ios - Passing data forward with delegate protocol -

i'm trying pass data forward viewa viewb using delegate. reason trying use delegate viewb slide out menu - using swrevealviewcontroller library function. side effect - prepareforsegue not called viewa not own viewb.

so seemed delegates way forward.

the problem delegate method not called.

in viewb - added method gets called when pan gesture happens - opens side menu.

so did:

in viewa declared protocol:

@protocol firstviewcontrollerdelegate <nsobject> (void)senddata:(nsstring *)string; @end 

declared in viewa

@property (nonatomic, assign) id <firstviewcontrollerdelegate> delegate; 

then in pan gesture in viewa

-void)pangesturestarted:(uipangesturerecognizer *)gesture{  if (gesture.state == uigesturerecognizerstatebegan){      nsstring *datatopass = @"test sending data second view";     [self.delegate senddata:datatopass];  } 

then in viewb:

#import "viewacontroller.h" 

conformed protocol

@interface bbfilterviewcontroller : uiviewcontroller < firstviewcontrollerdelegate> 

then in viewb.m

- (void)viewdidload{  [super viewdidload];   viewaviewcontroller *viewa = [[viewaviewcontroller alloc] init]; viewa.delegate = self;}    -(void)senddata:(nsstring *)string{ nslog(@"data viewa %@",string);} 

the problem in viewb.m method: -(void)senddata:(nsstring *)string never called. doing wrong here?

this code:

viewaviewcontroller *viewa = [[viewaviewcontroller alloc] init]; viewa.delegate = self; 

creates new instance of viewaviewcontroller, sets delegate , destroys it. instead of creating new instance never gets used (its view never displayed) should finding existing instance , connecting that.

in case, using sliding view controller front view controller.

in case delegation isn't best approach relationship sounds backwards. you're looking viewa pass data viewb , can directly when provided information sliding controller (which has). viewa not in same place necessarily, whereas viewb is.

so, viewb , send message directly it:

viewbviewcontroller *viewb = (viewbviewcontroller *)[(uinavigationcontroller *)self.revealviewcontroler.rightviewcontroller topviewcontroller];  [viewb ...]; 

(casts required because methods return superclass pointers , need call subclass specific methods, applied both nav controller , view b controller)