImagePickerController.SourceType.photoLibrary

CUIImagePickerController.SourceType.savedPhotosAlbum

DUIImagePickerController.SourceType.cameraRoll

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for photoLibrary availability but setting camera source type.

Using non-existent source types like cameraRoll.

First, check if the camera is available, then set the source type to camera.

5fill in blank

hard

Fill all three blanks to implement the delegate method that handles the selected image.

iOS Swift

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
  if let selectedImage = info[[1]] as? [2] {
    imageView.image = selectedImage
  }
  picker.[3](animated: true, completion: nil)
}

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AUIImagePickerController.InfoKey.originalImage

BUIImagePickerController.InfoKey.editedImage

CUIImage

Ddismiss

Attempts:

3 left

💡 Hint

Common Mistakes

Using editedImage key when originalImage is expected.

Not casting the image to UIImage.

Forgetting to dismiss the picker.

The delegate method uses InfoKey.originalImage to get the selected image as a UIImage, then dismisses the picker.