例：

let alertAnswer = UIAlertController(title: "Input your scrabble Answer",message: nil,preferredStyle: .Alert) // or .ActionSheet

现在你有控制器,添加字段：

alertAnswer.addTextFieldWithConfigurationHandler { (get) -> Void in
            getAnswer.placeholder = "Answer"
            getAnswer.keyboardType = .Default
            getAnswer.clearsOnBeginEditing = true
            getAnswer.borderStyle = .RoundedRect
        } // add as many fields as you want with custom tweaks

添加操作按钮：

let submitAnswer = UIAlertAction(title: "Submit",style: .Default,handler: nil)
let cancel = UIAlertAction(title: "Cancel",style: .Cancel,handler: nil)
alertAnswer.addAction(submitAnswer)
alertAnswer.addAction(cancel)

随时出示控制器：

self.presentViewController(alertAnswer,animated: true,completion: nil)

如您所见,您可以使用各种处理程序在任何步骤传递自定义代码.

例如,它的外观如下：