Question

iPhone n00b here, although I do have an app in the store.

I have two simple ViewControllers, taken directly from the Utility Application template in xCode. I have two UIImageViews, one on each ViewController in a storyboard. I have the outlets hooked up correctly (as far as I know) because I can set the image of the first ViewController fine with

[self.imageView setImage:@"test.png"]

When I try to do essentially the same thing in my FlipsideViewController, nothing happens.

- (void)selectImage:(UIImage *)img
{
    NSLog(@"%@", img);
    self.editImageView.image = img;
    NSLog(@"%@", self.editImageView.image);
}

This code, gives the correct result after logging the first NSLog statement, but the second line does not have the desired effect, and the third line yields (null).

EDIT: the coed is updated to reflect the fact that I want to display “img” rather than another image initialized using imageNamed, that was simply a test.

Answer 1

If you’re passing a UIImage to your method, why are you then setting the imageView via the imageNamed: function?

If you’re passing the correct UIImage then you should just do the following.

- (void)selectImage:(UIImage *)img
{
    NSLog(@"%@", img); // This is the UIImage being passed.
    [self.editImageView setImage:img];
    NSLog(@"%@", self.editImageView.image);
}

From what I can see that is all that is needed. If this is wrong, please update your question so I can answer accordingly.

Edited due to comments

So, from the comments I have gathered what the issue is.

You’re saying that in -(void)viewDidLoad you can set the image, that is easy, with the [UIImage imageNamed:] method. That’s fine, but you want to do it in a separate method which is causing the issue.

What I’d suggest is doing the following, for testing sakes.

 - (void)viewDidLoad
 {
      [super viewDidLoad];
      // Do any additional setup after loading the view from its nib.

      UIImage *imageYouWantToPass = [UIImage imageNamed:@"test.png"];
      [self selectImage:imageYouWantToPass];

 }

Make sure that the method selectImage: is added to your .h file so that you don’t get any warnings. I think this is what the answer is, but if this still doesn’t resolve your question please provide more information.