AutoLayout code button margine

AutoLayout code button margine

self.textView.becomeFirstResponder()
        
        let baseView = UIView()
        baseView.setTranslatesAutoresizingMaskIntoConstraints(false)
        baseView.backgroundColor = UIColor.orangeColor()
        
        self.textView.inputView = baseView
        
        NSLog("frame wisth%f, height", baseView.frame.size.width, baseView.frame.size.height)
        
        let button = UIButton()
        button.setTitle("Button", forState: .Normal)
        button.setTranslatesAutoresizingMaskIntoConstraints(false)
        button.backgroundColor = UIColor.blueColor()
        baseView.addSubview(button)
        
        let button2 = UIButton()
        button2.setTitle("Button 2", forState: .Normal)
        button2.setTranslatesAutoresizingMaskIntoConstraints(false)
        button2.backgroundColor = UIColor.redColor()
        baseView.addSubview(button2)

        
        baseView.addConstraint(NSLayoutConstraint(
            item: button,
            attribute: .Top,
            relatedBy: .Equal,
            toItem: baseView,
            attribute: .Top,
            multiplier: 1,
            constant: 0))
        
        baseView.addConstraint(NSLayoutConstraint(
            item: button2,
            attribute: .Top,
            relatedBy: .Equal,
            toItem: baseView,
            attribute: .Top,
            multiplier: 1,
            constant: 0))
        
        baseView.addConstraints(
            NSLayoutConstraint.constraintsWithVisualFormat(
            "V:[button]",
            options: NSLayoutFormatOptions.allZeros,
            metrics: nil,
            views: ["button" : button])
        )
        
        baseView.addConstraints(
            NSLayoutConstraint.constraintsWithVisualFormat(
                "H:[button][button2]",
                options: NSLayoutFormatOptions.allZeros,
                metrics: nil,
                views: ["button" : button ,"button2" : button2])
        )