Question

Implemented some barbuttons by using below code,

UISegmentedControl *button = [[[UISegmentedControl alloc] initWithItems:
    [NSArray arrayWithObjects:@"", nil]] autorelease];
button.momentary = YES;
button.segmentedControlStyle = UISegmentedControlStyleBar;

UIBarButtonItem *barButton = [[[UIBarButtonItem alloc] initWithCustomView:button] autorelease];

I used set action for the button using this code,

[button addTarget:self 
           action:@selector(drawOnImageByColor:) 
 forControlEvents:UIControlEventTouchUpInside];

Answer 1

Change like this

[button addTarget:self 
           action:@selector(drawOnImageByColor:) 
 forControlEvents:UIControlEventValueChanged];