Ok I am trying to grab a NSMutable Set. Yes I have a previous post on this but this is slightly different. I have A player entity and a team entity. It is set up as a one to many relationship... On a different view controller I added players to the team. Now I am trying to get that teams players to show up on a table view... I am fetching the information as follows.
- (NSFetchedResultsController *)fetchedResultsController {
if (_fetchedResultsController != nil) {
return _fetchedResultsController;
}
NSString *entityName = #"Team";
NSLog(#"Setting up a Fetched Results Controller for the Entity named %#", entityName);
// 2 - Request that Entity
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:entityName];
AppDelegate *delegate = [[UIApplication sharedApplication] delegate];
_managedObjectContext = delegate.managedObjectContext;
// 4 - Sort it
request.sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:#"players"
ascending:NO
selector:#selector(localizedCaseInsensitiveCompare:)]];
// 5 - Fetch it
self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request
managedObjectContext:self.managedObjectContext
sectionNameKeyPath:nil
cacheName:nil];
_fetchedResultsController.delegate = self;
return _fetchedResultsController;
}
Then on my cell for row at index path I am setting the Player object to the fetched results as follows
Player *p = [_fetchedResultsController objectAtIndexPath:indexPath];
Then, I am setting the title of the cell like so.
cell.textLabel = p.firstName;
I am getting the error
reason: 'to-many key not allowed her
I am wondering what am I doing wrong???
Figured it out! I was sorting on a one to many relationship which is a NO NO in Core Data. I switched to sort on the player object and added a predicate to find the proper players I needed.
Related
I'm fairly new to Core Data and am still trying to understand accessing and filtering related data. My problem is either I'm not getting the data correctly into the managedObjectContext or I'm not pulling it out correctly. (I think the first, but I'm not sure.)
Here's my data model with two entities related one to many: (I plan to refactor once I get one level of relationship working.)
I have a SeasonsVC in which you click on a season name and the list of games for that season is supposed to appear in the GamesVC and you have the option to add or edit an existing game. This works fine at a first pass. I can add and edit games via this code in the GameDetailsVC:
-(IBAction)done:(UIBarButtonItem *)sender {
Game *game = nil;
if (self.gameToEdit != nil) {
game = self.gameToEdit;
NSLog(#"Hitting gametoedit");
} else {
game = [NSEntityDescription insertNewObjectForEntityForName:#"Game" inManagedObjectContext:self.managedObjectContext];
NSLog(#"Hitting new game");
}
game.opponent = self.opponentTextField.text;
//season.seasonDescription = self.seasonDescriptionTextView.text;
NSLog(#"Game to edit: %#", game.opponent);
//NSLog(#"Season: %#", season);
//NSLog(#"MOC in done: %#", self.managedObjectContext);
//NSLog(#"Season name: %#", season.seasonName);
[self dismissViewControllerAnimated:YES completion:nil];
}
I can then see the games in the GamesVC via the fetchedResultsController and delegate methods, but each game is associated with every season. Once I try to filter the data with a predicate so that I only see the games that were added for that season all the games disappear. Here's the code for that from the GamesVC:
- (NSFetchedResultsController *)fetchedResultsController {
if (_fetchedResultsController != nil) {
return _fetchedResultsController;
}
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription
entityForName:#"Game" inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
NSLog(#"Season name for predicate %#", self.season.seasonName);//shows correct season name
NSPredicate *predicate = [NSPredicate predicateWithFormat:[NSString stringWithFormat:#"season.seasonName like '%#'", self.season.seasonName]];
[fetchRequest setPredicate: predicate];
NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:#"dateOfGame" ascending:NO] ;
[fetchRequest setSortDescriptors:#[sortDescriptor]];
[fetchRequest setFetchBatchSize:20];
NSFetchedResultsController *theFetchedResultsController =
[[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest
managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil
cacheName:#"Root2"];
self.fetchedResultsController = theFetchedResultsController;
self.fetchedResultsController.delegate = self;
return _fetchedResultsController;
}
Since I can log the correct season name right before the predicate statement, I think that the added games are not getting "associated" with the correct season when I put them in the MOC in the done: method shown above; otherwise, I'd expect the predicate to find them.
Can you help this rookie? Thanks.
A day later I have this sorted. I needed to make three changes to what I was doing.
First, in my prepareForSegue in my GameListVC I needed to pass the season along to the GameDetailsVC by changing the code to this. (Just added the one line: controller.season = self.season)
//pass the Season object to be edited
NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
Game *gameToEdit = [self.fetchedResultsController objectAtIndexPath:indexPath];
controller.gameToEdit = gameToEdit;
controller.season = self.season;
Second, I had to put the new/edited game object into the MOC by adding these two lines to my done: method in the GameDetailsVC.
NSMutableSet *games = [self.season mutableSetValueForKey:#"games"];
[games addObject:game];
Third, I needed to simplify my predicate statement in my fetchedResultsController method in the GameListVC.
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"season.seasonName like %#", self.season.seasonName];
So, to answer my own question, I was both not saving the game linked to the season and my predicate was wrong.
I hope some of this helps another rookie.
I am actually new to iPhone programming and have successfully create an app but I can't figure out how to retrieve the values stored in NSSet. I have 2 entities in core data related to each other. Users one-to-many to Scores. Users entity has firsNname and lastName attributes and Scores entity has onTime, wasAbsent, and dateIn attributes. I fetch using predicate based on firstName and lastName and then execute the fetch. The fetch is successful and I am able to get both entities in one fetch call. However I cannot get values for the values from Scores entity. Whatever I do, it always returns NSSet object. What I want to do is to retrieve the boolean value which was stored in onTime and wasAbsent attributes and feed them to UISwitch.
AppDelegate *delegate = [[UIApplication sharedApplication] delegate];
self.managedObject = delegate.managedObjectContext;
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:#"Student"];
fetchRequest.predicate = [NSPredicate predicateWithFormat:#"firstname == %# AND lastname == %#", #"James", #"Smith"];
NSError *error = nil;
self.scoresArray = [self.managedObject executeFetchRequest:fetchRequest error:&error];
if ([self.scoresArray count]) {
Student *student = [self.scoresArray objectAtIndex:0];
NSSet *score = student.scores;
NSArray *arr = [score allObjects];
NSLog(#"%#", [arr objectAtIndex:0]);
}
if I can directly access the Score entity instead of using NSSet, that would be ideal that way I can reference it using a dot notation.
Any help would be appreciated. Thanks
Use something like the following:
AppDelegate *delegate = [[UIApplication sharedApplication] delegate];
self.managedObjectContext = delegate.managedObjectContext;
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:#"Student"];
fetchRequest.predicate = [NSPredicate predicateWithFormat:#"firstname == %# AND lastname == %#", #"James", #"Smith"];
NSError *error = nil;
NSArray *studentArray = [self.managedObjectContext executeFetchRequest:fetchRequest error:&error];
for (Student *student in studentArray) {
Student *student = [self.studentArray objectAtIndex:0];
NSLog(#" student is %# %#", student.firstname, student.lastname);
for (Score *score in student.scores) {
// Do something with score
NSLog(#" score is %#", score);
}
}
Because Student has to-many relationship to Scores (and the property for it is scores), when you get the value of student.scores, it returns an unordered collection, which is NSSet in Foundation. So you just work with it like you work with NSSet and with collections in general.
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.
What i have is:
3 tableviews with multiple cells and each cell with several textfields.
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.
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!.
What i have done: ( and i have tried other things)
- (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;
}
In each of my tableviews, i have an instance of the "popoverTableview" in my method textFieldShouldBeginEditing:
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;
So, if i´m in tableview1 i need to get [NSPredicate predicateWithFormat:#"%K IN %#", #"reference", arrayTableview1];
Should i be creating some kind of method that my tableviewS could access? What am i forgetting here or not paying attention?
Thanks in advance, and any kind of advise would be welcome!
Regards
For everyone that was experiencing the same problem that i was, here is what i have done to resolve:
This is when i´m creating the popoverview when a specific textfield is pressed:
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;
then in my popovertableview:
- (id)initWithTextFieldTag:(int)textFieldTag
{
self.aIntVariable = textFieldTag;
return self;
}
Then in the fetchedResultsController method, you´ll just have to create simple if´s telling wich predicate you want...
Regards
If the fetched results controller is for the popover table and you need to know in which table the text field was selected, I'd recommend tagging each of the text fields when you create them and creating an int _currentTable instance variable. That way, when your textFieldShouldBeginEditing: method is called, you can set the ivar's value with the tag and check that tag when creating the fetched results controller for the popover table.
So, instead of
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];
}
you'll have
if (_currentTable == 1) {
fetchRequestList.predicate = // table one predicate
} else if (_currentTable == 2) {
fetchRequestList.predicate = // table two predicate
}
UPDATE:
This is how I would override the init from code. In your popover table view controller implementation:
- (id)initWithTableTag:(int)tableTag
{
self = [super init];
if (self) {
_currentTable = tableTag;
}
return self;
}
(Make sure you also declare - (id)initWithTableTag:(int)tableTag; in your header.) Then, when you create and present the popover controller (which I'm assuming you're doing in the textFieldShouldBeginEditing: delegate call):
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
// ...
YourPopoverTableViewControllerClass *vc = [[YourPopoverTableViewControllerClass alloc] initWithTableTag:textField.tag];
// ...
// display the popover
return YES;
}
Unfortunately, I don't know how to do this using storyboards.
I have been looking over this issue since a week and haven't got any solution, so I thought to make the question more generalized, may be it will help the users to look into it and give me a solution.
Scenario:
I have an expense tracking iOS Application and I have a view controller called "DashBoardViewController" (table view controller - with FRC) which would basically categorize my expenses/incomes for a given week, a month, or year and display it as the section header title for example : (Oct 1- Oct 7, 2012) and it shows expenses/incomes ROWS and related stuff according to that particular week or month or year.
My Question:
What I want to accomplish is :
Show Distinct Results based on "Category" attribute of "Money" entity and calculate "Sum" based on the attribute.
But, my view controller called "dashboard view controller" is filled with NSFetchedResultsController with section name key path as "type" that can be an expense or an income. In order to get Distinct results, I shall use Result type as NSDictionaryResultsType in my fetch request which will give me unique results but FRC fails, it doesn't work with that. So, how will I get my section names then? I have posted the code below.
EDIT - BASED ON MARTIN'S SUGGESTION
- (void)userDidSelectStartDate:(NSDate *)startDate andEndDate:(NSDate *)endDate
{
AppDelegate * applicationDelegate = (AppDelegate *) [[UIApplication sharedApplication] delegate];
NSManagedObjectContext * context = [applicationDelegate managedObjectContext];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Money" inManagedObjectContext:context];
[fetchRequest setEntity:entity];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
NSPredicate *predicateDate = [NSPredicate predicateWithFormat:#"(date >= %#) AND (date <= %#)", startDate, endDate];
[fetchRequest setPredicate:predicateDate];
// Edit the sort key as appropriate.
typeSortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"type" ascending:YES];
dateSortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"date" ascending:YES];
if(self.choiceSegmentedControl.selectedIndex == 0)
{
choiceSortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"cat" ascending:NO];
}
if(self.choiceSegmentedControl.selectedIndex == 1)
{
choiceSortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"vendor" ascending:NO];
}
if(self.choiceSegmentedControl.selectedIndex == 2)
{
choiceSortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"paidBy" ascending:NO];
}
NSArray * descriptors = [NSArray arrayWithObjects:typeSortDescriptor, dateSortDescriptor,choiceSortDescriptor, nil];
[fetchRequest setSortDescriptors:descriptors];
[fetchRequest setIncludesSubentities:YES];
NSError * anyError = nil;
NSArray *propertiesToFetch = [[NSArray alloc] initWithObjects:
[entity.propertiesByName objectForKey:#"cat"],
nil];
[fetchRequest setReturnsDistinctResults:YES];
[fetchRequest setResultType:NSDictionaryResultType];
[fetchRequest setPropertiesToFetch:propertiesToFetch];
NSArray * objects = [context executeFetchRequest:fetchRequest error:&anyError];
for (NSDictionary *d in objects)
{
NSLog(#"NSDictionary = %#", d);
}
NSSet *uniqueSet = [NSSet setWithArray:[objects valueForKey:#"cat"]];
uniqueArray = [NSMutableArray arrayWithArray:[uniqueSet allObjects]];
self.categoryArray = uniqueArray;
if(_fetchedResultsController)
{
[_fetchedResultsController release]; _fetchedResultsController = nil;
}
_fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:context sectionNameKeyPath:#"type" cacheName:nil];
//self.fetchedResultsController.delegate = self; in order to stop "change tracking"
if(![_fetchedResultsController performFetch:&anyError])
{
NSLog(#"error fetching:%#", anyError);
}
[fetchRequest release];
//Finally you tell the tableView to reload it's data, it will then ask your NEW FRC for the new data
[self.dashBoardTblView reloadData];
self.startDate = startDate;
self.endDate = endDate;
}
With this code, SECTION NAME KEY PATH is not working and it's complaining that the object will be placed in unnamed section.
A fetched results controller does not support change tracking (i.e. the FRC delegate is set) in combination with a fetch request with NSDictionaryResultType.
The reason is documented with the setIncludesPendingChanges: function:
Special Considerations
A value of YES is not supported in conjunction
with the result type NSDictionaryResultType, including calculation of
aggregate results (such as max and min). For dictionaries, the array
returned from the fetch reflects the current state in the persistent
store, and does not take into account any pending changes, insertions,
or deletions in the context.
Change tracking of the FRC implies includesPendingChanges = YES for the fetch request, and that does not work with NSDictionaryResultType.
One workaround could be to use a FRC without change tracking, so you do not set the FRC delegate. But that means that to update your table view, you have to
save the managed object context, and
call performFetch on the FRC and reloadData on the table view.
Another workaround could be to use the FRC to fetch all sections and rows without the sum aggregation, and use the results to compute new table rows with the aggregation in memory (e.g. in controllerDidChangeContent).
UPDATE: (From the discussion) Another important point is that if you use a fetch request with NSDictionaryResultType, then the sectionNameKeyPath of the fetched results controller must be included in the propertiesToFetch of the fetch request.
This is a follow up question to my previous question on:
Core data: Managing employee contracts in a many-to-many relationship?
There is a diagram on that question, and as a quick reminder there is the following:
company --< contracts >-- employees
I have been able to manually save 1 entity inside each of the entities, and verified them all in NSLog.
I've created a CompanyListPage which lists all companies. The idea is that when you click on a company you will be presented with a list of all employees who have a contract with said company.
As context see below:
Company:
name: A
Contract:
length: 33 wks
salary: 20000
Employee:
name: Bob Jones
In my didSelectRowAtIndex page within my CompanyListPage I have the following.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
Company *c = [fetchedResultsController objectAtIndexPath:indexPath];
NSLog(#"You clicked %#", c.name);
NSString *companyName = c.name;
EmployeesListPage *employeesListPage = [[EmployeesListPage alloc] initWithNibName:#"EmployeesListPage" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:employeesListPage animated:YES];
employeesListPage.title = companyName;
employeesListPage.managedObjectContext = self.context;
employeesListPage.managedObject = c;
[superstarsList release];
}
The problem however is, I am not sure what my NSPredicate should look like when I eventually go to the employeesListPage.
At the moment, its this:
- (NSFetchedResultsController *)fetchedResultsController
{
if (fetchedResultsController != nil) {
return fetchedResultsController;
}
// Create and configure a fetch request
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Employees" inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
// Create the sort descriptors array
NSSortDescriptor *authorDescriptor = [[NSSortDescriptor alloc] initWithKey:#"name" ascending:YES];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:authorDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Create and initialize the fetch results controller
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:nil cacheName:#"Root"];
self.fetchedResultsController = aFetchedResultsController;
fetchedResultsController.delegate = self;
// Memory management.
[aFetchedResultsController release];
[fetchRequest release];
[authorDescriptor release];
[sortDescriptors release];
return fetchedResultsController;
}
Obviously this is wrong, because its not:
a) Looking in the contracts entity
b) Using the company entity in any way, shape or form
I know I need to use a NSPredicate, but I just know how to make it say "Find me all the employees with a contract length > 0 and working with company A" then order it by the name of the person descending, or even order it by the least contract length first.
Any pointers or help on this would be great. Thank you.
EDIT: First attempt (removed because I got it to work following an answer provided below)
EDIT: Unable to get contract information back?
I've been able to get all the employees that work for Company A back in my table view controller.
However I'm wanting to display in my cell information about the employee and their contract length/salary.
I've tried the following:
Employee *emp = [fetchedResultsController objectAtIndexPath:indexPath];
NSString *firstname = emp.firstname;
NSString *surname = emp.surname;
NSString *fullname = [firstname stringByAppendingString:#" "];
fullname = [fullname stringByAppendingString:surname];
// Logging tests
NSLog(#"Name: %#", fullname); // This is fine
NSLog(#"Contracts: %#", emp.empContracts); // This tells me of a problem with "Relationship fault for <NSRelationshipDescription: 0x602fdd0>"
I believe I need to get the NSPredicate to grab all the contract data, and not just the contract data; however I may be mistaken.
Again, help on this would be greatly appreciated.
I think if you use the ANY keyword, you'll restore the left side of the equation to a single quantity, which will agree with the right side of the equation:
NSPredicate *predicate = [NSPredicate predicateWithFormat:#“ANY contracts.employer == %#“, employer];
I think I have an answer now.
I did the following in my table view and got a valid relationship and all the output; however I am not sure if I am doing it right because it involves a for-loop.
I used the following StackOverflow related question/answer for my solution.
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
Employee *emp = [fetchedResultsController objectAtIndexPath:indexPath];
NSString *firstname = emp.firstname;
NSString *surname = emp.surname;
NSString *fullname = [firstname stringByAppendingString:#" "];
fullname = [fullname stringByAppendingString:surname];
NSLog(#"Employee: %#", fullname);
// Output the contract deals.
for (Contracts *deals in emp.contracts)
{
NSNumber *cLength = deals.length;
NSNumber *cSalary = deals.salary;
NSLog(#"Length: %#", cLength);
NSLog(#"Salary: %#", cSalary);
} // next
}
The next step for me is to include this in a custom view with custom labels to hold all this info.
If the for-loop is not the most efficient way to do this, I would welcome any suggestions/improvements, or even what is considered best practice.
Thank you.
Looks like it’s coming along well. I think all you need from there is to set the cell’s text: cell.textLabel = fullname.
But I’m not clear why you’re delving back into the contracts relationship — until I look at your sample text at the top. There, it looks like what you want is a list of contracts for the employer, and for each contract you want to show its to-one employee relationship and other attrs. In which case you don’t need a new fetch at all; you already have the employer and, through its to-many contracts relationship, you also have the contracts entities and, through them, the term, salary, employee, whatever.
Upon selection change in the employers table, you would do something like this:
NSUInteger row = [indexPath row];
Employer *employer = [self.arrayOfEmployersUsedToPopulateTable objectAtIndex:row];
self.selectedEmployer = employer;
self.arrayOfSelectedEmployersContracts = [employer.contracts allObjects]; // which probably faults them, but I think that’s OK here
// Then make a call to reload the other table, the one presenting the contracts info.
In the contracts table, you’d refer back to the selected employer, and present info for each contract:
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath {
NSUInteger row = [indexPath row];
Contract *contract = [self.arrayOfSelectedEmployersContracts objectAtIndex:row];
NSUInteger column = [indexPath column];
switch (column) {
(0) :
cell.textLabel = contract.length; // maybe you have to use an NSNumber method to convert to string, but probably not
break;
(1):
cell.textLabel = contract.employee.firstname;
break;
// and so forth
}}
P.S. For the UITableCell stuff, I consulted Beginning iPhone Development, by Mark and LaMarche, “Using the New Table View Cell.” You might like this book too.