实现UIPageControl垂直滚动

Question

我正在尝试使用垂直滚动创建UIPageControl。默认情况下，您只能在水平方向上滑动，但如何将其向上滑动？

这是我的代码：

#pragma mark page control setup

- (void)setupPageScroll {
    _pageControl.transform = CGAffineTransformMakeRotation(M_PI /2 );
    _pageControl.currentPage = 0;
    _pageControl.numberOfPages = 3;
    [_scrollView setContentSize:CGSizeMake(_scrollView.frame.size.width * _pageControl.numberOfPages, _scrollView.frame.size.height)];
    _scrollView.delegate = self;
    [self createPageWithView:_tower1 forPage:0];
    [self createPageWithView:_tower2 forPage:1];
    [self createPageWithView:_tower3 forPage:2];
}

- (void)createPageWithView:(UIView *)iview forPage:(int)page
{
    UIView *newView = [[UIView alloc] initWithFrame:
                       CGRectMake(_scrollView.frame.size.width * page, 0, _scrollView.frame.size.width, _scrollView.frame.size.height)];
    [newView addSubview:iview];
    [_scrollView addSubview:newView];
}

- (IBAction)pageChanged:(id)sender {
    CGRect pageRect = CGRectMake(_pageControl.currentPage * _scrollView.frame.size.width, 0, _scrollView.frame.size.width, _scrollView.frame.size.height);
    [_scrollView scrollRectToVisible: pageRect animated: YES];
}

- (void)scrollViewDidScroll: (UIScrollView *) sView
{
    CGFloat offset = _scrollView.contentOffset.x;
    CGFloat pageSize = _scrollView.frame.size.width;
    int page = floor((offset + (pageSize/2)) / pageSize);
    _pageControl.currentPage = page;
}

Answer 1

如果您正在使用界面构建器，只需将此值设置为用户定义的运行时Atrribute。 它有效。

http://i.imgur.com/USBf2a9.png