My setup is simple, and my issue is not very different from this one. However to better explain it I have posted it here:
NavController -> VC1 -> VC2
VC1 is root view controller of NavController. VC2 is accessible via Push segue from VC1.
I want to detect, within VC1, whether:
It appeared directly as root view controller (via Push) It appeared as a result of VC2 being popped
I read the docs which says following should tell me if later is true.
isMovingToParentViewController == NO
However that is not the case, and above condition ALWAYS turns out to be TRUE. Which means that, (self.isMovingToParentViewController == NO) is always happening.
Here is my code:
- (void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
self.navigationController.navigationBarHidden = YES;
//pushed to stack
if (self.isMovingToParentViewController == YES)
{
//First time
}
else
//popped off
{
//via Pop from VC2
}
}
Same is the case for viewDidAppear, too.
For a matter of fact check, I put breakpoint at the start, and checked that all of the following are FALSE, in both cases:
([self isMovingFromParentViewController])
([self isMovingToParentViewController])
([self isBeingPresented])
([self isBeingDismissed])
What is happening? Is there anything I goofed up in my storyboard? Please help...
Unfortunately, isMovingToParentViewController isn't true for the root view controller, so I usually handle this situation with a BOOL,
@implementation ViewController {
BOOL isFirstAppearance;
}
- (void)viewDidLoad
{
[super viewDidLoad];
isFirstAppearance = YES;
}
-(void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
if (isFirstAppearance) {
NSLog(@"root view controller is moving to parent");
isFirstAppearance = NO;
}else{
NSLog(@"root view controller, not moving to parent");
}
}