Question

I was digging around on SO and thought I had figured out how to do this but my test failed. I’m trying to close a popovercontroller from the viewcontroller that is launched/contained (I’m still a bit fuzzy on the poc and vc relationship) by it.

In my viewcontroller .h I have this:

@interface OAI_vcOperatingRooms : UIViewController {

    OAI_ColorManager* colorManager;
    OAI_FileManager* fileManager;

    UIPopoverController* myPopOverController;

}

@property (nonatomic, weak) UIPopoverController* myPopOverController;

- (void) closeVC : (id) sender;

and in the .m file

UIButton* btnClose = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [btnClose addTarget:self 
               action:@selector(closeVC:)
     forControlEvents:UIControlEventTouchDown];
    [btnClose setTitle:@"Close" forState:UIControlStateNormal];
    btnClose.frame = CGRectMake(10.0, 210.0, 160.0, 40.0);

    [self.view addSubview:btnClose];

- (void) closeVC : (id) sender {

    [myPopOverController dismissPopoverAnimated:YES];
}

in the uiview that calls the popovercontroller, I’ve referenced the viewcontroller and added this:

//operating rooms
        controller2 = [[OAI_vcOperatingRooms alloc] initWithNibName:@"OAI_vcOperatingRooms" bundle:nil];
        popoverController2 = [[UIPopoverController alloc] initWithContentViewController:controller2];

        controller2.myPopOverController = popoverController2; 

No errors but nothing happens when I hit the close button. Is it possible to reference a POC from within the VC?

Thanks

Answer 1

I believe ott’s comment is on to something – try using a strong property instead of a weak one. A weak property is likely to get set to nil by ARC immediately after its last use. A strong property will stick around for the lifetime of its parent object (in this case, your UIViewController subclass), unless you set it to nil early.

Note: you probably don’t need UIPopoverController *myPopOverController; in your interface, since Xcode will automatically generate _myPopOverController as a backing variable.