Question

So, I’m trying to programmatically attach event handlers to widgets I’ve placed on my iphone application using:

addTarget:action:forControlEvents

I have added a UISegmentedControl in Interface Builder which is exposed through @property seg and in loadView, I have:

- (void)loadView
{
  [ super loadView ] ;

  //k after that attach our own event handlers
  [ seg addTarget:seg action:@selector(sliderEventIB) forControlEvents:UIControlEventAllEvents ];
}

sliderEventIB, just tells us it feels the event:

-(IBAction)sliderEventIB:(id)sender forEvent:(UIEvent*)event
{
  puts( "I feel you joanna" ) ;
}

but the error I’m getting is

ViewControllersTest[6744:207] *** -[UISegmentedControl sliderEventIB]:
unrecognized selector sent to instance 0x3b21b30

Any idea what it doesn’t like here?

Answer 1

It seems like you just forgot to insert the colon in addTarget:


[ seg addTarget:seg action:@selector(sliderEventIB:) forControlEvents:UIControlEventAllEvents ];


It should be sliderEventIB: not sliderEventIB.