UIButton target not recognized when adding button superview controller to another viewController - iphone

Question

I created a sub-class of UIViewController called toolbarViewController , I declare a UIButton in this view controller and specified it's target as following
UIButton *button = [[UIButton alloc]initWithFrame:myFrame];
[button addTarget:self action:#selector(doSomething) forContorlEvents:UIControlEventTouchUpInside];
then i do the following in a different view controller
toolbarViewController *toolbar = [[toolbarViewController alloc]init];
[self.view addSubview:toolbar.view];
the problem is that when i press the button i get the exception: Unrecognized selector ( doSomething ) send to instance , what am i doing wrong here ?
doSomething declaration in toolbarViewController.h
-(void)doSomething;
and in toolbarViewController.m
-(void)doSomething{ NSLog("doSomething got called"); }

Answer 1

Check the declaration of doSomething. If you declare IBAction something like -(IBAction)doSomething:(id)sender, you should add selector like
[button addTarget:self action:#selector(doSomething:) forContorlEvents:UIControlEventTouchUpInside];
instead of
[button addTarget:self action:#selector(doSomething) forContorlEvents:UIControlEventTouchUpInside];

Answer 2

if you use ARC，you alloc toolbarViewController，but it has relese。you can try to this:
ViewController.h
#interface ViewController : UIViewController{
toolbarViewController * toolbar;
}
#property(nonatomic,strong) toolbarViewController * toolbar;
ViewController.m
#synthesize toolbar = _toolbar;
toolbar = [[toolbarViewController alloc]initWithNibName:#"toolbarViewController" bundle:[NSBundle mainBundle]];
and you alloc button can do this:
UIButton *bt = [UIButton buttonWithType:UIButtonTypeRoundedRect];
bt.frame = myFrame;
[bt addTarget:self action:#selector(dosomething) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:bt];

Answer 3

One possible case is if you add a UITapGestureRecognizer to the UIButton's superview.
On iOS5 it seems there is an issue with UITapGestureRecognizers that do not cancel the tap in view.
So all you need to do is set the
tapGesture.cancelsTouchesInView = NO;
let me know if it helped!