Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialAnthony Kim
4,010 Pointsi can check my sample view on the X-code. can i know my fault in my code?
i can check my sample view on the X-code. can i know my fault in my code?
pllzzz help me~
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 sampleViewCenterX = NSLayoutConstraint(item: sampleView, attribute: .CenterX, relatedBy: .Equal, toItem: view, attribute: .CenterX, multiplier: 1.0, constant: 0.0)
let sampleViewCenterY = NSLayoutConstraint(item: sampleView, attribute: .CenterY, relatedBy: .Equal, toItem: view, attribute: .CenterY, multiplier: 1.0, constant: 0.0)
let sampleViewHeight = NSLayoutConstraint(item: sampleView, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .Height, multiplier: 1.0, constant: 50.0)
let sampleViewWidth = NSLayoutConstraint(item: sampleView, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .Width, multiplier: 1.0, constant: 50.0)
view.addConstraints([sampleViewCenterX, sampleViewCenterY, sampleViewHeight, sampleViewWidth])
}
}
1 Answer
Eric Hodgins
29,207 PointsYou might just need to activate the constraints. Try using: NSLayoutConstraint.activateConstraints([sampleViewCenterX, sampleViewCenterY, sampleViewHeight, sampleViewWidth])
Instead of view.addConstraints()