Mutually Exclusive Toggle Behavior for Segments in UISegmentedContol

Question

Is it possible to deselect a segment of the UISegmentedControl by tapping it the second time? I am currently using a UILongPressGestureRecognizer object to setSelectedSegmentIndex to UISegmentedControlNoSegment . However, I'd rather have the selected segment deselect on the second tap.

Answer 1

Another method is to subclass the UISegmentedControl . For example:

@interface ToggleSegmentedControl : UISegmentedControl
{
   NSUInteger selectedSegment;
}

@end


@implementation ToggleSegmentedControl

-(id)initWithFrame:(CGRect)frame 
{
   if (self = [super initWithFrame:frame])
   {
      selectedSegment = self.selectedSegmentIndex;
   }
   return self;
}

-(void)awakeFromNib 
{
  selectedSegment = self.selectedSegmentIndex;
}

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{

   if( selectedSegment == self.selectedSegmentIndex && selectedSegment!=-1)
   {
     self.selectedSegmentIndex= UISegmentedControlNoSegment; 
     selectedSegment=-1; 
   } 
   else 
  { 
    selectedSegment=self.selectedSegmentIndex;
  }

}

@end

The above code may require further tweaking to suit individual specifications.