UIScrollView in UIPopoverController - ios

Question

I am struggling to enable zooming in a UIPopoverController using a UIScrollView. The scrollView is 600x600 and it should display a view controller that displays a UIImageView. The image appears except it's not centered.
This is the code from the viewDidLoad method in the view controller that is displayed in the popover.
- (void)viewDidLoad {
self.imageView = [[UIImageView alloc] init];
self.imageView.contentMode = UIViewContentModeScaleAspectFit;
self.imageView.image = self.image;
self.scrollView = [[UIScrollView alloc] init];
self.scrollView.backgroundColor = [UIColor greenColor];
[self.scrollView setContentSize:self.imageView.image.size];
[self.scrollView setDelegate:self];
[self.imageView setFrame:CGRectMake(0, 0, 600, 600)];
self.view = self.scrollView;
[self.scrollView addSubview:self.imageView];
// Do any additional setup after loading the view.
}
The UIScrollView and UIImageView are declared as properties inside the UIViewController that's displayed in the popover. image is another property that is set to point to an image when the UIViewController is created.
This is what is looks like.
I would like to center the image in the popover and make it fit. How can I do that? Thanks.

Answer 1

what you need to do is:
first:
in your uiviewcontroller which is presented as a popover
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
preferredContentSize = CGSize(width: collectionPreference.bounds.width, height: collectionPreference.bounds.height)
println("I am appearing?")
}
then from the viewcontroller that is presenting the popover:
make it conform to UIPresentationStyleForPresentingController protocol,
and implement this two things:
number one:
func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {
return UIModalPresentationStyle.None
}
number two: in your prepareforsegue method:
if let identifier = segue.identifier {
if identifier == "segueToYourPopoverVC" {
if let pVC = segue.destinationViewController as? YourPopoverVC {
let ppc = pVC.popoverPresentationController
ppc?.delegate = self
}
}
}
best of luck