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POSetting a predicate for different tableviews
 

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  1. POSetting a predicate for different tableviews
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    <p>This one has been a big problem for me, and i´m still stuck with it so i was hopping that someone could give me some kind of guidance. </p> <p><strong>What i have is:</strong></p> <ul> <li>3 tableviews with multiple cells and each cell with several textfields.</li> <li>1 tableview that appears inside a popover every time a specific textfield on those cells is pressed. This tableview has all!! the core data methods to retrieve the necessary data from my database.</li> </ul> <p>Everything works ok...but i need to distinguish what kind of data shall appear in tableview 1 or 2 or 3...So i know i have to use predicate!.</p> <p><strong>What i have done:</strong> ( and i have tried other things)</p> <pre class="lang-m prettyprint-override"><code>- (NSFetchedResultsController *)fetchedResultsController { if (_fetchedResultsController == nil) { NSFetchRequest *fetchRequestList = [[NSFetchRequest alloc] init]; NSEntityDescription *entityList = [NSEntityDescription entityForName:@"List" inManagedObjectContext:self.managedObjectContext]; [fetchRequestLista setEntity:entityList]; TableViewOne *table1 = [[Cobertura alloc]init]; TableViewTwo *table2 = [[Cobertura alloc]init]; if (table1 textFieldShouldBeginEditing:table1.textFieldPressed) { fetchRequestList.predicate = [NSPredicate predicateWithFormat:@"%K IN %@", @"reference", arrayTableview1]; } if (table2 textFieldShouldBeginEditing:table2.textFieldPressed) { fetchRequestList.predicate = [NSPredicate predicateWithFormat:@"%K IN %@", @"reference", arrayTableview2]; } NSSortDescriptor *cellTitle = [[NSSortDescriptor alloc] initWithKey:@"reference" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:cellTitle, nil]; [fetchRequestLista setSortDescriptors:sortDescriptors]; _fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequestLista managedObjectContext:self.managedObjectContext sectionNameKeyPath:@"referencia" cacheName:nil]; _fetchedResultsController.delegate = self; self.fetchedResultsController = _fetchedResultsController; return _fetchedResultsController; } </code></pre> <p>In each of my tableviews, i have an instance of the "popoverTableview" in my method textFieldShouldBeginEditing:</p> <pre class="lang-m prettyprint-override"><code>popoverTableview = [self.storyboard instantiateViewControllerWithIdentifier:@"popoverTableview"]; popover = [[UIPopoverController alloc] initWithContentViewController:popoverTableview]; [popover presentPopoverFromRect:textField.bounds inView:textField permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES]; popoverTableview.delegate = self; popoverTableview.popView = self.popover; </code></pre> <p>So, if i´m in tableview1 i need to get [NSPredicate predicateWithFormat:@"%K IN %@", @"reference", arrayTableview1];</p> <p>Should i be creating some kind of method that my tableviewS could access? What am i forgetting here or not paying attention?</p> <p>Thanks in advance, and any kind of advise would be welcome! Regards </p> <p><strong>For everyone that was experiencing the same problem that i was, here is what i have done to resolve:</strong></p> <p>This is when i´m creating the popoverview when a specific textfield is pressed:</p> <pre class="lang-m prettyprint-override"><code>popoverTableview = [self.storyboard instantiateViewControllerWithIdentifier:@"popoverTableview"]initWithTextFieldTag:myTextFieldThatWasPressed.tag] popover = [[UIPopoverController alloc] initWithContentViewController:popoverTableview]; [popover presentPopoverFromRect:textField.bounds inView:textField permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES]; popoverTableview.delegate = self; popoverTableview.popView = self.popover; popoverTableview.aIntVariable = myTextFieldThatWasPressed; </code></pre> <p>then in my popovertableview:</p> <pre class="lang-m prettyprint-override"><code>- (id)initWithTextFieldTag:(int)textFieldTag { self.aIntVariable = textFieldTag; return self; } </code></pre> <p>Then in the fetchedResultsController method, you´ll just have to create simple if´s telling wich predicate you want...</p> <p>Regards</p>
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    1. This table or related slice is empty.
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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