         buttonUncheckAll.imageView!.tintColor = UIColor(white:0, alpha:0.1)
         buttonUncheckAll.imageView!.clipsToBounds = true
         buttonUncheckAll.imageView!.contentMode = UIViewContentMode.center
+        self.buttonUncheckAll = buttonUncheckAll
         
         let buttonTrash:UIButton = UIButton()
         buttonTrash.translatesAutoresizingMaskIntoConstraints = false

        buttonTrash.imageView!.tintColor = UIColor(white:0, alpha:0.1)
        buttonTrash.imageView!.clipsToBounds = true
        buttonTrash.imageView!.contentMode = UIViewContentMode.center
        
        addSubview(buttonCheckAll)
        addSubview(buttonUncheckAll)

        buttonCheckAll.imageView!.tintColor = UIColor(white:0, alpha:0.1)
        buttonCheckAll.imageView!.clipsToBounds = true
        buttonCheckAll.imageView!.contentMode = UIViewContentMode.center
        self.buttonCheckAll = buttonCheckAll
        
        let buttonUncheckAll:UIButton = UIButton()
        buttonUncheckAll.translatesAutoresizingMaskIntoConstraints = false
