Sigabrt when trying to display another view controller - ios

Question

I want to go to another view controller when pressing button my btnSignUp, If I write code like this I have error "sigabrt". What I should do?
import UIKit
import SnapKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor(red: 15/255, green: 52/255, blue: 100/255, alpha: 1)
createTop()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func createTop() {
let topView = UIView()
self.view.addSubview(topView)
topView.backgroundColor = UIColor(red: 15/255, green: 52/255, blue: 100/255, alpha: 1)
topView.snp_makeConstraints { (make) -> Void in
make.width.equalTo((self.view.frame.width/10)*8)
make.height.equalTo(self.view.frame.height/5)
make.centerX.equalTo(self.view)
make.top.equalTo(self.view).offset(self.view.frame.height/15)
}
let btnSignUp = UIButton()
self.view.addSubview(btnSignUp)
btnSignUp.backgroundColor = UIColor(red: 15/255, green: 52/255, blue: 100/255, alpha: 1)
btnSignUp.layer.borderColor = UIColor.whiteColor().CGColor
btnSignUp.layer.borderWidth = 1
btnSignUp.layer.cornerRadius = 6
btnSignUp.setTitle("Sign Up", forState: UIControlState.Normal)
btnSignUp.titleLabel?.font = UIFont(name: "AvenirNext-Regular", size: 17)
btnSignUp.snp_makeConstraints { (make) -> Void in
make.width.equalTo(((self.view.frame.width/10)*7)+40)
make.height.equalTo(self.view.frame.height/13)
make.top.equalTo(ORView.snp_bottom).offset(20)
make.centerX.equalTo(self.view)
}
btnSignUp.addTarget(self, action: "buttonAction", forControlEvents: UIControlEvents.TouchUpInside)
func buttonAction(sender:UIButton!)
{
let signUpVC = SignUpViewController()
self.presentViewController(signUpVC, animated: true, completion: nil)
}
}
}

Answer 1

Your action selector buttonAction doesn't match your function declaration - It takes an argument, so the selector will be buttonAction:
btnSignUp.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
Additionally, check your parentheses. It appears that your buttonAction function is declared inside func createTop()
func createTop() {
let topView = UIView()
self.view.addSubview(topView)
topView.backgroundColor = UIColor(red: 15/255, green: 52/255, blue: 100/255, alpha: 1)
topView.snp_makeConstraints { (make) -> Void in
make.width.equalTo((self.view.frame.width/10)*8)
make.height.equalTo(self.view.frame.height/5)
make.centerX.equalTo(self.view)
make.top.equalTo(self.view).offset(self.view.frame.height/15)
}
let btnSignUp = UIButton()
self.view.addSubview(btnSignUp)
btnSignUp.backgroundColor = UIColor(red: 15/255, green: 52/255, blue: 100/255, alpha: 1)
btnSignUp.layer.borderColor = UIColor.whiteColor().CGColor
btnSignUp.layer.borderWidth = 1
btnSignUp.layer.cornerRadius = 6
btnSignUp.setTitle("Sign Up", forState: UIControlState.Normal)
btnSignUp.titleLabel?.font = UIFont(name: "AvenirNext-Regular", size: 17)
btnSignUp.snp_makeConstraints { (make) -> Void in
make.width.equalTo(((self.view.frame.width/10)*7)+40)
make.height.equalTo(self.view.frame.height/13)
make.top.equalTo(ORView.snp_bottom).offset(20)
make.centerX.equalTo(self.view)
}
btnSignUp.addTarget(self, action: "buttonAction", forControlEvents: UIControlEvents.TouchUpInside)
}
func buttonAction(sender:UIButton!) {
let signUpVC = SignUpViewController()
self.presentViewController(signUpVC, animated: true, completion: nil)
}
Finally, I doubt that you want to get your new view controller by SignUpViewController() - if you are using a storyboard you want to call instantiateViewControllerWithIdentifier