Question

I have a TableViewCell that I want to blink when it’s tapped (ie quickly highlight off and on a couple of times).

So far I’ve implemented this functionality with a timer as follows:

-(void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
      NSTimer *blinkTimer = [[NSTimer scheduledTimerWithTimeInterval:.05 target:self selector:@selector(toggleHighlightedMenuCell) userInfo:nil repeats:YES] retain];
      self.blinkTimer = blinkTimer;
      [blinkTimer release];
} 

-(void) toggleHighlightedMenuCell
{
    if (self.highlightedMenuCell.isHighlighted)
    {
        self.highlightedMenuCell.highlighted = NO;
    }
    else 
    {
        self.highlightedMenuCell.highlighted = YES;        
    }

    self.blinkTimerCounter++;

    if (self.blinkTimerCounter == 2)
    {
        self.blinkTimerCounter = 0;
        [self.blinkTimer invalidate];

        //execute some code
    }
}

The problem with this is it seems to start executing the code in the //execute some code section before it’s finished blinking. Can anyone think of a better way to accomplish this?

Answer 1

Ended up chaining some UIView animations together it ended up working perfectly:

-(void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
            [UIView animateWithDuration:.05 delay:0 options:0 animations:
            ^{
                self.highlightedMenuCell.highlighted = !self.highlightedMenuCell.highlighted;
             }
             completion:^(BOOL finished)
             {
                [UIView animateWithDuration:.05 delay:0 options:0 animations:
               ^{
                   self.highlightedMenuCell.highlighted = !self.highlightedMenuCell.highlighted;
                }
                completion:^(BOOL finished)
                {
                    if ([self.menuViewDelegate respondsToSelector:@selector(menuView:didSelectMenuItem:viaTouchType:)])
                    {
                        [self.menuViewDelegate menuView:self didSelectMenuItem:self.highlightedMenuCell.menuItem viaTouchType:TouchTypeTouchUpInside];
                    }
                }];
            }];
}