ios - Setting BOOL to "YES" in custom delegate -

i've make delegate 2 different view controllers can communicate , i'm stuck trying set bool yes in child view controller.

childviewcontroller.h

@protocol pagetwoviewcontrollerdelegate;  @interface pagetwoviewcontroller : uiviewcontroller { uibutton *takephototransition; } @property (nonatomic, weak) id<pagetwoviewcontrollerdelegate> delegate;  @end  @protocol pagetwoviewcontrollerdelegate <nsobject>  - (bool)didpushtakephoto;  @end 

childviewcontroller.m

... - (ibaction)takephototransition:(id)sender {  id<pagetwoviewcontrollerdelegate> strongdelegate = self.delegate;  if ([strongdelegate respondstoselector:@selector(didpushtakephoto)]) {     strongdelegate.didpushtakephoto = yes; // error: no setter method 'setdidpushtakephoto:' assignment property } nslog(@"button push recieved"); } 

how can past error , set bool yes when button pushed?

you getting confused between method , property.

the definition of protocol "pagetwoviewcontrollerdelegate", says should implement method name "didpushtakephoto" returns bool value.

what trying entirely different. trying set non-existent property. whenever accessing followed dot ".", should property of class object belongs. protocol defined not talk property.

so inside if condition, should calling method "didpushtakephoto" on delegate object, below. [strongdelegate performselector:@selector(didpushtakephoto)];

if know sure delegate implementations have protocol method implemented, since cast self.delegate strongdelegate declared id, don't need if condition. directly call method below. [strongdelegate didpushtakephoto];

hope helps