Custom UIStoryboardPopoverSegue wont work under iOS 5.1 - ios

Question

I've implemented a custom story board segue which is working fine under iOS 6 but nothing happens in the simulator under iOS 5.1.
The problem is that the popoverController is always nil under iOS 5.1?!
#implementation PopoverFromRectSegue
-(id)initWithIdentifier:(NSString *)identifier
source:(UIViewController *)source
destination:(UIViewController *)destination {
if(self = [super initWithIdentifier:identifier
source:source
destination:destination]) {
}
return self;
}
- (void)perform {
UIPopoverController *popCtrl = ((UIStoryboardPopoverSegue *)self).popoverController;
id controller = [self sourceViewController];
if ([controller isKindOfClass:[UIViewController class]] && [controller respondsToSelector:#selector(popoverRect)]) {
[popCtrl presentPopoverFromRect:[[controller performSelector:#selector(popoverRect)] CGRectValue] inView:[controller view] permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
}
#end
Any help/hint is appreciated.
Edit:
Just made new sample project. It seems that under iOS5.1 the popoverController is not set
for custom UIStoryBoardSegues.
What else can I do.
The normal popover requires an anchor but a prototype tableView cells is not accepted (failure during compile) and I couldn't find a way to modify the rect the popover is presented from.

Answer 1

Here's my workaround.
PopoverFromRectSegue.h
#interface PopoverFromRectSegue : UIStoryboardPopoverSegue
#property (strong, nonatomic) UIPopoverController *popoverCtrl;
#end
PopoverRectFromSegue.m
#import "PopoverFromRectSegue.h"
#implementation PopoverFromRectSegue
- (void)perform
{
UIPopoverController *popCtrl = ((UIStoryboardPopoverSegue *)self).popoverController;
// under iOS 5.1 the popoverController iVar is not set
// so we have to use our own one
if (nil == popCtrl) {
popCtrl = self.popoverCtrl;
}
id controller = [self sourceViewController];
if ([controller isKindOfClass:[UIViewController class]] && [controller respondsToSelector:#selector(popoverRect)]) {
[popCtrl presentPopoverFromRect:[[controller performSelector:#selector(popoverRect)] CGRectValue] inView:[controller view] permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
}
#end
In my prepareForSegue method I do the following.
if (isPad) {
self.popoverCtrl = [(UIStoryboardPopoverSegue *)segue popoverController];
if (nil == _popoverCtrl) {
self.popoverCtrl = [[UIPopoverController alloc] initWithContentViewController:[segue destinationViewController]];
((PopoverFromRectSegue *)segue).popoverCtrl = _popoverCtrl;
}
self.popoverRect = [NSValue valueWithCGRect:[self.myTableView rectForRowAtIndexPath:indexPath]];
}