objective c - Sharing Property information between classes in Obj C -

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i've been trying share information 1 of classes 1 (trying out spritebuilder) , it's just. not. working.

i want change text of label in second class string define in first. here code.

mainscene.h

@interface mainscene : ccnode @property cclabelttf *lblchange;  -(void) _button;  @end

mainscene.m

#import "mainscene.h" #import "storyscene.h" @implementation mainscene  -(void)_button {     startscene *starthold = [[startscene alloc] init];     [starthold.lbltwo setstring:@"hello world!"];     nslog(@"%@, storyscene", starthold);     nslog(@"%@, main scene", @"yessss");     nsstring *filler = [starthold.lbltwo string];     nslog(@"%@",filler);     ccscene *storyscene = [ccbreader loadasscene:(@"startscene")];     [[ccdirector shareddirector] replacescene: storyscene]; } @end

storyscene.h

#import "ccnode.h"  @interface startscene : ccnode @property cclabelttf *lbltwo;  @end

storyscene.m

#import "storyscene.h" @implementation storyscene @end

i've tried making storyscene property in mainscene class, synthesizing pretty everything, moving things around - cannot dogging lbltwo log anything, prevents label text changing (i think). here relevant output in log. 

thecaveofman[58721:1593076] <startscene = 0x7fc2cfb31e40 | name = (null)>, storyscene 2015-06-18 15:52:04.712 thecaveofman[58721:1593076] yessss, main scene 2015-06-18 15:52:04.712 thecaveofman[58721:1593076] <startscene = 0x7fc2cfb31e40 | name = (null)>, label 2015-06-18 15:52:04.713 thecaveofman[58721:1593076] (null) 2015-06-18 15:52:04.714 thecaveofman[58721:1593076] ccbreader: couldn't find member variable: lbltwo 2015-06-18 15:52:04.725 thecaveofman[58721:1593076] cocos2d: surface size: 640x1136

i don't know why can't find lbltwo variable, , don't know how change storyscene's logging name isn't (null), or how give lbltwo string hold. help?

at second line, try assign "hello world", think lbltwo property might uninitialised (so nil). need alloc , init property before calling setstring on it.


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