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558 PointsCompiler error says UIView has no member layoutMarginsGuide
While trying to write view.layoutMarginsGuide, it shows compiler error
class MyViewController: UIViewController {
let blueView = UIView()
let greenView = UIView()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(greenView)
view.addSubview(blueView)
}
override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
blueView.translatesAutoresizingMaskIntoConstraints = false
greenView.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
NSLayoutConstraint(item: blueView, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 100.0),
NSLayoutConstraint(item: blueView, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 150.0),
NSLayoutConstraint(item: blueView, attribute: .left, relatedBy: .equal, toItem: view, attribute: .leftMargin, multiplier: 1.0, constant: 8.0),
NSLayoutConstraint(item: blueView, attribute: .top, relatedBy: .equal, toItem: self.topLayoutGuide, attribute: .bottom, multiplier: 1.0, constant: 8.0),
NSLayoutConstraint(item: blueView, attribute: .right, relatedBy: .equal, toItem: view, attribute: .rightMargin, multiplier: 1.0, constant: -8.0)
])
let margins = view.layoutMarginsGuide
// Add constraint code below
NSLayoutConstraint.activate([
greenView.bottomAnchor.constraint(equalTo: margins.bottomAnchor, constant: 8.0),
greenView.leadingAnchor.constraint(equalTo: margins.leadingAnchor, constant: 8.0),
greenView.trailingAnchor.constraint(equalTo:margins.trailingAnchor, constant: 8.0),
greenView.heightAnchor.constraint(equalToConstant: 75.0)
])
}
}