MonoTouch - How do I declare UIPopoverController only when using an iPad device? - iphone

Question

As I understand from reading documentation, UIPopoverControllers are only supported on the iPad. Therefore if you try to declare a variable as a UIPopoverController and run the app in the iPhone simulator or on an iPhone, you get an error such as:
UIPopoverController initWithContentViewController:] called when not running under UIUserInterfaceIdiomPad
So I have a universal monotouch app I am trying out, where I would like to use a UIPopoverController when the user is using an iPad, for the iPhone I have another solution.
This is how I am declaring it at the moment, but obviously running on the iPhone does not work, and I get the above error message.
public partial class IOPSCalculatorViewController : UIViewController
{
static bool UserInterfaceIdiomIsPhone {
get { return UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone; }
}
static bool UserInterfaceIdiomIsIPAD {
get { return UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad; }
}
UIPopoverController DetailViewPopover = new UIPopoverController(new PopoverContentViewController());
}
How can I only declare the:
UIPopoverController DetailViewPopover = new UIPopoverController(new PopoverContentViewController());
part if the device is an iPad? I need the UIPopoverController to be in the public partial class so that I can access it publically in other places.

Answer 1

Instead of declaring and allocating in one line just split it in two lines. E.g.
UIPopoverController DetailViewPopover = null;
if (IOPSCalculatorViewController.UserInterfaceIdiomIsIPAD) {
DetailViewPopover = new UIPopoverController (new PopoverContentViewController ());
}
That will also work if DetailViewPopover is a (public) field instead of an instance variable and, as long as the UIPopoverController constructor is not invoked, you won't be getting the error.

Answer 2

You need to find out what is your current device and write code for iphone and iPad as well. here is a snap of code that I've used in my case.
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
{
//Do your coding here
}
else {
if(![popoverController isPopoverVisible]){
contact = [[[ContactViewController alloc] initWithNibName:#"ContactViewController_iPad" bundle:nil] autorelease];
popoverController = [[[UIPopoverController alloc] initWithContentViewController:contact] retain];
[popoverController setPopoverContentSize:CGSizeMake(400.0f, 400.0f)];
[popoverController presentPopoverFromRect:CGRectMake(230, 860, 320.0f, 320.0f) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];
[popoverController release];
}else{
[popoverController dismissPopoverAnimated:YES];
}
}
hope this will help you. Happy Coding!!!