iPhone: How to Pass Data Between Several Viewcontrollers in a Tabbar App

Question

I have following problem:

I have built a tabbar application with 4 tabs. I want to pass a object/variable from the first tab controller to the third one and initiali

Answer 1

I don't think this is best practice (also check syntax) however I have got away with:

in the .h

otherclassref *otherclassname

@property (assign) otherclassname otherclassref;

and in the .m

@synthesize otherclassref;

then I just assign the reference from somewhere convenient e.g. the app delegate or wherever you are instantiating your viewcontrollers.

then the view controller can get a reference to the other view controller.

I add @class secondviewcontroller to the .h file for the firstviewcontroller and put put the #imports "secondviewcontroller.h" in the .m file of the first view controller. These are called forward references and prevent compiler errors resulting from having .h files referencing each other.