WWDC23 SALE: Save 50% on all my Swift books and bundles! >>

UIImageWriteToSavedPhotosAlbum(): how to write to the iOS photo album

Swift version: 5.6

Paul Hudson    @twostraws   

It's not hard to save an image straight to the user's photo library, but I have to admit the syntax isn't immediately obvious! iOS has a function called UIImageWriteToSavedPhotosAlbum() that takes four parameters: parameter one is the image to save, parameters two and three set a delegate and selector to send when the image has been written successfully, and parameter four is any additional context information you wan to send.

For example, you might use it like this:

UIImageWriteToSavedPhotosAlbum(yourImage, self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)

That will write the image to the photo library, then call a method when it completes. That method needs to be named very precisely, which is where it's easy to go wrong. Using the call above, you need to write your callback method like this:

@objc func image(_ image: UIImage, didFinishSavingWithError error: NSError?, contextInfo: UnsafeRawPointer) {
    if let error = error {
        // we got back an error!
        let ac = UIAlertController(title: "Save error", message: error.localizedDescription, preferredStyle: .alert)
        ac.addAction(UIAlertAction(title: "OK", style: .default))
        present(ac, animated: true)
    } else {
        let ac = UIAlertController(title: "Saved!", message: "Your altered image has been saved to your photos.", preferredStyle: .alert)
        ac.addAction(UIAlertAction(title: "OK", style: .default))
        present(ac, animated: true)
    }
}
Save 50% in my WWDC23 sale.

SAVE 50% To celebrate WWDC23, all our books and bundles are half price, so you can take your Swift knowledge further without spending big! Get the Swift Power Pack to build your iOS career faster, get the Swift Platform Pack to builds apps for macOS, watchOS, and beyond, or get the Swift Plus Pack to learn advanced design patterns, testing skills, and more.

Save 50% on all our books and bundles!

Available from iOS 2.0 – see Hacking with Swift tutorial 13

Similar solutions…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

BUY OUR BOOKS
Buy Pro Swift Buy Pro SwiftUI Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Beyond Code

Was this page useful? Let us know!

Average rating: 4.1/5

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.