Pass attribute via prepareForSegue - ios

Question

How do I pass an attribute (this attribute is from an entity) via prepareForSegue for a custom cell?
Consequently, I also have doubts about sending this attribute as filter through in accordance with the line that the user clicks? For example, in the first table the user clicks in the "Pizzeria", then the second screen is shown another table containing only establishments with the category "Pizzeria".
Here is my code so far
#pragma mark - Ações da tabela
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
//O número de linhas da tabela será o mesmo número de objetos na lista de categorias
return listaDeCategorias.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
CelulaEstabelecimentoTableViewCell *celula = [tableView dequeueReusableCellWithIdentifier:IdentificadorCelula
forIndexPath:indexPath];
if(!celula) {
celula = [[CelulaEstabelecimentoTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:IdentificadorCelula];
}
categoria = [NSEntityDescription insertNewObjectForEntityForName:#"Categoria" inManagedObjectContext:contexto];
categoria.nome = [listaDeCategorias objectAtIndex:indexPath.row];
[celula.textLabel setText:categoria.nome];
[celula setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
return celula;
}
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
categoria.nome = [listaDeCategorias objectAtIndex:indexPath.row];
//NSString *categoriaClicada = [listaDeCategorias objectAtIndex:indexPath.row];
[self performSegueWithIdentifier:IdentificadorSegue sender:categoria.nome];
}
#pragma mark - Segue
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if([segue.identifier isEqualToString:IdentificadorSegue]) {
UINavigationController *navigationController = [segue destinationViewController];
EstabelecimentoViewController *destino = (EstabelecimentoViewController *)([navigationController viewControllers][0]);
}
}
Note: The prepareForSegue method is purposely incomplete because they do not know how to proceed from there.
And here the custom cell I wish fill with filtered data
Mapped by:
Storyboard:

Answer 1

Assuming the ViewController you are segueing too is EstabelecimentoViewController which has a public property "nome", this is how you would pass "nome" to EstabelecimentoViewController.nome:
#import 'EstabelecimentoViewController.h'
.
.
.
#pragma mark - Segue
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if([segue.identifier isEqualToString:IdentificadorSegue]) {
EstabelecimentoViewController *establishmentVC = [segue destinationViewController];
establishmentVC.nome = categoria.nome;
}
}

Answer 2

/* Try This...*/
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:#"mySegue"] && self.demoObject != nil) {
// This line returns a value...
NSLog(#"self.demoObject = %#", self.demoObject.itemDescription);
// ...but it crashes here when it tries to set on the destinationViewController
if ([[segue destinationViewController] isKindOfClass:[SecondViewController class]]) {
SecondViewController *destinationViewController = (SecondViewController *)[segue destinationViewController];
destinationViewController.selectedItemPhoto = self.demoObject.photo;
destinationViewController.selectedItemTitle = self.demoObject.itemDescription;
}
}
}