iOS iPad UIActionSheet Issue - objective-c

Question

I am currently developing an application which needs an option to 'share' using multiple services; such as email, twitter.
To to this, I have a UIBarButtonItem coded in and when touched, it triggers this:
UIActionSheet *sheet = [[UIActionSheet alloc]
initWithTitle:#""
delegate:self
cancelButtonTitle:nil
destructiveButtonTitle:nil
otherButtonTitles:nil];
[sheet addButtonWithTitle:#"Email"];
[sheet addButtonWithTitle:#"Tweet"];
[sheet addButtonWithTitle:#"Cancel"];
sheet.cancelButtonIndex = sheet.numberOfButtons-1;
[sheet showFromRect:self.view.bounds inView:self.view animated:YES];
[sheet release];
In conjunction with this to detect which button is selected:
clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == actionSheet.cancelButtonIndex) { return; }
switch (buttonIndex) {
case 0:
{
[self emailThis];
break;
}
case 1:
{
[self tweetThis];
break;
}
}
This works a treat on the iPhone. But unfortunately it displays incorrectly on the iPad. It looks like it is trying to display the UIPopoverController, but it is positioned center of the navbar with practically no height.
I have looked into using the UIPopoverController, but I cannot seem to find out how to use it with buttons. Is there anyway I can adapt the code above to properly display the buttons, as it's trying to already.
Many thanks,
Ryan
PS: I'm new to objective-c/iOS coding, so please be specific. Thank you :)
EDIT:
I have tried using:
[sheet showFromBarButtonItem:[self share] animated:YES];
But it doesn't work. Here is my code for the button:
UIBarButtonItem *share = [[UIBarButtonItem alloc]
initWithTitle:#"Share"
style:UIBarButtonItemStyleBordered
target:self
action:#selector(loadShare)];
self.navigationItem.rightBarButtonItem = share;
[share release];
Also here is the code in the .h file:
#interface DetailViewController : UIViewController <UITableViewDelegate, UITableViewDataSource> {
UIBarButtonItem *share;
}
#property (nonatomic, retain) IBOutlet UIBarButtonItem *share;
Here is the debug error:
Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: '* -[__NSPlaceholderArray
initWithObjects:count:]: attempt to insert nil object from objects[0]'

Answer 1

self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:#selector(actionPhotoShare:)] autorelease];
...
-(void)actionPhotoShare:(id)sender
{
actionSheetShare = [[UIActionSheet alloc] initWithTitle:nil
delegate:self
cancelButtonTitle:nil
destructiveButtonTitle:NSLocalizedString(#"ActionSheet_Cancel", #"")
otherButtonTitles:NSLocalizedString(#"ActionSheet_Email", #""),nil];
if (IS_DEVICE_IPAD) {
[actionSheetShare showFromBarButtonItem:sender animated:YES];
}else {
[actionSheetShare showInView:self.view];
}
}

Answer 2

Instead of [sheet showFromRect], use [sheet showFromBarButtonItem], and point it to your Share UIBarButtonItem.
Note: you may need to create an IBOutlet or ivar for your UIBarButtonItem if you don't have one already, but that's extremely simple and I'm guessing you can do that.

Answer 3

Your issue is that you are using showFromRect with the rect being the entire screen. That means the popup is placing the "arrow" the best it can to center on the screen. What you want is either showFromBarButtonItem or pass in the rect (self.shareButtonItem.frame) of the button.