App is not showing the right screen

//
//  ViewController.swift
//  FirsApp
//
//  Created by Bruno on 03/07/15.
//  Copyright (c) 2015 Bruno. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var funfactLabel: UILabel!
       let funfact = FactBook()
    let colorWheel = ColorWheel()

    @IBOutlet weak var funfacButton: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        funfactLabel.text = funfact.factsArray[0]
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func showFunFact() {
        var color = colorWheel.randomColor()
        view.backgroundColor = color
        funfacButton.tintColor = color
        funfactLabel.text = funfact.randomFact()
    }


}

//
//  ColorWheel.swift
//  FirsApp
//
//  Created by Bruno on 08/07/15.
//  Copyright (c) 2015 Bruno. All rights reserved.
//

import Foundation
import UIKit

struct ColorWheel{

    let colorsArray = [
        UIColor(red: 90/255.0, green: 187/255.0, blue: 181/255.0, alpha: 1.0), //teal color
        UIColor(red: 222/255.0, green: 171/255.0, blue: 66/255.0, alpha: 1.0), //yellow color
        UIColor(red: 223/255.0, green: 86/255.0, blue: 94/255.0, alpha: 1.0), //red color
        UIColor(red: 239/255.0, green: 130/255.0, blue: 100/255.0, alpha: 1.0), //orange color
        UIColor(red: 77/255.0, green: 75/255.0, blue: 82/255.0, alpha: 1.0), //dark color
        UIColor(red: 105/255.0, green: 94/255.0, blue: 133/255.0, alpha: 1.0), //purple color
        UIColor(red: 85/255.0, green: 176/255.0, blue: 112/255.0, alpha: 1.0), //green color
    ]

    func randomColor() -> UIColor{
        var randomNumber = Int(arc4random_uniform(UInt32 (colorsArray.count)))
        return colorsArray[randomNumber]


    }

}

    ```

funfacButton.tintColor = color