iOS UIImageView doesn't show anything on iPad - ios

Question

I have a scrollViewController, in viewDidLoad, I add an UIImageView to it:
- (void)viewDidLoad
{
[super viewDidLoad];
[self.scrollView addSubview:self.imageView];
}
Then I set my image:
- (void)setImage:(UIImage *)image
{
self.scrollView.zoomScale = 1.0;
self.imageView.image = image;
self.imageView.frame = CGRectMake(0,0,image.size.width,image.size.height);
self.scrollView.contentSize = self.image ? self.image.size : CGSizeZero;
}
On iPhone, this works fine, but on iPad (SplitViewController Detail), it doesn't show anything.
I think the problem is, that on iPhone ViewDidLoad is called when there is already an image set, on iPad when the app launches, the detail is always on screen.
I tried to put the addSubview to setImage, this works, but when the user clicks another item, the two imageViewControllers overlay each other.
Could anyone help me? Thanks! :-)

Answer 1

The basics:
viewDidLoad is only called once the controller is loaded into memory. So in your SplitViewController the viewDidLoad method is invoked immediately after launching the app.
My suggestion:
Add a UIImageView from InterfaceBuilder and connect it to your controller using a IBOutlet. This is the easiest way to reach the goal. I assume you're using a storyboard?!
right click drag the outlet to your header:
enter a name for your property and click connect
This way you can access your UIImageView in your implementation and you're good to go. No need to add it programmatically.
For further informations have a look at this tutorial: http://klanguedoc.hubpages.com/hub/IOS-5-A-Beginners-Guide-to-Storyboard-Connection

Answer 2

Before adding second imageViewController, you should remove first imageViewController
Try this:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//_imageView variable is created by outlet, or you can do it by programmatically
_imageView.image = [UIImage imageNamed:#"1"];
}
- (void) setNewImage
{
[_imageView removeFromSuperview];
_imageView.image = [UIImage imageNamed:#"2"];
}