How do the methods of saving images as UIImage objects and Data in iOS applications differ?

UIImage and Data are two different ways to store images in iOS:

• UIImage is an object that contains an image in a form ready for display on the screen. It stores already parsed image data and provides convenient methods for working with it (e.g., scaling, rotation).

• Data is the raw bytes of an image, for example, in PNG or JPEG format. This is how the image is stored on disk or transmitted over the network.

Example usage:

// Saving UIImage to Data for writing to a file
if let image = UIImage(named: "photo"),
   let imageData = image.pngData() {
    // imageData can be saved to a file or sent over the network
}

// Creating UIImage from Data
if let data = try? Data(contentsOf: imageURL),
   let image = UIImage(data: data) {
    // image is ready for display
}

Thus, UIImage is convenient for working with images in the UI, while Data is used for storage and transmission.