/Swift/Swift edit 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 vote259 views1 answer
Swift variable in a string
Swift
6 votes267 views2 answers
Swiftui foreach
Swift
1 vote246 views1 answer
Get hours difference between two dates swift
Swift
0 vote254 views1 answer
Parse int in swift
Swift
0 vote240 views1 answer
Delay code execution swift 5
Swift
1 vote251 views1 answer
Replace character in swift
Swift
0 vote253 views1 answer
How to style textfield swiftui
Swift
0 vote258 views1 answer
Rxswift combine two observables
Swift
0 vote255 views1 answer
Check if array contains value swift
Swift
0 vote260 views1 answer
Convert image to base64 in swift ui
Swift