/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 vote218 views1 answer
Swift print struct name
Swift
0 vote213 views1 answer
Navigationbar large title swift
Swift
0 vote223 views1 answer
Swift repeating array
Swift
0 vote232 views2 answers
Update parent vc from child controller swift 5
Swift
0 vote224 views1 answer
Store multiple items in one core data record
Swift
0 vote202 views1 answer
Octobercms add extra slash to css url
Swift
36 votes564 views6 answers
Mailto
Swift
0 vote250 views1 answer
Convert dictionary to array swift
Swift
1 vote200 views1 answer
Swift programming language wikipedia
Swift
0 vote203 views1 answer
How to unwrap arrays with optional value in swift
Swift