iphone - How to update the UI element of a Class A ie (UIViewController) from another class B ie (UIVIew) -


i trying change background color of class class b view-controller , view type class not able this.

i know there have threading. have tried using performselectoronmainthread method , few more nothing working me.

my code given below-

//  in class b -(void)method{  classaviewcontroller *aview=[[classaviewcontroller alloc]init];     aview.imageindex=self.currentrenderingimageindex;     [aview findindexofimage]; }

now calling class method 

-(void)findindexofimage {    nslog(@"print index %i",imageindex);// working fine    aview.backgroundcolor=[uicolor bluecolor];// here not updating view.  }

i know silly question asked here, please tell me should do.

simply call these lines class b:

baseviewcontroller *objbaseviewcontroller = [[baseviewcontroller alloc]initwithnibname:@"baseviewcontroller" bundle:[nsbundle mainbundle]];     [objbaseviewcontroller firstlink];

baseviewcontroller class name give here class name & firstlink method of class a. give here class method want call.


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