Eluss

func pureLayout() {
    scrollView.autoPinEdgesToSuperviewEdges(with: .zero)
    scrollView.autoPinEdge(.bottom, to: .bottom, of: longer, withOffset: 20)

    box.autoPinEdge(toSuperviewEdge: .top, withInset: 150)
    box.autoAlignAxis(toSuperviewAxis: .vertical)
    box.autoSetDimensions(to: CGSize(width: 100, height: 100))

    circle.autoPinEdge(.bottom, to: .bottom, of: self.view, withOffset: -20, relation: .lessThanOrEqual)
    circle.autoPinEdge(.bottom, to: .top, of: longer, withOffset: -20, relation: .lessThanOrEqual)

Eluss

func pureLayout() {
    scrollView.autoPinEdgesToSuperviewEdges(with: .zero)
    scrollView.autoPinEdge(.bottom, to: .bottom, of: longer, withOffset: 20)

    box.autoPinEdge(toSuperviewEdge: .top, withInset: 50)
    box.autoPinEdge(.left, to: .left, of: self.view, withOffset: 20)
    box.autoSetDimensions(to: CGSize(width: 100, height: 100))

    circle.autoPinEdge(.top, to: .top, of: box)
    circle.autoPinEdge(.right, to: .right, of: self.view, withOffset: -20)

Eluss

func pureLayout() {
    box.autoPinEdge(toSuperviewEdge: .top, withInset: 50)
    box.autoPinEdge(toSuperviewEdge: .left, withInset: 20)
    box.autoSetDimensions(to: CGSize(width: 100, height: 100))

    circle.autoPinEdge(.top, to: .top, of: box)
    circle.autoPinEdge(toSuperviewEdge: .right, withInset: 20)
    circle.autoSetDimensions(to: CGSize(width: 100, height: 100))

    longer.autoPinEdge(toSuperviewEdge: .left, withInset: 20)

Eluss

// weak reference, but we bet that self will not be nil
disposables += signal.observe {[unowned self] values in
  self.workWithMeAllTheTime()
}

// weak reference, but self becomes optional
disposables += signal.observe {[weak self] values in
  guard let strongSelf = self else { return }
  strongSelf.workWithMeAllTheTime()

Eluss

var disposables = CompositeDisposable()

disposables += viewModel.criticalInfo.observeValues {[unowned self] (value) in
// react to value
}

deinit {
  disposables.dispose()
}

Eluss

// public variable accessible from outside of class
var producer: SignalProducer<String, NoError>

init() {  
  producer = SignalProducer {[weak self] observer, compositeDisposable in
      guard let strongSelf = self else { return }
      compositeDisposable.add {
          print("I've been disposed! I can clean my resources ;)")
      }

Eluss

var disposables = CompositeDisposable()

disposables += viewModel.criticalInfo.observeValues {[unowned self] (value) in
// react to value
}

deinit {
  disposables.dispose()
}

Eluss

let contactTextField = UITextField()
contactTextField.delegate = self
    
func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
	displayContacts()
        return false // don't start editing
}

Eluss

func contactPicker(picker: CNContactPickerViewController, didSelectContactProperty contactProperty: CNContactProperty) {
    let contact = contactProperty.contact
    if let phoneNumber = contact.phoneNumbers.first { // We display only phone numbers, so we will have it ;)
        let phoneNumberValue = phoneNumber.value as! CNPhoneNumber 
        let result = phoneNumberValue.stringValue
        self.contactTextField.text = result
    } else {
        self.contactTextField.text = ":("
    }
}

Eluss

func displayContacts() {
    let contactPicker = CNContactPickerViewController() 
    contactPicker.delegate = self // we want to take a contact after coming back
    contactPicker.displayedPropertyKeys = [CNContactPhoneNumbersKey] // We are interested in phone numbers
    presentViewController(contactPicker, animated: true, completion: nil)
}