iphone - NSFetchedResultsController: should I always check fetchedObjects==nil before calling -performFetch? -


I am using NSFetchedResultsController for my table view. I call theFrfrech within the view-deedload method of my controller I do

Occasionally my controller is flipped and reloads, resulting in other calls -viewDidLoad and -performFetch. I found out that this was causing an error: "NSFetchedResultsController error: section '(empty)' not found in the controller '. I found out that calling -formft was causing problems like this many times, and my -viewDidLoad Modified: Method to do the following: 

  if (fetchedResCtrlr.fetchedObjects == zero) {NSError * error; if (! [FetchedResCtrlr: & amp; error]). .}

Being new to core data, I'm thinking that to take this right action Should I be able to actually call - ParformFetch: Once more without error? Normally, should I do something -DownloadDownload:?

Thank you!

NSFetchedResultsController in -viewDidUnload: There is no need to do anything with it.In addition, checking for a zero against -phid object is not normally worth it. Other flow issues are calling: -performFetch: will damage the performance on itself without more than one other ill effects only.


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