Pass an int between a view and it's subview

Question

I have a view called PatternsViewController and a subview named SolutionsViewController. I want to pass a variable in PatternsViewController named iteration to my SolutionsViewController, right before I present it with

solutions = [[SolutionsViewController alloc] init];
solutions.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
 [self presentModalViewController:solutions animated:YES];

thanks in advance,
wft

Answer 1

solutions = [[SolutionsViewController alloc] init];
solutions.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;

// Set your value here
[solutions setMyIntWithSomeMethodIWrote:123];

[self presentModalViewController:solutions animated:YES];

And in SolutionsViewController

- (void)setMyIntWithSomeMethodIWrote:(int)value {
    myInstanceVar = value;
}

Answer 2

I would use a Singleton class.

http://stackoverflow.com/questions/145154/what-does-your-objective-c-singleton-look-like

Then you can do like:

[SingletonClass sharedInstance].var = iteration;

And access it with:

[SingletonClass sharedInstance].var

Answer 3

I figured it out by slightly modifying Squeegy's code.

In PatternsViewController.m

[solutions setIteration:iteration];

and in SolutionsViewController.m

    -(void) setIteration:(int)value {
 iteration = value;
 NSLog(@"Iteration set from value: %d" , iteration);
}

Thanks again,
Squeegy

Answer 4

Why not simply over-ride the init with an additional argument that take the int you want to set? This allows a clean instantiation without an added set call.

solutions = [[SolutionsViewController alloc] initWithIntVal: int];