Displaying a sum total of cells in a dynamic tableview - core-data

Question

I have a problem that Im sure many objectiveC developers would be able to solve pretty easily. Im developing an app which is a dynamic tableview with different groups that the user can create. The user can enter a number of groups with different totals. I am trying to sum the total of all the groups created.
The IBAction I am using to calculate the subtotal is
- (IBAction)Calculate:(id)sender {
//---------------
NSInteger Tempsum = [[_dataArray valueForKeyPath:#"#sum.name2"] integerValue];
_TotalAnimals.text = [[NSString alloc] initWithFormat:#"%.1ld", (long)Tempsum];
//--------------
}
I have created the following code in the .m file of my tableview and also created a NSArray property called;
#property NSArray *dataArray;
however I am unsure as to the correct code to use to be able to link the result ( #"#sum.name2" ) to the text value in the Tableviewcontroller ( _TotalAnimals.text)
Any help with this problem would be much appreciated. below is the full code for the .m file
#import "TSPViewController.h"
#import <CoreData/CoreData.h>
#import "TSPToDoCell.h"
#import "TSPAddToDoViewController.h"
#import "TSPUpdateToDoViewController.h"
int TempTotalAnimals = 0;
int TotalAnimals = 0;
int Tempsum = 0;
#interface TSPViewController () <NSFetchedResultsControllerDelegate>
#property (strong, nonatomic) NSFetchedResultsController *fetchedResultsController;
#property (strong, nonatomic) NSIndexPath *selection;
#property NSArray *dataArray;
#end
#implementation TSPViewController
#pragma mark -
#pragma mark View Life Cycle
- (void)viewDidLoad {
[super viewDidLoad];
// Initialize Fetch Request
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:#"TSPItem"];
// Add Sort Descriptors
[fetchRequest setSortDescriptors:#[[NSSortDescriptor sortDescriptorWithKey:#"createdAt" ascending:YES]]];
// Initialize Fetched Results Controller
self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:nil];
// Configure Fetched Results Controller
[self.fetchedResultsController setDelegate:self];
// Perform Fetch
NSError *error = nil;
[self.fetchedResultsController performFetch:&error];
if (error) {
NSLog(#"Unable to perform fetch.");
NSLog(#"%#, %#", error, error.localizedDescription);
}
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"addToDoViewController"]) {
// Obtain Reference to View Controller
UINavigationController *nc = (UINavigationController *)[segue destinationViewController];
TSPAddToDoViewController *vc = (TSPAddToDoViewController *)[nc topViewController];
// Configure View Controller
[vc setManagedObjectContext:self.managedObjectContext];
} else if ([segue.identifier isEqualToString:#"updateToDoViewController"]) {
// Obtain Reference to View Controller
TSPUpdateToDoViewController *vc = (TSPUpdateToDoViewController *)[segue destinationViewController];
// Configure View Controller
[vc setManagedObjectContext:self.managedObjectContext];
if (self.selection) {
// Fetch Record
NSManagedObject *record = [self.fetchedResultsController objectAtIndexPath:self.selection];
if (record) {
[vc setRecord:record];
}
// Reset Selection
[self setSelection:nil];
}
}
}
#pragma mark -
#pragma mark Fetched Results Controller Delegate Methods
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller {
[self.tableView beginUpdates];
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller {
[self.tableView endUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath *)newIndexPath {
switch (type) {
case NSFetchedResultsChangeInsert: {
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
}
case NSFetchedResultsChangeDelete: {
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
}
case NSFetchedResultsChangeUpdate: {
[self configureCell:(TSPToDoCell *)[self.tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath];
break;
}
case NSFetchedResultsChangeMove: {
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
}
#pragma mark -
#pragma mark Table View Data Source Methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [[self.fetchedResultsController sections] count];
}
- (void)configureCell:(TSPToDoCell *)cell atIndexPath:(NSIndexPath *)indexPath {
// Fetch Record
NSManagedObject *record = [self.fetchedResultsController objectAtIndexPath:indexPath];
// Update Cell
[cell.nameLabel setText:[record valueForKey:#"name"]];
[cell.nameLabel2 setText:[record valueForKey:#"name2"]];
[cell.doneButton setSelected:[[record valueForKey:#"done"] boolValue]];
[cell setDidTapButtonBlock:^{
BOOL isDone = [[record valueForKey:#"done"] boolValue];
// Update Record
[record setValue:#(!isDone) forKey:#"done"];
}];
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
return NO;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
NSManagedObject *record = [self.fetchedResultsController objectAtIndexPath:indexPath];
if (record) {
[self.fetchedResultsController.managedObjectContext deleteObject:record];
}
}
}
#pragma mark -
#pragma mark Table View Delegate Methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:YES];
// Store Selection
[self setSelection:indexPath];
// Perform Segue
[self performSegueWithIdentifier:#"updateToDoViewController" sender:self];
}
// NSArray Below============
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSArray *sections = [self.fetchedResultsController sections];
id<NSFetchedResultsSectionInfo> sectionInfo = [sections objectAtIndex:section];
return [sectionInfo numberOfObjects];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
TSPToDoCell *cell = (TSPToDoCell *)[tableView dequeueReusableCellWithIdentifier:#"ToDoCell" forIndexPath:indexPath];
// Configure Table View Cell
[self configureCell:cell atIndexPath:indexPath];
return cell;
}
- (IBAction)Calculate:(id)sender {
//---------------
NSInteger Tempsum = [[_dataArray valueForKeyPath:#"#sum.name2"] integerValue];
_TotalAnimals.text = [[NSString alloc] initWithFormat:#"%.1ld", (long)Tempsum];
//--------------
}
/*
//---------------
NSInteger TempsumTotalAnimals = [[_charactersArray valueForKeyPath:#"#sum.passenger"] integerValue];
_TotalAnimals.text = [[NSString alloc] initWithFormat:#"%.1ld", (long)TempsumTotalAnimals];
//--------------
*/
#end