Question

I want to set image from UIImageView.image to my bar button. The bar button works fine when i set the image giving it’s name (eg. @”cameraImageButton.png”), however when i do myBarButton.image = UIImageView.image (and this UIImage exists, consist same @”cameraImageButton.png”) the button doesn’t show up.

Here is the code that doesn’t work:

UIBarButtonItem *cancelBarButton = [[ UIBarButtonItem alloc ] initWithTitle: @"Cancel" style: UIBarButtonItemStyleBordered target: self action: @selector(done)];
cancelBarButton.image = cancelImageView.image;

And here is the one that works (but i want to set image from cancelImageView):

UIBarButtonItem *saveBarButton = [[ UIBarButtonItem alloc ] initWithTitle: @"Save" style: UIBarButtonItemStyleBordered target: self action: @selector(takePhoto)];
saveBarButton.image = [UIImage imageNamed:[NSString stringWithFormat:@"cameraImageButton.png"]];

//init for flexItem and cancelBarButton

NSArray *items = [NSArray arrayWithObjects: cancelBarButton, flexItem, saveBarButton, nil];
[cameraToolbar setItems:items animated:NO];

Answer 1

UIImageView.image is a property not an object. It is @property(nonatomic, retain) UIImage *image in UIImageView class and also in UIBarButtonItem Class. Only object or nil can be passed to set the property.