I dont see from your question how you retrieved the title on your button, make sure you are using:
NSString *strTitleOnButton = [button titleForState:UIControlStateNormal];
But better use selected property of your UIButton to know if pressed unpressed for example:
- (IBAction)buttonClicked:(UIButton *)sender
{
if (sender.selected)
{
//Already Pressed
}
else
{
//Unpressed
}
sender.selected.toggle()
}