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iOS Introduction to Auto Layout in iOS Auto Layout in Code Constraints in Code

Travis Johnston
Travis Johnston
12,653 Points
Posted by Travis Johnston
Travis Johnston
12,653 Points

What am I doing wrong in this challenge?

I'm trying to match what it is looking for but it's not giving me much information as to what is wrong. It says I'm not doing all the constraints but I am.

layout.swift 
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
        let CenterX = NSLayoutConstraint(item: sampleView, attribute: .centerX, relatedBy: .equal, 
                      toItem: view, attribute: .notAnAttribute, multiplier: 1.0, constant: 0.0)

        let CenterY = NSLayoutConstraint(item: sampleView, attribute: .centerY, relatedBy: .equal, 
                      toItem: view, attribute: .notAnAttribute, multiplier: 1.0, constant: 0.0)

        let Height = NSLayoutConstraint(item: sampleView, attribute: .height, relatedBy: .equal, 
                      toItem: view, attribute: .notAnAttribute, multiplier: 1.0, constant: 50.0)

        let Width = NSLayoutConstraint(item: sampleView, attribute: .width, relatedBy: .equal, 
                     toItem: view, attribute: .notAnAttribute, multiplier: 1.0, constant: 50.0)
        view.addConstraints([CenterX, CenterY, Height, Width])

    }

}

1 Answer

Travis Johnston
Travis Johnston
12,653 Points
Travis Johnston
Travis Johnston
12,653 Points

Nevermind, I found it out that it was the 2nd attribute on the centerX and centerY