Opening new view on button click - objective-c

Question

I have a Navigation based Application named as diffView and in it I want to open new view on button click. For this a have created a view as file-new file-cocoa touch class-UIViewControllerSubclass named next1.
In diffViewAppDelegate.h I wrote as
IBOutlet UIButton *btn1;
#property (nonatomic,retain) UIButton *btn1;
-(IBAction)buttonPressed:(id)sender;
and in diffViewAppDelegate.m-
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
CGRect bounds=window.bounds;
UIView* view=[[UIView alloc]initWithFrame:bounds];
[view setBackgroundColor:[UIColor redColor]];
[window addSubview:view];
CGRect buttonFrame= CGRectMake(80, 240, 200, 30);
btn1=[[UIButton alloc] initWithFrame:buttonFrame];
[btn1 setTitle:#"space" forState:UIControlStateNormal];
[btn1.titleLabel setFont:[UIFont fontWithName:#"Verdana" size:20]];
[btn1 addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchDown];
[view addSubview:btn1];
[self.window makeKeyAndVisible];
return YES;
}
-(IBAction)buttonPressed:(id)sender
{
next1 * nxt=[[next1 alloc] initWithNibName:nil bundle:nil];
[self.navigationController pushViewController:nxt animated:YES];
[nxt release];
}
I am not getting any error but when I click on the button nothing happens.
Please suggest me any solution.

Answer 1

Yes I have created the button in RootViewController but its not working.Even the button is not visible now. My code is like this-
CGRect buttonFrame= CGRectMake(80, 240, 200, 30);
btn1=[[UIButton alloc] initWithFrame:buttonFrame];
[btn1 setTitle:#"space" forState:UIControlStateNormal];
[btn1.titleLabel setFont:[UIFont fontWithName:#"Verdana" size:20]];
[btn1 addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchDown];
[self.view addSubview:btn1];

Answer 2

How i imagine it:
In your delegate you load - alloc/init the UINaviagationController and set its rootViewController property or just using initWithRootViewController: method when you init the NavigationController. Something like that.
viewController = [RootViewController alloc] init];
nvc = [[UINavigationController alloc] initWithRootViewController:viewController];
nvc.navigationBarHidden = YES;
[self.window setRootViewController:nvc];
[window makeKeyAndVisible];
In your RootViewController, from 'viewDidLoad:' method you create the button and add it to 'self.view' after that you implement the target selector and everything will be fine.
EDIT 1:
That is my application:didFinishLaunchingWithOptions: method in my AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.viewController = [[[ViewController alloc] init] autorelease];
self.navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
return YES;
}
That is my RootViewController
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
CGRect buttonFrame= CGRectMake(80, 240, 200, 30);
UIButton *btn1=[[UIButton alloc] initWithFrame:buttonFrame];
btn1.backgroundColor = [UIColor greenColor];
[btn1 setTitle:#"space" forState:UIControlStateNormal];
[btn1.titleLabel setFont:[UIFont fontWithName:#"Verdana" size:20]];
[btn1 addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn1];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)buttonPressed:(id)sender
{
NSLog(#"sender: %#", sender);
}
#end