Maintain variables in iPhone development across multiple views

[masumbuet]

Hello,

I need to use some variables in multiple views. I have different .m files for different Views.

 

I kept the variables in AppDelegate that will be used in different Views. Whenever I need any of them I create a pointer to AppDelegate using sharedApplication method, and access that variable through the AppDelegate pointer (using dot (.) operator). Is it fair? Or there is a better approach? If there is a better approach, please describe it. Is my approach creating any cyclic reference (Since, AppDelegate has a pointer to a View object which is creating pointer to AppDelegate to access to another View instance)? Let me give an example,

 

AppDelegate.h

 #import "View1.h"
#import "View2.h"

@interface AppDelegate : NSObject <UIApplicationDelegate>{
 View1* v1;
 View2* v2;
}

 

View2.cpp

 #import "AppDelegate.h"
-(void) someMethod{
 AppDelegate *appDel = (AppDelegate *) [[UIApplication sharedApplication] delegate];
 [appDel.v1 someMethodOfView1];
}