Change a constraints constant using code - ios

Question

I am creating this generic base code for all my views, It creates an ad bar that flows across all my pages. I have just included some code from the best answer to this Question and I cant work out why it doesn't work. I am trying to make it so if the adBanner doesn't load my labels stretch out and take up that space.
I apologise if this is obvious but I am new to this.
Here is my code
import Foundation
import UIKit
import iAd
class dayPicker: UIViewController , ADBannerViewDelegate{
var UIiAd: ADBannerView = ADBannerView()
var SH = UIScreen.mainScreen().bounds.height
var AH = CGFloat()
#IBOutlet var constOne: NSLayoutConstraint!
#IBOutlet var constTwo: NSLayoutConstraint!
func appdelegate() -> AppDelegate {
return UIApplication.sharedApplication().delegate as! AppDelegate
}
override func viewWillDisappear(animated: Bool) {
UIiAd.delegate = nil
UIiAd.removeFromSuperview()
}
func bannerViewDidLoadAd(banner: ADBannerView!) {
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationDuration(1)
UIiAd.alpha = 1
AH = 50
UIView.commitAnimations()
self.constOne.constant == 58
self.constTwo.constant == 58
}
func bannerView(banner: ADBannerView!, didFailToReceiveAdWithError error: NSError!) {
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationDuration(1)
UIiAd.alpha = 0
AH = 0
UIView.commitAnimations()
self.constOne.constant == 8
self.constTwo.constant == 8
}
override func viewWillAppear(animated: Bool) {
UIiAd.delegate = self
UIiAd = self.appdelegate().UIiAd
UIiAd.frame = CGRectMake(0, SH - AH , 0, 0)
self.view.addSubview(UIiAd)
}
}

Answer 1

You are giving == instead of = while assigning.
import Foundation
import UIKit
import iAd
class dayPicker: UIViewController , ADBannerViewDelegate{
var UIiAd: ADBannerView = ADBannerView()
var SH = UIScreen.mainScreen().bounds.height
var AH = CGFloat()
#IBOutlet var constOne: NSLayoutConstraint!
#IBOutlet var constTwo: NSLayoutConstraint!
func appdelegate() -> AppDelegate {
return UIApplication.sharedApplication().delegate as! AppDelegate
}
override func viewWillDisappear(animated: Bool) {
UIiAd.delegate = nil
UIiAd.removeFromSuperview()
}
func bannerViewDidLoadAd(banner: ADBannerView!) {
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationDuration(1)
UIiAd.alpha = 1
AH = 50
UIView.commitAnimations()
self.constOne.constant = 58
self.constTwo.constant = 58
}
func bannerView(banner: ADBannerView!, didFailToReceiveAdWithError error: NSError!) {
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationDuration(1)
UIiAd.alpha = 0
AH = 0
UIView.commitAnimations()
self.constOne.constant = 8
self.constTwo.constant = 8
}
override func viewWillAppear(animated: Bool) {
UIiAd.delegate = self
UIiAd = self.appdelegate().UIiAd
UIiAd.frame = CGRectMake(0, SH - AH , 0, 0)
self.view.addSubview(UIiAd)
}
}