UIButton not working inside UIScrollView - objective-c

Question

I have a scrollview in which i am creating buttons programmatically. On touch, button is supposed to load another nib. The problem is, on touch, i am getting
[ViewController buttonTest]: unrecognized selector sent to instance
Let me take you through the code:
appdelegate.h
#interface AppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) UIWindow *window;
#property (strong, nonatomic) UINavigationController *viewController;
appdelegate.m
#import "ViewController.h"
#implementation AppDelegate
#synthesize window = _window;
#synthesize viewController = _viewController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
ViewController *view = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
self.viewController = [[UINavigationController alloc] initWithRootViewController:view];
self.window.rootViewController = self.viewController;
[application setStatusBarHidden:YES withAnimation:UIStatusBarAnimationNone];
[self.window makeKeyAndVisible];
return YES;
}
Viewcontroller.h
#class newView;
#interface ViewController : UIViewController{
UIScrollView * scrollView;
IBOutlet UIButton *btn;
}
- (IBAction)butttonTest:(id)sender;
#property (strong, nonatomic) newView *secondView;
and finally, ViewController.m
- (void)loadView {
CGRect fullScreenRect=[[UIScreen mainScreen] applicationFrame];
scrollView=[[UIScrollView alloc] initWithFrame:fullScreenRect];
scrollView.contentSize=CGSizeMake(320,960);
UIImageView *tempImageView2 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"image.jpeg"]];
UIImage * buttonImage = [UIImage imageNamed:#"contentlist_active.png"];
self.view=scrollView;
[scrollView addSubview:tempImageView2];
scrollView.userInteractionEnabled = YES;
btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(22, 100, 277, 32);
[btn setBackgroundImage:buttonImage forState:UIControlStateNormal];
[btn setTitle:#"hello world" forState:UIControlStateNormal];
[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[btn addTarget:self action:#selector(buttonTest:) forControlEvents:UIControlEventTouchUpInside];
[scrollView addSubview:btn];
}
To load the view, I have code:
[btn addTarget:self action:#selector(buttonTest) forControlEvents:UIControlEventTouchUpInside];
What am i doing wrong?
OH yes, here is the method for buttenPressed
- (IBAction)butttonTest:(id)sender {
self.secondView = [[newView alloc] initWithNibName:#"newView" bundle:nil];
[self.navigationController pushViewController:self.secondView animated:YES];
}

Answer 1

your method is called - (IBAction)butttonTest:(id)sender.
Three t and a parameter.
But your selector is #selector(buttonTest). Two t and no parameter.
The two method signatures just don't match.
change the addTarget:action:forControlEvents: call like this:
[btn addTarget:self action:#selector(butttonTest:) forControlEvents:UIControlEventTouchUpInside];
or remove the third t on both.

Answer 2

Have you implemented the buttonTest: method (as i dont see it in the code above)?

Answer 3

Try this:
[btn addTarget:self action:#selector(buttonTest:) forControlEvents:UIControlEventTouchUpInside];
Note buttonTest: rather than buttonTest.