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我有一个页面控件和一个scrollView在我的一个视图中实现。目前,我有2页,滚动视图的内容大小设置为496(每页248)的宽度。一切正常,因为它更新和滚动正确,但是,我注意到,即使没有页面左侧或右侧,我仍然可以继续滚动。iOS页面控制滚动锁定
如果我在第一页上,或者如果我在最后一页上禁用滚动,有没有办法禁用向左滚动?请看下面的代码片段,看看我在做什么。
// Initialize the scroll view
scrollView.pagingEnabled = YES;
scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * 2, scrollView.frame.size.height);
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.showsVerticalScrollIndicator = NO;
scrollView.scrollsToTop = NO;
scrollView.delegate = self;
// Functions called for the page control/scrollview
- (void)loadScrollViewWithPage:(int)page window:(UIView *)pageView
{
if(page < 0 || page >= pageControl.numberOfPages)
{
return;
}
// Add our view
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
[pageView setFrame:frame];
[scrollView addSubview:pageView];
}
- (void)scrollViewDidScroll:(UIScrollView *)sender
{
// Update our page when we have more than 50% of the adjacent page available
CGFloat pageWidth = scrollView.frame.size.width;
int page = floor((scrollView.contentOffset.x - pageWidth/2)/pageWidth) + 1;
if(page < 0 || page >= pageControl.numberOfPages)
{
return;
}
pageControl.currentPage = page;
[pageControl setNeedsDisplay];
}