             layoutButtonBackTop,
             layoutButtonBackBottom,
             layoutButtonBackLeft,
-            layoutButtonBackRight])
+            layoutButtonBackWidth])
+    }
+    
+    //MARK: actions
+    
+    func actionBack(sender button:UIButton)
+    {
+        
     }
 }

        
        let layoutButtonBackTop:NSLayoutConstraint = NSLayoutConstraint.topToTop(
            view:buttonBack,
            toView:self)
        let layoutButtonBackBottom:NSLayoutConstraint = NSLayoutConstraint.bottomToBottom(
            view:buttonBack,
            toView:self)
        let layoutButtonBackLeft:NSLayoutConstraint = NSLayoutConstraint.leftToLeft(
            view:buttonBack,
            toView:self)
        let layoutButtonBackRight:NSLayoutConstraint = NSLayoutConstraint.rightToRight(
            view:buttonBack,
            toView:self)
        
        addConstraints([
            layoutBackgroundHeight,

{
    private weak var controller:CHome!
    private let kBackgroundHeight:CGFloat = 50
    private let kButtonBackWidth:CGFloat = 60
    
    convenience init(controller:CHome)
    {
