objective c - How to find indexPath for tapped accessory button in tableView

Question

I've simple UITableView with one section and few rows. When user clicks cell accessory button (which is connected with detailsSegue. I want to know what cell row was it. So than I can select right object from my array and assign it to the variable from the next view.

I have used delegate method tableview:accessoryButtonTappedForRowWithIndexPath: and assigned indexPath value to my private property myRow. Than in prepareForSegue:sender: method I used my self.myRow.row value to select right object from array.

My problem is that these two methods seems to execute in wrong order. From the NSLog I can see that prepareForSegue:sender: method is executed first and my delegate method is changing value of self.myRow after it.

So prepareForSegue:sender: method is always passing wrong object to the next view (the one that was tapped previously).

Sorry for my english guys. Thanks for help in advance.

-(void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath {
    self.myRow = indexPath;
    NSLog(@"tapped button at row: %i",self.myRow.row); 
}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if([segue.identifier isEqualToString:@"addSegue"]) {
        AddViewController *avc = segue.destinationViewController;
        avc.delegate = self;
    }
    else if ([segue.identifier isEqualToString:@"detailsSegue"]) {
        NSLog(@"Segue row: %i",self.myRow.row);
        Annotation *annotation = [self.viewsList objectAtIndex:self.myRow.row];
        NSLog(@"Segue annotation object: %@",annotation.title);
        DetailsViewController *dvc = segue.destinationViewController;
        dvc.wikiKey = annotation.title;
    }
}

Answer 1

As you have discovered, the system sends you the prepareForSegue:sender: message before it sends you the tableview:accessoryButtonTappedForRowWithIndexPath: message.

But, when it sends you the prepareForSegue:sender: message, the sender argument is the UITableViewCell containing the accessory view. You can use that to determine which row's accessory button was tapped:

else if ([segue.identifier isEqualToString:@"detailsSegue"]) {
    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
    Annotation *annotation = [self.viewsList objectAtIndex:indexPath.row];
    DetailsViewController *dvc = segue.destinationViewController;
    dvc.wikiKey = annotation.title;
}