Getting crash when move from on viewcontroller to VC - ios

Question

I have one home screen. And i programatically create two button with action. One will go to sign up screen , and another will go to sign in screen.
I added the both sign in and sign up storyboard identity. But when i move from that home VC to sign in VC and Sign Up VC i am getting crash:
-[ViewController pressSignUp:]: unrecognized selector sent to instance 0x7fbb3a72e3f0
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ViewController pressSignUp:]: unrecognized selector sent to instance 0x7fbb3a72e3f0'
*** First throw call stack:
Here is my code:
// create button 1
UIButton* button = [[UIButton alloc] initWithFrame:CGRectMake(0.0, self.view.frame.size.height-50, self.view.frame.size.width/2 , 50.0)];
[button setBackgroundColor:[UIColor colorWithRed:188/255.0f green:155/255.0f blue:211/255.0f alpha:0.6f]];
[button setTitle:#"Sign Up" forState:UIControlStateNormal];
[button addTarget:self action:#selector(pressSignUp:) forControlEvents:UIControlEventTouchUpInside];
[button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; // title color
[self.view addSubview:button];
// Button Two
UIButton* button1 = [[UIButton alloc] initWithFrame:CGRectMake(self.view.frame.size.width/2, self.view.frame.size.height-50, self.view.frame.size.width/2 , 50.0)];
[button1 setBackgroundColor:[UIColor colorWithRed:188/255.0f green:155/255.0f blue:211/255.0f alpha:0.6f]];
[button1 setTitle:#"Sign In" forState:UIControlStateNormal];
[button1 addTarget:self action:#selector(pressSignIn:) forControlEvents:UIControlEventTouchUpInside];
[button1 setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; // title color
[self.view addSubview:button1];
// Border color for one button
UIView *leftBorder = [[UIView alloc] initWithFrame:CGRectMake(0, 1, 1, button.frame.size.height)];
leftBorder.backgroundColor = [UIColor colorWithRed:237/255.0f green:211/255.0f blue:246/255.0f alpha:0.6f];
[button1 addSubview:leftBorder];
-(void)pressSignUp
{
UIViewController *secondViewController =
[self.storyboard instantiateViewControllerWithIdentifier:#"SignUpViewController"];
[self presentModalViewController:secondViewController animated:YES];
// Here You can write functionality
}
-(void)pressSignIn
{
UIViewController *secondViewController =
[self.storyboard instantiateViewControllerWithIdentifier:#"SignInViewController"];
[self presentModalViewController:secondViewController animated:YES];
// Here You can write functionality
}
Why i am getting that crash.It any possible to move to Another Vc.
Please help thanks

Answer 1

You forget to implement the parameter for the sender:
-(void)pressSignUp:(UIButton*) sender {
}
-(void)pressSignIn:(UIButton*) sender {
}
And maybe you did not set the identifier in the interface builder:
It's under the Identity Inspector tab in IB. It's called "Storyboard ID". E.g.: SignUpViewController