在Singleton中的func不起作用

Question

由於標題暗示我發生在一個單身人士有趣的小問題。這是我的代碼：

import UIKit 

class InterfaceManager: NSObject 
{ 
    class var sharedInstance: InterfaceManager 
    { 
     get 
     { 
      struct Static 
      { 
      static var instance: InterfaceManager? = nil 
      static var token: dispatch_once_t = 0 
      } 
      dispatch_once(&Static.token) { Static.instance = InterfaceManager() 
      } 
      return Static.instance! 
     } 
    } 

    func chooseAttributedString(string: NSString, font: UIFont, color: UIColor) 
    { 
     let string: NSString = string 
     var stringMutable = NSMutableAttributedString() 
     stringMutable = NSMutableAttributedString(string: string as String , attributes: [NSFontAttributeName: font, NSForegroundColorAttributeName: color]) 
    } 
} 

，但是當我要調用的方法，在類的Xcode給我一個錯誤「外來參數標籤‘字符串’呼叫」。下面我行代碼：

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell 
    { 
     let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! CellSquadreController 
     let squadra = DataManager.sharedInstance.arrayCori[indexPath.row] 

     cell.backgroundColor = UIColor.clearColor() 
     cell.nomeSquadra.attributedText = InterfaceManager.sharedInstance.chooseAttributedString(string: squadra.nome, font: UIFont(name: "Noteworthy-Light", size: 23)!, color: UIColor.whiteColor()) 
     return cell 
    } 

PS：我剛剛修訂了小失誤，但但它仍然沒有工作...

Answer 1

你忘了訪問sharedInstance：

InterfaceManager.sharedInstance.chooseAttributedString(squadra.nome, font: UIFont(name: "Noteworthy-Light", size: 23)!, color: UIColor.whiteColor())