How can I do vertical paging with UITableView?
- by vodkhang
Let me describe the situation I am trying to do:
I have a list of Items. When I go into ItemDetailView, which is a UITableView. I want to do paging here like: When I scroll down out of the table view, I want to display the next item. Like in Good Reader:
Currently, I am trying 2 approaches but both do not really work for me.
1st: I let my UITableView over my scroll view and I have a nice animation and works quite ok except sometimes, the UITableView will receive event instead of my scroll view. And because, a UITableView is already a UITableView, this approach seems not be a good idea. Here is some code:
- (void)applicationDidFinishLaunching:(UIApplication *)application {
// a page is the width of the scroll view
scrollView.pagingEnabled = YES;
scrollView.contentSize = CGSizeMake(scrollView.frame.size.width, scrollView.frame.size.height * kNumberOfPages);
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.showsVerticalScrollIndicator = YES;
scrollView.scrollsToTop = NO;
scrollView.delegate = self;
[self loadScrollViewWithPage:0];
}
- (void)loadScrollViewWithPage:(int)page {
if (page < 0) return;
if (page >= kNumberOfPages) return;
[self.currentViewController.view removeFromSuperview];
self.currentViewController = [[[MyNewTableView alloc]initWithPageNumber:page] autorelease];
if (nil == currentViewController.view.superview) {
CGRect frame = scrollView.frame;
[scrollView addSubview:currentViewController.view];
}
}
- (void)scrollViewDidScroll:(UIScrollView *)sender {
if (pageControlUsed) {
return;
}
CGFloat pageHeight = scrollView.frame.size.height;
int page = floor((scrollView.contentOffset.y - pageHeight / 2) / pageHeight) + 1;
[self loadScrollViewWithPage:page];
}
- (IBAction)changePage:(id)sender {
int page = pageControl.currentPage;
[self loadScrollViewWithPage:page];
// update the scroll view to the appropriate page
CGRect frame = scrollView.frame;
[scrollView scrollRectToVisible:frame animated:YES];
pageControlUsed = YES;
}
My second approach is: using pop and push of navigationController to pop the current ItemDetail and push a new one on top of it. But this approach will not give me a nice animation of scrolling down like the first approach.
So, the answer to how I can get it done with either approach will be appreciated
