Multiple dataSource and one tableView. SearchController about datasource HOT 10 CLOSED

Hi Amanbolat,

Interesting problem. I believe the error is happening because new animations are starting while other ones are in progress. Combining multiple data sources in one table view has given me a lot of headaches in the past, I think we could figure out some workarounds if we manage to reproduce the error in a sample project, but have you considered using 3 table views each one with a different data source and just switch between them when the segmented control changes his value? Might make things much faster.

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I will try your method with multiple table views and also will create sample project to reproduce the error.

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@3lvis I found problem. Because i have only one tableView and multiple dataSources, each time i change dataSource for my tableView, previous dataSource doesn't stop call functions of it's NSFetchedResultsControllerDelegate functions:
controllerWillChangeContent
controllerDidChangeContent
If i'm right all these methods still use tableView and cause problem.
So i added new var isUpdatingTableView = true and this method, that i call when user changes segment of segmentedControl:

func segmentValueChanged(segmentedControl: UISegmentedControl) {
    if segmentedControl.selectedSegmentIndex == 0 {
      dataSourceONE.isUpdatingTableView = true
      dataSourceTWO.isUpdatingTableView = false
      dataSourceTHREE.isUpdatingTableView = false
      self.tableView.dataSource = dataSourceONE
      self.activeFRCSource = dataSourceONE

    } else if segmentedControl.selectedSegmentIndex == 1 {
      dataSourceTWO.isUpdatingTableView = true
      dataSourceONE.isUpdatingTableView = false
      dataSourceTHREE.isUpdatingTableView = false
      self.tableView.dataSource = dataSourceTWO
      self.activeFRCSource = dataSourceTWO

    } else if segmentedControl.selectedSegmentIndex == 2 {
      dataSourceTHREE.isUpdatingTableView = true
      dataSourceTWO.isUpdatingTableView = false
      dataSourceONE.isUpdatingTableView = false
      self.tableView.dataSource = dataSourceTHREE
      self.activeFRCSource = dataSourceTHREE
    }
    self.tableView.reloadData()
}

I think u can add feature it to your DATASource if somebody faced same problem.

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Hi @amanbolat,

Before I had something like what you're showing here, but it ended up introducing more problems than solutions. I'm happy that you got to fix your issue, I still think having multiple-controllers and datasources, or even just updating the predicate when switching datasources could be a better solution.

https://github.com/3lvis/DATASource/blob/master/Source/DATASource.swift#L84-L102

Let me know if I can help with anything else.

Best,

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Something like this could help too

http://stackoverflow.com/a/28878191/717416

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Thanks, it's good idea. I'll try it too.

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@amanbolat Is there a chance you could share a sample project reproducing this issue? Would be nice to get it fixed in case is affecting other users too.

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@3lvis https://github.com/amanbolat/DATASourceMultipleSourceSample
On viewDidLoad it will fetch data and save to core data, then u can delete and fetch again, until u delete go to another segment fetch again and go back to first segment.

But i don't use your DATAStack, because i'm not so good at Core Data and have my own stack.

EDIT: I added Delete button to reproduce issue, because in my app i use our company ERP API where data is edited, deleted, added every minute and user need to be synced.

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@amanbolat thanks a lot! This is very useful.

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Doing some spring cleaning, please make a new issue if you still want to do this.

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