更改视图背景颜色

我想更改视图的文字和背景颜色。引号正在改变，但视图背景颜色不会改变。我究竟做错了什么？更改视图背景颜色

下面是代码：

import UIKit  // UI: user interface 

class ViewController: UIViewController { 

// IB: Interface Builder 
@IBOutlet weak var quoteLabel: UILabel! 

var quotes = Quotes() 


// gets called when the view is loaded 
override func viewDidLoad() { 
    super.viewDidLoad() 
    // Do any additional setup after loading the view, typically from a nib. 
} 

// Interface Builder Action. 
// Gets called whenever the user taps on the button 
@IBAction func inspireMeDidTap(sender: UIButton) 
{ 
    let quote = quotes.randomQuote() 
    quoteLabel.text = quote 

    // change the background color of the view 
    view.backgroundColor = randomColor() 
} 

func randomColor() -> UIColor 
{ 
    let random = Int(arc4random()) % 5 // 0 -> 4 
    switch random { 
    case 0: return UIColor(red: 211/255.0, green: 86/255.0, blue: 87/255.0, alpha: 0) 
    case 1: return UIColor(red: 71/255.0, green: 178/255.0, blue: 137/255.0, alpha: 0) 
    case 2: return UIColor(red: 229/255.0, green: 177/255.0, blue: 93/255.0, alpha: 0) 
    case 3: return UIColor(red: 92/255.0, green: 163/255.0, blue: 178/255.0, alpha: 0) 
    case 4: return UIColor(red: 38/255.0, green: 38/255.0, blue: 38/255.0, alpha: 0) 
    default: return UIColor(red: 56/255.0, green: 72/255.0, blue: 72/255.0, alpha: 0) 
    } 

} 

}

来源

2015-06-09 Niklas Jordan

不要发布你的代码的图片。用相关代码的实际文本更新您的问题。确保它的格式也正确。 – rmaddy

对不起。我改变了它。 –

你的代码工作正常，我没有看到任何问题。 –