How to Save Picture to Iphone Photo Library

How to save picture to iPhone photo library?

You can use this function:

UIImageWriteToSavedPhotosAlbum(UIImage *image, 
                               id completionTarget, 
                               SEL completionSelector, 
                               void *contextInfo);

You only need completionTarget, completionSelector and contextInfo if you want to be notified when the UIImage is done saving, otherwise you can pass in nil.

See the official documentation for UIImageWriteToSavedPhotosAlbum().

Take a photo and save to photo library in Swift

Use below code for an image taken from Photo Gallery and save inside photo library.

Code Support for Swift 3.1 & 4.0 version:

First, we have to do the setup for Permissions inside Project's .plist file:-

1) Camera

<key>NSCameraUsageDescription</key>
<string>This app will use camera.</string>

2) Photo Library

<key>NSPhotoLibraryUsageDescription</key>
<string>You can select photos to attach to reports.</string>

3) Save to Photo Library

<key>NSPhotoLibraryAddUsageDescription</key>
<string>Please allow access to save photo in your photo library</string>

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We need to open .pilst file as a Source code type then add permissions inside -

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After That

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import UIKit

class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate  {

    @IBOutlet weak var imageTake: UIImageView!

  var imagePicker: UIImagePickerController!
    override func viewDidLoad() {
        super.viewDidLoad()
    }

    //MARK: - Take image
    @IBAction func takePhoto(_ sender: UIButton) {
        imagePicker =  UIImagePickerController()
        imagePicker.delegate = self
        imagePicker.sourceType = .camera
        present(imagePicker, animated: true, completion: nil)
    }

    //MARK: - Saving Image here
    @IBAction func save(_ sender: AnyObject) {
        UIImageWriteToSavedPhotosAlbum(imageTake.image!, self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)
    }

    //MARK: - Add image to Library
    func image(_ image: UIImage, didFinishSavingWithError error: Error?, 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)
        }
    }

    //MARK: - Done image capture here
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
         imagePicker.dismiss(animated: true, completion: nil)
        imageTake.image = info[UIImagePickerControllerOriginalImage] as? UIImage
    }

}

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Swift 4.2 Code update -

 class ViewController: UIViewController, UINavigationControllerDelegate  {

    @IBOutlet weak var imageTake: UIImageView!
    var imagePicker: UIImagePickerController!

    enum ImageSource {
        case photoLibrary
        case camera
    }

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    //MARK: - Take image
    @IBAction func takePhoto(_ sender: UIButton) {
        guard UIImagePickerController.isSourceTypeAvailable(.camera) else {
            selectImageFrom(.photoLibrary)
            return
        }
        selectImageFrom(.camera)
    }

    func selectImageFrom(_ source: ImageSource){
        imagePicker =  UIImagePickerController()
        imagePicker.delegate = self
        switch source {
        case .camera:
            imagePicker.sourceType = .camera
        case .photoLibrary:
            imagePicker.sourceType = .photoLibrary
        }
        present(imagePicker, animated: true, completion: nil)
    }

    //MARK: - Saving Image here
    @IBAction func save(_ sender: AnyObject) {
        guard let selectedImage = imageTake.image else {
            print("Image not found!")
            return
        }
        UIImageWriteToSavedPhotosAlbum(selectedImage, self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)
    }

    //MARK: - Add image to Library
    @objc func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
        if let error = error {
            // we got back an error!
            showAlertWith(title: "Save error", message: error.localizedDescription)
        } else {
            showAlertWith(title: "Saved!", message: "Your image has been saved to your photos.")
        }
    }

    func showAlertWith(title: String, message: String){
        let ac = UIAlertController(title: title, message: message, preferredStyle: .alert)
        ac.addAction(UIAlertAction(title: "OK", style: .default))
        present(ac, animated: true)
    }
 }

 extension ViewController: UIImagePickerControllerDelegate{

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]){
        imagePicker.dismiss(animated: true, completion: nil)
        guard let selectedImage = info[.originalImage] as? UIImage else {
            print("Image not found!")
            return
        }
        imageTake.image = selectedImage
    }
}

How can I save an image to the camera roll?

You use the UIImageWriteToSavedPhotosAlbum() function.

//Let's say the image you want to save is in a UIImage called "imageToBeSaved"
UIImageWriteToSavedPhotosAlbum(imageToBeSaved, nil, nil, nil);

Edit:

//ViewController.m
- (IBAction)onClickSavePhoto:(id)sender{

    UIImageWriteToSavedPhotosAlbum(imageToBeSaved, nil, nil, nil);
}

Save a photo to a folder in photo library

First you need to create a folder:

ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];

[library addAssetsGroupAlbumWithName:folderName 
                              resultBlock:^(ALAssetsGroup *group) 
{
         NSLog(@"Added folder:%@", folderName);
}
                             failureBlock:^(NSError *error) 
{
         NSLog(@"Error adding folder");
}];

Then, find the folder:

__block ALAssetsGroup* folder;

[library enumerateGroupsWithTypes:ALAssetsGroupAlbum
                             usingBlock:^(ALAssetsGroup *group, BOOL *stop) 
{
      if ([[group valueForProperty:ALAssetsGroupPropertyName] isEqualToString:folderName]) 
      {
          folder = group;
      }
}
                           failureBlock:^(NSError* error) 
{
    // Error handling.    
}];

And add your photo to it.

Save the Image to Asset Library, and put it into the album:

[library writeImageToSavedPhotosAlbum:yourImage
                                  metadata:[info objectForKey:UIImagePickerControllerMediaMetadata]
                           completionBlock:^(NSURL* assetURL, NSError* error) 
{
     if (error.code == 0) 
     {
         // Get the asset
         [library assetForURL:assetURL
                  resultBlock:^(ALAsset *asset) 
         { 
              // Assign the photo to the album
              [folder addAsset:asset];
         }
                      failureBlock:^(NSError* error)
         {
              // Error handling.
         }];
     }
     else 
     {
         // Error handling.
     }
 }];

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