Segue is executed twice - ios

Question

I am trying to transition between view controllers with a segue. It is navigating correctly but it is running twice.
Here is my code:
- (IBAction)onActionNext:(id)sender {
if ([[nameField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]isEqualToString:#""]) {
}else if([[emailField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] isEqualToString:#""]){
}else if([[mobileField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] isEqualToString:#""]){
}else{
[self performSegueWithIdentifier:#"VerifyNext" sender:sender];
}
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([[segue identifier] isEqualToString:#"VerifyNext"]) {
// Get destination view
OTPSceneViewController *vc = [segue destinationViewController];
[vc setTitle:#"myapp"];
}
}

Answer 1

If even after commenting this line segue still run then as #mikealter said segue is connected your button. Check if when you check for when you click segue what it highlights.
A button like:
Or A View Controller like:
If you fall in first case that means your segue is connected to a button and, that is the reason why it opens next page even if you comment your code. And 2 times when you keep code(one from storyboard and another from code).
Edit:
If you want to call next page from code only. Remove Segue. Then reconnect it with view controller like:

Answer 2

First, whenever you create a segue (i.example) FROM a Button TO a View Controller, you are creating the link between VC1 and VC2.
If you run your project you will see that the segue works navigating from one VC to the other one.
This means that it already performs the segue, so if you declare an ACTION for your button and make a call to - perform segue... - it will run twice.
Note: if you call performSegueWithIdentifier is probably because you want to pass some data via SENDER. In that case you (obviously) need to call the segue ONCE, so instead of creating the segue from the button to the next VC, (first delete that segue), create a new one FROM the VCOrigin to VCDestination -> there are many ways to do it, but from the Interface Builder is as simple as right click on the top yellow rounded icon and drag&drop on the destinationVC. Don't forget to set the identifier on the Attributes Inspector.
Now, in your button~Action make the call to performSegueWithIdentifier and pass the data.

Answer 3

if you stop storyboard segue use following method:
override func shouldPerformSegueWithIdentifier(identifier: String,sender: AnyObject?) -> Bool {
return false
}

Answer 4

You don't even add
[self performSegueWithIdentifier:#"VerifyNext" sender:sender];
in onActionNext method if you add the segue in storyboard
If you want to navigate to next view controller use above line.
Preparing for the Segue
In order to pass information from one view controller to another using
the UIStoryboardSegue object we’ll need to take advantage of the
current view controller’s prepareForSegue:sender: method.
But If you call both,it calls two times.So make sure that whether you want to pass information or data to next view controller or just navigate the view.
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
NSLog(#"prepareForSegue: %#", segue.identifier);
if([segue.identifier isEqualToString:#"VerifyNext"])
{
VerifyNextViewController *verifyNVC = segue.destinationViewController;
verifyNVC.name = #"Prashabt";
verifyNVC.id = #"1234";
}
else if([segue.identifier isEqualToString:#"VerSeg"])
{
AnotherViewController *anotherVC = segue.destinationViewController;
anotherVC.name = #"Sharma";
anotherVC.id = #"3245";
}
}

Answer 5

have a look of this question this may sure rectify
or there is another way to navigate to another view controller using below code.
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:#"viewControllerName"];
[self.navigationController pushViewController:vc animated:YES];
make sure you give identity to the view controller using identity inspector see image.