Tableview in scrollview not showing - ios

Question

I was trying to implement a view like twitter's iOS app. The view controller contains a scroll view can scroll horizontally, in each page of the scrollview, there is a tableview. For simplicity I just created two UITableView, and add them inside two UIView containers, because besides tableView, I also have some view to show, so the tableView and all other views are added as subViews of the viewContainer for each page.
The view hierarchy is like this:
UIViewController
--view
--scrollView
--view1
--tableView1
--someOtherViews
--view2
--tableView2
--someOtherViews
In the viewDidLoad methods, I implemented something like this:
-(void)viewDidLoad
{
//Some other setup...
scrollView = [[UIScrollView alloc]initWithFrame(0,y0,self.view.frame.size.width,self.view.frame.size.height-offset)];
scrollView.pageEnabled = YES;
scrollView.contentSize = CGSizeMake(self.view.frame.size.width * 2, self.view.frame.size.height - offset);
[self.view addSubView:scrollView];
view1 = [[UIView alloc]initWithFrame:CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height-offset)];
tableView1 = [[UITableView alloc]initWithFrame:CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height-offset) style:UITableViewStyleGrouped];
tableView1.delegate = self;
tableView1.dataSource = self;
//other setup...
[view1 addSubView:tableView1];
[scrollView addSubView:view1];
view2 = [[UIView alloc]initWithFrame:CGRectMake(self.view.frame.size.width,0,self.view.frame.size.width,self.view.frame.size.height-offset)];
tableView2 = [[UITableView alloc]initWithFrame:CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height-offset) style:UITableViewStyleGrouped];
tableView2.delegate = self;
tableView2.dataSource = self;
//other setup...
[view2 addSubView:tableView2];
[scrollView addSubView:view2];
}
For test purpose, I populate the same datasource for both tables. The problem is if I only add one tableView container (for instance view1, which includes tableView1) as the subView of the scrollView, the view shows perfect, one can page to second page, which is blank, and the view controller can be load and show. The same for the second one.
However, if I use the code above, which adds both view containers as the subView of the scrollView, the app would crash when load this view controller. However, if I add the second view container (view2 or view1), but in the view container, I am not adding tableView as its subView, but has other subViews, it works perfectly.
So I figured the problem probably comes from two tableViews. However, I have tried to debug this for a few hours, and still no luck. Anyone can help me?
Thanks!!

Answer 1

I think it is something with you UITableViewDelegate or DataSource methods.
Probably it is the reason you crash.
-Suggestion:
try to make your UITableViews as an iVar and in dataSource methods
specify the tableView you want
like:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section
{
if(tableView == _tableView1)
return _table1DataSource.count;
else
return _table2DataSource.count;
}
try to do it for other methods.