Sections in Table Views Using an array of objects - ios

Question

I have code for a table view that does currently work. It segues perfectly. Does everything I want it to do. Except it does not have alphabetically sorted section titles though. I can't seem to get my code to work with any tutorial on the subject. I'm in need of some suggestions. What I'm looking to specifically do is add a section title for each item alphabetically with a starting letter of that to a section title. If there are no items with starting with say a "P" then I do not want that section title listed. My code is below:
#import "ChoicesTableViewController.h"
#import "MyDataChoices.h"
#import "AddChoiceViewController.h"
#interface ChoicesTableViewController () <UITableViewDelegate, UITableViewDataSource>
#property (weak, nonatomic) IBOutlet UITableView *myTableView;
#property (strong, nonatomic) NSMutableArray *arrayNames;
#property (strong, nonatomic) NSArray *sections;
#end
#implementation ChoicesTableViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.myTableView.delegate = self;
self.myTableView.dataSource = self;
//does not work with more than one array in the array
// self.arrayNames = [NSMutableArray arrayWithObjects:
// [NSMutableArray arrayWithArray:#[[MyDataChoices itemWithNewName:#"Apples"]]],
// [NSMutableArray arrayWithArray:#[[MyDataChoices itemWithNewName:#"Oranges"]]], nil];
self.sections = [[NSArray alloc] init];
self.sections = [NSArray arrayWithObjects:#"A",#"B", #"C", #"D", #"E", #"F", #"G", #"H", #"I", #"J", #"K", #"L", #"M", #"N", #"O", #"P", #"Q", #"R", #"S", #"T", #"U", #"V", #"W", #"X", #"Y", #"Z", nil];
self.arrayNames = [[NSMutableArray alloc] init];
[self.arrayNames addObjectsFromArray:#[
[MyDataChoices itemWithNewName:#"Apples"],
[MyDataChoices itemWithNewName:#"Bread"]]];
// self.arrayNames = [NSMutableArray arrayWithObjects:
// [MyDataChoices itemWithNewName:#"Apples"],
// [MyDataChoices itemWithNewName:#"Oranges"], nil];
}
//Segue if the item is tapped
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
MyDataChoices *currentRow = self.arrayNames[indexPath.row];
self.mySelectedCell = currentRow.myNameChoices;
[self performSegueWithIdentifier:#"unwindSegueAction" sender:self];
}
//unwind segue from add choice
- (IBAction)unwindSegueToChoices:(UIStoryboardSegue *)segue
{
AddChoiceViewController *sourceVC = segue.sourceViewController;
NSString *myNewItem = sourceVC.myTextField.text;
//NSString *myFinalString = [[myNewItem substringToIndex:1] capitalizedString];
NSString *stringCapitalized = [myNewItem capitalizedString];
[self.arrayNames addObjectsFromArray:#[[MyDataChoices itemWithNewName:stringCapitalized]]];
[self.tableView reloadData];
}
//titles for talble view
#pragma mark title indexing
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
return [self.sections objectAtIndex:section];
}
# pragma mark main table view
-(NSInteger) numberOfSectionsInTableView:(UITableView *) tableView
{
return 1;
}
-(NSInteger) tableView:(UITableView *) tableView numberOfRowsInSection:(NSInteger)section
{
return self.arrayNames.count;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
MyDataChoices *currentRow = self.arrayNames[indexPath.row];
UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:#"mainCell2" forIndexPath:indexPath];
cell.textLabel.text = currentRow.myNameChoices;
// NSArray *sectionArray = [self.arrayNames filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"SELF beginswith[c] %#", [self.sections objectAtIndex:self.sections]]];
return cell;
}
# pragma Mark delete slide button
//Delete Swipe Button
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
int index = indexPath.row;
[self.arrayNames removeObjectAtIndex:index];
[tableView deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationFade];
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
Here is myDataChoices Object code:
+ (MyDataChoices *)itemWithNewName:(NSString *)myNameChoices
{
MyDataChoices *object = [[MyDataChoices alloc] init];
object.myNameChoices = myNameChoices;
return object;
}