Adding array from one view to another and retaining values

I have four views, with four arrays. As 开发者_StackOverflow社区soon as I navigate from one view, I add that particular array to my master array.

Initially this master array has nothing, and is allocated when the app runs using 'init' method. It does not have a view and it is an array from a subclass of NSObject.

Finally the master array should consist of {viewarray1, viewarray2, viewarray3, viewarray4}.

Each array is added to the master array when navigating to the next view.

So is there anything wrong in my implementation ? Is it okay to allocate masterArray in the init method? Each time I add an object to masterArray, I NSLog it and it displays (null)

How can I have the master array retain values for the whole app??

Some Information on the Code:

I initialize my master array in another class, in the -(init) method

masterArray = [[NSMutableArray alloc] init ];

While adding an object to MasterArray from another view, I reference that class, and I create an object for the class, and add it as a property and synthesize it. I then use

[self.thatClassObject.masterArray addObject:self.viewArray1];

---

There are two ways you could go about initializing it that I can think of offhand. First, you could alloc/init the array in the app delegate. This will ensure it's created before the rest of the views get a chance to add to it.

EDIT: There's only really one way I can think to do this as Josh Caswell pointed out a good fact that class initializations won't work for this situation. You're best off calling alloc/init for the array either in the app delegate or whichever view is made key window first. You'll have to reference it to the other classes from there