CODEWITHSUNDEEP
swiftxcode
e.iluf
e.iluf

Reputation: 1659

Swift Compiler Error : Command failed due to signal: Segmentation fault: 11

I am new to Xcode and swift but I have been able to narrow the error source down to this line of code. I have searched every where but could not find the solution. I'm currently using Xcode 8.1. 

        button.addTarget( self, action: #selector(handleRegister), for:.touchUpInside)

this is some of my code 

import UIKit

class LoginController: UIViewController {

let backGroundImageView: UIImageView = {
    let imageView = UIImageView()
    imageView.image = UIImage(named: "backgrd_image")
    return imageView
}()

let inputsContainerView: UIView = {
    let view = UIView()
    view.backgroundColor = UIColor.white
    view.translatesAutoresizingMaskIntoConstraints = false
    view.layer.cornerRadius = 5
    view.layer.masksToBounds = true
    return view

}()

    let loginRegisterButton: UIButton = {
    let button = UIButton(type: .system)
    button.backgroundColor = UIColor(r: 80, g: 101, b: 161)
    button.setTitle("Register", for: .normal)
    button.setTitleColor(UIColor.white, for: .normal)
    button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 16)
    button.translatesAutoresizingMaskIntoConstraints = false

    button.addTarget( self, action: #selector(handleRegister), for:.touchUpInside)
    return button
}()

// when register button is clicked, printout 123
func handleRegister() {
    print(123)

}

does anyone know what could be causing this Segmentation fault: 11 error.

Upvotes: 3

Views: 1008

Answers (3)

mut tony
mut tony

Reputation: 407

To use self, you will have to use "lazy var" instead of "let" on the first line like below. Within the function, self refers to the function "loginRegisterButton", using "lazy var", self will refer to your controller

lazy var loginRegisterButton: UIButton = {
  let button = UIButton(type: .system)
  button.backgroundColor = UIColor(r: 80, g: 101, b: 161)
  button.setTitle("Register", for: .normal)
  button.setTitleColor(UIColor.white, for: .normal)
  button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 16)
  button.translatesAutoresizingMaskIntoConstraints = false

  button.addTarget( self, action: #selector(handleRegister), for:.touchUpInside)
return button
}()

Upvotes: 0

Ahmed Alshareef
Ahmed Alshareef

Reputation: 1

Delete this line: 

 button.addTarget( self, action: #selector(handleRegister), for:.touchUpInside)

and write it in the viewDidLoad function

Upvotes: 0

Andrey
Andrey

Reputation: 487

IMHO the reason is that you use "self" in "button.addTarget( self, action: #selector(handleRegister), for:.touchUpInside)". To check that you could insert "nil" instead of "self". And further after you try inserting "nil", you could add "print(self)" to understand that "self" is referring not to "LoginController" as you intended.

Upvotes: 2

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