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Start your free trialkevinong
Courses Plus Student 8,194 PointsGet error: value of type 'UIView' has no member 'layoutMarginsGuide' when using view.layoutMarginsGuide. Why?
swift_lint.swift:353:50: error: value of type 'UIView' has no member 'layoutMarginsGuide' greenView.leftAnchor.constraintEqualToAnchor(view.layoutMarginsGuide.leftAnchor, constant: 8.0),
My Code:
NSLayoutConstraint.activateConstraints([ greenView.topAnchor.constraintEqualToAnchor(blueView.bottomAnchor, constant: 8.0), greenView.leftAnchor.constraintEqualToAnchor(view.layoutMarginsGuide.leftAnchor, constant: 8.0), greenView.rightAnchor.constraintEqualToAnchor(view.layoutMarginsGuide.rightAnchor, constant: -8.0), greenView.heightAnchor.constraintEqualToConstant(75.0) ])
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.activateConstraints([
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)
])
// Add constraint code below
}
}
2 Answers
Jari Koopman
Python Web Development Techdegree Graduate 29,349 PointsHi Kevin,
I'm not completely sure, but I think the ViewController has the layout guides, so you would call them on self like this:
self.layoutMarginsGuide.rightAnchor
I hope this helped you!
Regards, Jari
kevinong
Courses Plus Student 8,194 PointsThanks! I will give that a try.