Prepareforsegue Called Before Didselectrowatindexpath Only When Third Segue Is Added

prepareForSegue called before didSelectRowAtIndexPath only when third segue is added

The reason is you can't drag from a tableview cell to multiple views. As @rdelmar mentioned this is wrong. You should drag from the destination to the source view and then handle manually the way I did above.

Also can be found here: Conditional segue performed on tap on UITableViewCell

Swift didSelectRowAtIndexPath and prepareForSegue

You can fetch the selected indexPaths from tableView in your prepare for segue

    func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if(segue.identifier == "editSegue")
        {
            if let indexPath = tableView.indexPathForSelectedRow{
                let viewController : WorkoutView = segue.destinationViewController as! WorkoutView
                viewController.workoutInfoData = marrStudentData.objectAtIndex(indexPath.row) as! WorkoutInfo
                navigationItem.title = ""
            }
        }
    }

prepareForSegue called twice

You forgot the break in the second and third case of your switch maybe it will help ;)

Change your switch with :

switch (indexPath.row)
{
    case CategoryFilter:
    {
        [self performSegueWithIdentifier:@"FilteredCategoryView" sender:self];
         break;
    }
    case PriceFilter:
    {
        [self performSegueWithIdentifier:@"FilterByPriceSegue" sender:self];
         break;
    }
    case ConditionFilter:
    {
        [self performSegueWithIdentifier:@"SearchFilterConditionSegue" sender:self];
         break;
    }
}

If you don't put the break instruction in each of your cases the switch will do all the other case until the end of the switch or another break instruction.

Use didSelectRowAtIndexPath or prepareForSegue method for UITableView?

If you use prepareForSegue:sender:then you won't have as much to change if you later decide to trigger the segue from some control outside the table view.

The prepareForSegue:sender: message is sent to the current view controller, so I'd suggest something like this:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Assume self.view is the table view
    NSIndexPath *path = [self.tableView indexPathForSelectedRow];
    DetailObject *detail = [self detailForIndexPath:path];
    [segue.destinationViewController setDetail:detail];
}

In Swift:

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    let path = self.tableView.indexPathForSelectedRow()!
    segue.destinationViewController.detail = self.detailForIndexPath(path)
}

prepareForSegue getting called twice, with Attempt to present UINavigationController while presentation is in progress

The problem is prepareForSegue is called before didSelectRowAtIndexPath. You should just eliminate the didSelectRowAtIndexPath method, and do everything in prepareForSegue. You can use the following line to get the indexPath you need:

NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];

How to access segue in 'didSelectRowAtIndexPath'?

You should be using the didSelectRowAtIndexPath method to determine whether or not a cell was selected, and send the indexPath as the sender of the segue:

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    self.performSegueWithIdentifier("showQuestionnaire", sender: indexPath);
}

Then in your prepareForSegue method, get the indexPath from the sender parameter and use that to pass the correct row/data:

override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {
    if (segue.identifier == "showQuestionnaire") {
        let controller = (segue.destinationViewController as! UINavigationController).topViewController as! QuestionnaireController
        let row = (sender as! NSIndexPath).row; //we know that sender is an NSIndexPath here.
        let patientQuestionnaire = patientQuestionnaires[row] as! PatientQuestionnaire 
        controller.selectedQuestionnaire = patientQuestionnaire
    }
}

To explain...

1. I used the index path as the sender so I can easily pass the index path. You could also check for the currently selected cell using other UITableView methods, but I've always done it this way with success
2. You can't put performSegueWithIdentifier within the prepare for segue method, because performSegueWithIdentifier leads to prepareForSegue; You are just looping around and around with no aim. (When you want to perform a segue, prepareForSegue is always executed)
3. prepareForSegue doesn't run by itself when a row is selected. This is where you need didSelectRowAtIndexPath. You need a performSegueWithIdentifier outside of the method as described previously, which should be in didSelectRowAtIndexPath

UITableView didSelectRowAtIndexPath with prepareForSegue but didLoadView is not called

You have to embed the view controllers in a navigation controller for push segues to work. I don't know why it lets you define them without this in place.

To do this, click on your table view controller, then choose Editor --> Embed In --> Navigation Controller. If you should also be within a tab bar controller, then the navigation controller is embedded in that in a similar fashion. You should see the following:

Your segue will now work.

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