ScrollView

In the APP is first started calling SCrollView, lead you to the application.

UIPageControl

//user can't clic
pc.userInteractionEnabled = NO;

UIScrollViewDelegate

-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
  CGPoint offset = scrollView.contentOffset;    self.pc.currentPage = round(offset.x / scrollView.bounds.size.width); }

instructions

在图片上，添加跳转按钮时，要设置与用户交互
imageV.userInteractionEnabled = YES;