Need help programmatically setting a UIImageVIew Image

Question

I want to do is set the image of an empty UIImageView but whatever I try, nothing seems to work. Sorry if this is stupid, I am new to Xcode and Obj-C. The UIImageView takes up whole of the view, and there is a button to load the image (I have also tried putting this in the viewDidLoad bit, no success). Here is the code from my ViewController.m:

- (IBAction)buttonChangeImage:(id)sender {
    UIImage *image = [UIImage imageNamed:@"1.jpg"];
    [_imageView setImage:image];
}

Thanks in advance

Put a breakpoint and check that image is not nil and _imageView is not nil. If image is nil verify if 1.jpg is in the target. If _imageView is nil check the outlet connection. — djromero, Apr 27 '14 at 18:49
Thanks it is working now (after a lot of trying!). imageView was nil and fixing it was as simple as redoing the outlet. Thanks! — user3578956, Apr 27 '14 at 19:11

score 2 · Accepted Answer · answered Apr 27 '14 at 18:50

2

Probably you did not connect IBOutlet _imageView with imageView in XIB or Storyboard.

answered Apr 27 '14 at 18:50

Sergey Neskoromny

1,188
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It was as simple as a broken outlet connection, thanks – user3578956 Jul 05 '14 at 21:58

score 1 · Answer 2 · answered Apr 27 '14 at 18:52

Just in case you're having trouble interpreting @djromero's comment, here's how you could see if your problem is with the image:

- (IBAction)buttonChangeImage:(id)sender {
    UIImage * imageToAdd = [UIImage imageNamed:@"1.jpg"];
    if (imageToAdd) {
        _imageView.image = imageToAdd;
        NSLog(@"Image exists, if still not working, make sure _imageView is set properly");
    }
    else {
        NSLog(@"There was a problem loading your image, make sure it is named properly");
    }

    if (_imageView) {
        NSLog(@"ImageView exists!");
    }
    else {
        NSLog(@"ImageView does not exist, make sure it is properly connected");
    }
}

Except you're missing the crucial part: checking that `_imageView` is not `nil`. — neilco, Apr 27 '14 at 18:54

Need help programmatically setting a UIImageVIew Image

2 Answers2