/Swift/Swift set constraint programmatically

Swift set constraint programmatically

Swift edit constraint programmatically

yourHeightConstraintOutlet.constant = someValue
yourView.layoutIfNeeded()

Swift set constraint programmatically

override func viewDidLoad() {
    let newView = UIView()
    newView.backgroundColor = UIColor.red
    view.addSubview(newView)

    newView.translatesAutoresizingMaskIntoConstraints = false
    NSLayoutConstraint(item: newView, attribute: NSLayoutConstraint.Attribute.centerX, relatedBy: NSLayoutConstraint.Relation.equal, toItem: view, attribute: NSLayoutConstraint.Attribute.centerX, multiplier: 1, constant: 0).isActive = true
    NSLayoutConstraint(item: newView, attribute: NSLayoutConstraint.Attribute.centerY, relatedBy: NSLayoutConstraint.Relation.equal, toItem: view, attribute: NSLayoutConstraint.Attribute.centerY, multiplier: 1, constant: 0).isActive = true
    NSLayoutConstraint(item: newView, attribute: NSLayoutConstraint.Attribute.width, relatedBy: NSLayoutConstraint.Relation.equal, toItem: nil, attribute: NSLayoutConstraint.Attribute.notAnAttribute, multiplier: 1, constant: 100).isActive = true
    NSLayoutConstraint(item: newView, attribute: NSLayoutConstraint.Attribute.height, relatedBy: NSLayoutConstraint.Relation.equal, toItem: nil, attribute: NSLayoutConstraint.Attribute.notAnAttribute, multiplier: 1, constant: 100).isActive = true
}

Similar codes

0 vote262 views1 answer
Swift Markup in Xcode 11
Swift
1 vote204 views1 answer
White or light ASAuthorizationAppleIDButton “Sign in with Apple” button - Swift
Swift
0 vote231 views1 answer
How to check if not running in debufgger swift
Swift
0 vote243 views1 answer
Duplicate modifier swiftui error
Swift
1 vote194 views1 answer
Swift play video in uiview
Swift
0 vote216 views1 answer
How to debug before app launch swift
Swift
0 vote231 views1 answer
Microsoft flight simulator uses which language
Swift
0 vote204 views2 answers
Float vs double in swift
Swift
1 vote245 views1 answer
How can i play video with url in a view in swift
Swift
0 vote220 views2 answers
Bold world in text swift
Swift