         super.init(coder: aDecoder)
     }
     
-    func up(sender: AnyObject) {
+    func up() {
         Drop.up(self)
     }
     

                drop.layoutIfNeeded()
            }, completion: nil)
    }
}

extension Drop {

    }
    
    class func down(type: DropType, status: String) {
        self.upAll()
        if let window = window() {
            let drop = Drop(frame: CGRectZero)
            window.addSubview(drop)
