Objective-C giving value on to next View - ios

Question

#import "OtherController.h"
#import "ViewController.h"
ViewController *viewController;
#interface OtherController ()
#end
#implementation OtherController
- (void)viewDidLoad
{
[super viewDidLoad];
viewController = [[ViewController alloc] initWithNibName:#"viewController" bundle:nil];
}
- (IBAction)levelNormal{
viewController.level = 1;
[self.navigationController pushViewController:viewController animated:YES];
}
I have tried various tips i read on stackoverflow though none of them seemed to work out correctly. I am trying to open a View on Button-click and when the View opens, depending on which button was pressed the View should have a different "level" number. I do not have a NavigationController as far as i'm concerned. I have read different posts about pasting code into the AppDelegate class, though that also did not work out for me. When I debug the pressing of the button, I see that the value is changed but nothing else happens when it tries to change the view.
Here's the ViewController header-file:
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController
#property (weak, nonatomic) IBOutlet UIButton *resumeButton;
#property (weak, nonatomic) IBOutlet UIImageView *opacityScreen;
#property (weak, nonatomic) IBOutlet UILabel *scoreField;
#property (weak, nonatomic) IBOutlet UIButton *pauseButton;
#property (weak, nonatomic) IBOutlet UIButton *mainMenuButton;
#property (weak, nonatomic) NSTimer * nst;
#property(nonatomic) int level;
#end

Answer 1

You have to init UINavigationController with root view controller OtherController.
Check this tutorial:
http://www.raywenderlich.com/5138/beginning-storyboards-in-ios-5-part-1

Answer 2

Create UINavigationController object in AppDelegate's didFinishLaunchingWithOptions and assign a UIViewcontroller object as a rootViewController like below and pass the navObj to window root view.
viewController = [[ViewController_iPhone alloc] initWithNibName:#"ViewController_iPhone" bundle:nil];
UINavigationController *navObj = [[UINavigationController alloc] initWithRootViewController:viewController];
[self.window setRootViewController:navObj];

Answer 3

- (IBAction)levelNormal
{
// viewController.level = 1;
OtherController *nextobj=[[OtherController alloc] initWithNibName:#"OtherController" bundle:nil];
nextobj.dictionay_passdata=[your_array_data]; //your data
[self.navigationController pushViewController:nextobj animated:YES];
}
In your OtherController make a dictionary for store data in OtherController
OtherController.h file
{
NSMutableDictionary *dictionay_passdata;
}
OtherController.m file
#implementation OtherController
#synthesize dictionay_passdata; //this is must to write in your code
- (void)viewDidLoad
{
NSLog(#"%#",dictionay_passdata);
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}