gistfile1.mm

@synthesize pageIndex = _pageIndex;

- (id) initWithParent:(UIView *)parent {
  self = [super initWithParent:parent];
  if (self == nil) {
    return nil;
  }
  self.userInteractionEnabled = YES;
  self.size = self.window.size;
  [[UIImageView viewWithParent:self] setImageWithName:@"dailies"];
  self.pageIndex = 0;
  return self;
}

- (void)setPageIndex:(int)index {
  if (index < 0 || index >= [self.subviews count]) {
    return;
  }
  _pageIndex = index;
  for (int i = 0; i < [self.subviews count]; i++) {
    UIImageView *page = [self.subviews objectAtIndex:i];
    page.x = (i < _pageIndex) ? -self.width : (i > _pageIndex) ? self.width : 0;
  }
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
  self.pageIndex++;
}