object cannot be nil - On a segue? - ios

Question

All I want to do in my code is move from one view to another. No matter how many different ways I try to go around it, any segue or any change from the current view causes this error:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'
There's no indication of what object it's talking about at all, and the app is crashing on my segue line. Oh and I'm using Xcode 5-DP and iOS 7. Here's my source:
LoginViewController.h
#import <UIKit/UIKit.h>
#import "ECSlidingViewController.h"
#import "MenuViewController.h"
#import <MessageUI/MessageUI.h>
#import <CoreData/CoreData.h>
#interface LoginViewController : UIViewController <UITextFieldDelegate>
#property (weak, nonatomic) IBOutlet UITextField *userTextField;
#property (weak, nonatomic) IBOutlet UITextField *passwordTextField;
- (IBAction)signupTouched:(UIButton *)sender;
- (IBAction)logInPressed:(id)sender;
- (IBAction)backgroundTouched:(id)sender;
- (IBAction)revealMenu:(id)sender;
#end
LoginViewController.m (Exception on line 8)
#import "LoginViewController.h"
#import "RegisterView.h"
#import <Parse/Parse.h>
#implementation LoginViewController
- (IBAction)signupTouched:(UIButton *)sender {
[self performSegueWithIdentifier:#"signup" sender:self];
// THE APPLICATION CRASHES ON THIS LINE ABOVE
}
//Login button pressed
-(IBAction)logInPressed:(id)sender
{
//If user logged succesful:
//[self performSegueWithIdentifier:#"LoginSuccesful" sender:self];
if (![self.userTextField.text isEqual:#""]) {
[PFUser logInWithUsernameInBackground:self.userTextField.text password:self.passwordTextField.text block:^(PFUser *user, NSError *error) {
if (user) {
//Open the wall
//[self performSegueWithIdentifier:#"LoginSuccesful" sender:self];
UIAlertView *loginAlertView = [[UIAlertView alloc] initWithTitle:#"Great!" message:#"You have logged in" delegate:nil cancelButtonTitle:#"Get roaming" otherButtonTitles:nil, nil];
[loginAlertView show];
} else {
//Something bad has ocurred
NSString *errorString = [[error userInfo] objectForKey:#"error"];
UIAlertView *errorAlertView = [[UIAlertView alloc] initWithTitle:#"Error" message:errorString delegate:nil cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[errorAlertView show];
}
}];
} else {
//Something bad has ocurred
NSString *errorString = #"You did not type any credentials!";
UIAlertView *errorAlertView = [[UIAlertView alloc] initWithTitle:#"Error" message:errorString delegate:nil cancelButtonTitle:#"Okay" otherButtonTitles:nil, nil];
[errorAlertView show];
}
}
- (IBAction)backgroundTouched:(id)sender {
[self.userTextField resignFirstResponder];
[self.passwordTextField resignFirstResponder];
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return NO;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
if (![self.slidingViewController.underLeftViewController isKindOfClass:[MenuViewController class]]) {
self.slidingViewController.underLeftViewController = [self.storyboard instantiateViewControllerWithIdentifier:#"Menu"];
}
self.slidingViewController.underRightViewController = nil;
[self.view addGestureRecognizer:self.slidingViewController.panGesture];
}
- (IBAction)revealMenu:(id)sender
{
[self.slidingViewController anchorTopViewTo:ECRight];
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.userTextField.delegate = self;
self.passwordTextField.delegate = self;
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)viewDidUnload {
[self setUserTextField:nil];
[self setPasswordTextField:nil];
[super viewDidUnload];
}
#end
I've googled, and I've googled. No-one else seems to be having an issue like this. I tried cleaning out my entire iOS Simulator and everything to no avail, following a solution that appeared to work for others. I've tried every type of segue possible and none are working.
Thanks in advance!

Answer 1

Recheck your configuration and use of the ECSlidingViewController, and it's topViewController.

Answer 2

Check in signup.xib if the UIView is connected to an outlet.