iOS override a Segue - ios

Question

I have a tableview controller and I would like to override the segue for the final row. Instead of going to the standard destination view controller I want to send it to another controller. How do I do this?
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
NSIndexPath *myIndexPath = [self.tableView
indexPathForSelectedRow];
long row = [myIndexPath row];
if ([[segue identifier] isEqualToString:#"ShowLocationsTableView"])
{
LocationsTableViewController *ViewController =
[segue destinationViewController];
ViewController.categoryDetailModel = #[_categoryTitle[row],
_categoryImages[row]];
}
}
This is the current prepareForSegue and I would like to change it. I would like to send it to another view controller using a segue "aboutCat". How do I do this?
I don't understand what happens between prepareForSegue [current] and viewDidLoad [destination]. Thanks
Sideeffects
Initial problem was solved by 'Nikita Took' yet there are some side effects
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
NSIndexPath *myIndexPath = [self.tableView indexPathForSelectedRow];
long row = [myIndexPath row];
if ([_categoryTitle[row] isEqualToString:#"About"])
{
NSLog(#"SKIPPING PREPARE");
}
else if ([[segue identifier] isEqualToString:#"ShowLocationsTableView"])
{
LocationsTableViewController *ViewController =
[segue destinationViewController];
ViewController.categoryDetailModel = #[_categoryTitle[row],
_categoryImages[row]];
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (tableView == self.tableView)
{
// I assume you have 1 section
NSLog(#"DIDSELECTROW");
NSLog(#"INDEX PATH %i", indexPath.row + 1);
NSLog(#"%i", [tableView numberOfRowsInSection:0]);
if (indexPath.row + 1 == [tableView numberOfRowsInSection:0])
{
NSLog(#"ABOUT");
[self performSegueWithIdentifier:#"aboutCat" sender:self];
}
else
{
NSLog(#"ELSE");
[self performSegueWithIdentifier:#"ShowLocationsTableView" sender:self];
}
}
}
Now the about works!!! But if I click on another row which is one of the mainSegue. It will call the subview controller 2x. I can verify this with NSLOG statements in the detailview viewdidload. The issue is that now the navigation controller takes two steps to return home.
[home] -> [detail view] -> [same detail view]
I can verify that the didselectrowatindexpath happens before the prepareforsegue
Any ideas why two segues are preformed?

Answer 1

Assume you have two segues: MainSegue (for all rows except the last one) and LastRowSegue (for the last row) you can do:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (tableView == self.tableView) {
// I assume you have 1 section
if (indexPath.row == [tableView numberOfRowsInSection:0]) {
[self performSegueWithIdentifier:#"LastRowSegue" sender:self];
} else {
[self performSegueWithIdentifier:#"MainSegue" sender:indexPath];
}
}
}
Try this for prepareForSegue. If it's not what you need, please explain what do you mean
It works but I'm getting double layered table views
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"MainSegue"]) {
NSIndexPath *selectedIndexPath = sender;
LocationsTableViewController *locationController = segue.destinationViewController;
locationController..=categoryDetailModel = #[_categoryTitle[selectedIndexPath.row], _categoryImages[selectedIndexPath.row]];
}
}

Answer 2

You can't do this in prepareForSegue -- the source and destination view controllers are already defined by the time prepareForSegue is called. You need to make two segues from your controller (not the cell) and call performSegueWithIdentifier:sender" in didSelectRowAtIndexPath. Choose which segue to perform based on the indexPath.

Answer 3

You can do something like this
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
int lastIndex=[tableArray count]-1;
if (indexPath.row == lastIndex) {
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
NSString* viewType = #"MenuVC";//u can have the identifier of the LocationViewCOntroller or where ever you wanna go from here
UIViewController* viewController = [storyboard instantiateViewControllerWithIdentifier:viewType];
self.navigationController.viewControllers = [NSArray arrayWithObjects:viewController, nil];
} else {
[self performSegueWithIdentifier:#"usualSegue" sender:self];
}
}