Question

What function should I implement to return a selected picture from gallery?

Answer 1

Use UIImagePickerController. In this example, I’m using the built-in image cropper as well.

- (void) showImage {
    UIImagePickerController *imagePickerController = [[[UIImagePickerController alloc] init] autorelease];
    imagePickerController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    imagePickerController.delegate = self;
    imagePickerController.allowsEditing = YES;
    imagePickerController.mediaTypes = [NSArray arrayWithObject: (NSString *) kUTTypeImage];
    [self presentModalViewController: imagePickerController animated: YES];
}

- (void) imagePickerController: (UIImagePickerController *) picker didFinishPickingMediaWithInfo: (NSDictionary *) info {
    UIImage *image = [info objectForKey: UIImagePickerControllerEditedImage];
    self.editedImage = image;
    [self dismissModalViewControllerAnimated: YES];
}

- (void) imagePickerControllerDidCancel: (UIImagePickerController *) picker {
    [self dismissModalViewControllerAnimated: YES];
}

This will allow the user to pick an image. If you don’t want the cropping, set imagePickerController.allowsEditing = NO and use the key UIImagePickerControllerOriginalImage to get the resulting image back.