如何将NSMutable数组转换为Swift数组？

Question

我将ID添加到NSMutableArray之后，我希望这个MutableArrray作为Swift数组。

这里是我的代码：

var categories = NSMutableArray() 

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { 


     if (!categoryTable.hidden) 
     { 
      print("select multiple categories") 

      categoryList = categoryData[indexPath.row] 

      categories.addObject(["\(categoryList!.categoryID)"]) 

     } 
} 

func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) { 


     let listCategoryID = categoryData[indexPath.row] 

     for category in categories as [AnyObject] 
     { 

      if("\(listCategoryID.categoryID)" == category.objectAtIndex!(0) as! String) 
      { 

       categories.removeObject(category) 
      } 
     } 
     print("Catgeory ID \(categories)") 

    } 

// Convert NSMutableArray To Swift Array 
@IBAction func saveBtnPressed(sender: AnyObject) { 

     let catgID = categories as AnyObject as! [String] 
} 

输出我得到：分类标识（（27），（26））

输出我想： “27”，“26 “]

Answer 1

var catg_id:[Int] = [] 
     for category in categories as [AnyObject] 
     { 
      catg_id.append(Int(category.objectAtIndex!(0) as! NSNumber)) 

     }