Question

I’m using a UIImagePickerController to select an image from my photo album. Once I’ve selected the image, I’m passing the image through to a second view controller and displaying it in a UIImageView. See code below:

First view controller:

- (IBAction)selectPhoto
{
    imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    [self presentModalViewController:self.imagePicker animated:YES];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{    
    UploadViewController *uploadViewController = [[UploadViewController alloc] initWithNibName:@"UploadViewController" bundle:nil];
    [uploadViewController setImage:[info objectForKey:@"UIImagePickerControllerOriginalImage"]];

    [picker pushViewController:uploadViewController animated:YES];
}

Second view controller:

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Set the image view image
    imageView.image = self.image;
}

The code does the job, however, when I push from the image picker to my second view controller, it lags as it’s transitioning.

Ideally I would like a smooth transition but I would be happy if it just waited half a second or something and then moves smoothly.

Can any explain why this could be happening and how/if I can get around it?

Thanks.

Answer 1

The delay is probably from rendering the image, you could try having your UploadViewController’s initial view contain an activity spinner then actually set the image in the viewDidAppear method, this method should be called after the animation is completed.