Pass property from Modal View Controller to Parent

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I have a tableview as a parent view controller with a child modal view controller. In the modal view controller, when users tap on a row, I'd like to set the parent's property 'filter.' However, it's just returning null.

How do I pass the NSString filter property back to its parent view? And should I be instantiating a parent view controller in the didSelectRowAtIndexPath method?

Below is the code for the modal view controller:

#import "FilterViewController.h"
#import "ContactsTableViewController.h"


@interface FilterViewController ()

@end

@implementation FilterViewController


- (void)viewDidLoad
{
    [super viewDidLoad];
    self.filterTable.dataSource = self;
    self.filterTable.delegate = self;
    [self performSelector:@selector(retrieveFilteredEvents)];
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.filterEvents count];
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *cellIdentifier = @"filterTableCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];


     NSDictionary *tempDict = [self.filterEvents objectAtIndex:indexPath.row];

    self.eventTitle = [tempDict objectForKey:@"eventType"];
    cell.textLabel.text = self.eventTitle;

    return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSDictionary *tempDict = [self.filterEvents objectAtIndex:indexPath.row];
    NSString *string = [tempDict objectForKey:@"eventType"];

    ContactsTableViewController *contactVC = [[ContactsTableViewController alloc] init];
    contactVC.filter = string;

    [self dismissViewControllerAnimated:YES completion:nil];
    [[NSNotificationCenter defaultCenter] postNotificationName:@"updateParent" object:nil];
}

#pragma mark - Helper Methods

- (IBAction)done:(id)sender
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

-(void)retrieveFilteredEvents
{
    PFQuery *retrieveEvents = [PFQuery queryWithClassName:@"eventTypes"];
    [retrieveEvents orderByAscending:@"eventOrder"];
    [retrieveEvents findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error) {
            self.filterEvents = [[NSArray alloc] initWithArray:objects];
        }
        [self.filterTable reloadData];
    }];

}

@end

asked 1 min ago

kerbelda

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