Detect which tab we are in using CAPSPageMenu in objective c - ios

Question

I am using CAPSPageMenu with 2 tabs. Now there is an button at right bar button. When ever i click that i have an view with one button called sayHello. Now when i click that button i needs to know which tab i was in. That bar button is for both tabs.But how can i check which tab was i am when i click on that sayHello.
code :
In my homevc i added that two tabs .
VC1, VC2..
And i tried in viewwillAppear added on bool in nsuserdefault and tried to fetch. But that bool is always coming as TRUE. Which ever tab i am - still the bool values i coming as true.Here is an code :
In vc1
-(void)viewWillAppear:(BOOL)animated {
userDefault = [NSUserDefaults standardUserDefaults];
[userDefault setBool:TRUE forKey:#"fromVC1"]; // Tried true, YES also
NSLog(#"from vc1");
}
In vc2
-(void)viewWillAppear:(BOOL)animated {
userDefault = [NSUserDefaults standardUserDefaults];
[userDefault FALSE forKey:#"fromVC1"]; // Tried false, No also
NSLog(#"from vc1");
}
And i am checking like :
BOOL Val;
userDefault = [NSUserDefaults standardUserDefaults];
Val = [userDefault objectForKey:#"fromVC1"];
if (Val) {
NSLog(#"from VC1");
}else {
NSLog(#"from VC2");
}
But always its coming as True. Any idea how to get that ?Which tab i was i before. when i press my button sayHello.
- (void)didTapGoToLeft {
NSInteger currentIndex = self.pageMenu.currentPageIndex;
if (currentIndex > 0) {
[_pageMenu moveToPage:currentIndex - 1];
}
}
//
- (void)didTapGoToRight {
NSInteger currentIndex = self.pageMenu.currentPageIndex;
if (currentIndex < self.pageMenu.controllerArray.count) {
[self.pageMenu moveToPage:currentIndex + 1];
}
}

Answer 1

if you conform with delegate of CAPSPageMenu, you get the tab with the following two delegate methods.
// Optional delegate
- (void)willMoveToPage:(UIViewController *)controller index:(NSInteger)index {}
- (void)didMoveToPage:(UIViewController *)controller index:(NSInteger)index {}
for e.g
Intially, you nee to tell the compiler that your class implements the protocol:
#interface ViewController : UIViewController<CAPSPageMenuDelegate>
#property (nonatomic) CAPSPageMenu *pagemenu;
thereafter you need to conform the delegate
_pageMenu.delegate = self;
and finally access the delegate as your need.
(void)didMoveToPage:(UIViewController *)controller index:(NSInteger)index {
NSLog(#"controller: %#", controller);
NSLog(#"tabbed Index : %d", index);
}
for step by step intro : https://github.com/PageMenu/PageMenu/blob/master/README.md

Answer 2

I quite agree with the #Anbu.Karthik. Karthik implementation
But I would like to answer that you always get TRUE value when userDefault appears
Because you do not provide a full method context to read the userDefault Value.
So I don't know if it's due to the call life cycle, but if you try to write userDefault methods to viewDidAppear:(BOOL)animated, I'm sure you'll get the expected values.
Schematic code:
- (void)viewDidAppear:(BOOL)animated {
BOOL value;
NSUserDefaults* userDefault = [NSUserDefaults standardUserDefaults];
value = [userDefault objectForKey:#"fromVC1"];
}
I hope I can help you