ios 8 tableview reloads automatically when view ap

Question

I have a table view, onclick of 7th row, I push another view. Then when I come back using pop, tableview is reloaded automatically in ios8. It does not happen is ios 7.

Problem is cellForRow and HeightForRow for 0,1,2,3 cell is not called. Hence table scrolls the 7th row up, and not visible. 9,10,11 cells are visible.

I want table to stay as it was when I come back to that view.

I saved selectedIndex and scrolled table to particular index in viewWillAppear.

[self.table_exhibitorProfile scrollToRowAtIndexPath:self.selectedIndexPath atScrollPosition:UITableViewScrollPositionNone animated:NO];

It shows 7th cell, but its position is not same as it was. It goes to top.

Answer 1

It shouldn't be reloading unless you tell it to. It's not automatically reloading in iOS 8 for me.

The only possibilities that I can come up with are that

1. you're using CoreData, an NSFetchedResutsController, and the same managedObjectContext in both view controllers. If something changes in the managedObjectContext in the second view controller, when you pop back, the fetchedResultsController will reload the table, or

2. you're calling tableView.reloadData() in viewWillAppear() or viewDidAppear().

Answer 2

I had the same problem and this is how I fixed it:

According to the Apple docs:

UITableView overrides the layoutSubviews method of UIView 
so that it calls reloadData only when you create a new 
instance of UITableView or when you assign a new data source.

In my case I was setting the table view's dataSource to nil in viewWillDisappear: and setting it back to self in viewWillAppear: thus causing the data to be reloaded.

The 'automatic' reload went away when I moved the dataSource assignment to viewDidLoad

Hope this helps!