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4,382 Points[Help!] What is wrong with my constraint?
The bummer keeps saying that I haven't linked it to the parent view...can someone tell me what the syntax for it is? Thanks!
class MyViewController: UIViewController {
let sampleView = UIView()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(sampleView)
}
override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
sampleView.translatesAutoresizingMaskIntoConstraints = false
// Add constraints below
func setUpsampleViewConstraints() {
sampleView.translatesAutoresizingMaskIntoConstraints = false
}
let sampleViewHeightConstraint = NSLayoutConstraint(item: sampleView, attribute: .Height, relatedBy: .Equal,
toItem: nil, attribute: .CenterX, multiplier: 1.0, constant: 50.0)
let sampleViewWidthConstraint = NSLayoutConstraint(item: sampleView, attribute: .Width, relatedBy: .Equal,
toItem: nil, attribute: .CenterX, multiplier: 1.0, constant: 50.0)
let sampleViewCenterXConstraint = NSLayoutConstraint(item: sampleView, attribute: .CenterX, relatedBy: .Equal,
toItem: nil, attribute: .CenterX, multiplier: 1.0, constant: 0.0)
view.addConstraints([
sampleViewHeightConstraint,
sampleViewWidthConstraint,
sampleViewCenterXConstraint
])
}
}
1 Answer
Jairo Eli de Leon
5,182 PointsSame here, I am not sure what the problem is. So I took few video lessons and then back to this challenge again but this time I created constraints using layout anchors. It worked for me!
NSLayoutConstraint.activateConstraints([
sampleView.heightAnchor.constraintEqualToConstant(50.0),
sampleView.widthAnchor.constraintEqualToConstant(50.0),
sampleView.centerXAnchor.constraintEqualToAnchor(view.centerXAnchor),
sampleView.centerYAnchor.constraintEqualToAnchor(view.centerYAnchor)
])