How to attach a UIPopover to a rectangle I have drawn - ios

Question

I have an iPad app (XCode 4.6, ios 6.2, ARC and Storyboards). I have drawn a GCRect on a position of a UIView.
CGRect rectangle = CGRectMake( [appSelected.aPosX floatValue], [appSelected.aPosY floatValue],[appSelected.aPosW floatValue], [appSelected.aPosH floatValue]);
I have a method that does the drawing for me; this is the code for that method:
-(void)showHTMLHelp:(NSString *)htmlString pointTo:(id)target background:(UIColor *)bgColor {
UIViewController* popoverContent = [[UIViewController alloc] init];
UIView* popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 300)];
popoverView.backgroundColor = [UIColor colorWithWhite:(CGFloat)1.0 alpha:(CGFloat)1.0]; // frame color?
popoverContent.view = popoverView;
//resize the popover view shown in the current view to the view's size
popoverContent.contentSizeForViewInPopover = CGSizeMake(200, 300);
// add the UIWebView for RichText
UIWebView *webView = [[UIWebView alloc] initWithFrame:popoverView.frame];
webView.backgroundColor = [UIColor whiteColor]; // change background color here
// add the webView to the popover
[webView loadHTMLString:htmlString baseURL:[NSURL URLWithString:nil]];
[popoverView addSubview:webView];
//create a popover controller
popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
//present the popover view non-modal with a refrence to the button pressed within the current view
if([target isKindOfClass: [UITextField class]])
[popoverController presentPopoverFromRect:((UITextField *)target).frame inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
else if([target isKindOfClass: [UISegmentedControl class]])
[popoverController presentPopoverFromRect:((UISegmentedControl *)target).frame inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
else if([target isKindOfClass: [UIButton class]])
[popoverController presentPopoverFromRect:((UIButton *)target).frame inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
else
[popoverController presentPopoverFromRect:*(CGRect *)CFBridgingRetain(target)
inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
}
Now I want to have a UIPopover point to that rectangle. Since GCRect is a C structure, I can't figure out how to do it. This is what I tried, but obviously it's wrong. How can I do this? This is the code where I call the method to display the popover:
PreferencesViewController *pvc = [[PreferencesViewController alloc] init];
[pvc showHTMLHelp:html pointTo: rectangle background:[UIColor whiteColor]];

Answer 1

There is absolutely no problem with passing a C structure (or C primitive variable) to an Objective-C method. In fact, presentPopoverFromRect:inView:permittedArrowDirections:animated: takes a simple CGRect as you can tell by the header (or the documentation):
- (void)presentPopoverFromRect:(CGRect)rect
inView:(UIView *)view
permittedArrowDirections:(UIPopoverArrowDirection)arrowDirections
animated:(BOOL)animated;
Simply call it like this:
[popoverController presentPopoverFromRect:rectangle
inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
And as Mar0ux already pointed out, it's CGRect, not GCRect. CG stands for Core Graphics.

Answer 2

May i ask you why you are sending an CGRect and casting it to 'id'? Where is the sense?! I would prefer to change your parameter type to CGRect too.
Kind regards.