Passing a conditional statement when pushing viewControllers using storyboards - ios

Question

Let's say that I have view controller Origin and Destination. I would like to declare something like:
//origin.m file
-(void)pushNextView {
self.conditional = YES;
[self performSegueWithIdentifier:#"toDestination" sender:self];
}
Where I have set my conditional as:
//origin .h file
#propery BOOL conditional;
Now in my Destination view controller I'd like to set a conditional based on the property that I've set in my origin:
// destination .m file
#import "OriginViewController.h"
OriginViewController *origin = [OriginViewController alloc] init];
if (origin.conditional == YES){
self.navigationItem.hidesbackbutton = YES;
}else{
// Do Nothing
}
for some reason this conditional statement does not work. Does this have to do anything with storyboards?

Answer 1

With the setup you seem to have it would be most easy to do this. You could directly access destination.hidesbackbutton when executing the segue:
//in origin.m
-(void) prepareForSegue.... {
if ([segue.identifier isEqualToString: #"identifierString"]) {
DestinationVC *destination = (DestinationVC*)[segue destinationViewController];
destination.hidesbackbutton = self.conditional; //you can set the .hidesbackbutton property here directly, no need for another property, if your setup is just as simple as in the given example
}
}
Like this, the destination doesn't check the origin's state and then set it's state, instead the origin just sets the destination's state.
You can do it both ways, but this way is more common.
Of course hidesbackbutton has to be a public property declared in DestinationVC .h file.
And as already mentioned, it should really be hidesBackbutton Or hidesBackButton.
(This all assumes that the class of your DestinationViewController is called DestinationVC)

Answer 2

Two things: hidesbackbutton looks like there's some camelCase missing. This should at least give a warning, doesn't it?
Also from an architectural point of view, I would not ask for the condition. Pass the state to the destination view controller and implement a BOOL variable there.
Draft:
// origin.m
- (void)prepareForSegue...
{
if([segue.identifier isEqualToString:"yourIdentifier"]) {
[(XYZViewController *)segue.destinationViewController setConditional:YES];
}
}

Answer 3

you should pass the state from your main controller to destination controller where you should handle this View state like and you have to define
//destination.h file
#propery BOOL conditional;
so when you push the controller from main you can set the destination controller view state in
- (void)viewDidLoad
{
[super viewDidLoad];
if (origin.conditional == YES) {
self.navigationItem.hidesBackButton = YES;
} else {
}
}