swift – 如何在UIAlertController中更改一个UIAlertAction文本

这是我的UIAlertController代码：我想将Delete UIAlertAction文本颜色更改为红色.

//Alert to select more method
func moreAlert()
{           
    let optionMenu = UIAlertController(title: "Mere",message: "",preferredStyle: UIAlertControllerStyle.ActionSheet)

    let Edit = UIAlertAction(title: "Rediger",style: .Default,handler: { action in

    })


    let Delete = UIAlertAction(title: "Slet",handler: { action in

    })

    let cancelAction = UIAlertAction(title: "Annullere",style: .Cancel,handler: { action in        
        print("Cancelled")
    })

    optionMenu.addAction(Edit)            
    optionMenu.addAction(Delete)            
    optionMenu.addAction(cancelAction)


    self.presentViewController(optionMenu,animated: true,completion: nil)
}