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

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

        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
