Nothing happens but why ???
@IBOutlet weak var button10: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
button10.center = CGPoint(x: self.view.frame.x/2, y: self.view.frame.y/2)
}
Add constraints for center in view
var constX = NSLayoutConstraint(item: button10, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: view, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0)
view.addConstraint(constX)
var constY = NSLayoutConstraint(item: button10, attribute: NSLayoutAttribute.CenterY, relatedBy: NSLayoutRelation.Equal, toItem: view, attribute: NSLayoutAttribute.CenterY, multiplier: 1, constant: 0)
view.addConstraint(constY)
As Ashhish said, add two constraints between the parent view and the button. But this can also be done using the awesome Github project Cartography:
Very neat!
You can include Cartography using Cocoapods.