swift中UIActionSheet的使用

// 方法1
let alertSheet = UIActionSheet(title: alertTitle,delegate: nil,cancelButtonTitle: alertOK,destructiveButtonTitle: alertCancel)
alertSheet.showInView(self.view)

// 方法2
// 实例化时添加代理对象，同时注意添加协议
let alertSheet = UIActionSheet(title: alertTitle,delegate: self,destructiveButtonTitle: alertCancel,otherButtonTitles: "警告","提示","通告")
alertSheet.showInView(self.view)

// 添加协议
class ViewController: UIViewController,UIActionSheetDelegate {
    
    override func viewDidLoad() {
        ...
    }
    ...
}

// 代理方法
// MARK: UIActionSheetDelegate
func actionSheet(actionSheet: UIActionSheet,clickedButtonAtIndex buttonIndex: Int) {
        let buttonTitle = actionSheet.buttonTitleAtIndex(buttonIndex)
        if buttonTitle == alertCancel
        {
            print("你点击了退出")
        }
        else if buttonTitle == alertOK
        {
            print("你点击了确定")
        }
        else
        {
            print("你点击了其他")
        }
}

// 方法3
// 1 实例化
let alertSheet = UIAlertController(title: alertTitle,message: alertMessage,preferredStyle: UIAlertControllerStyle.ActionSheet)
// 2 命令（样式：退出Cancel，警告Destructive-按钮标题为红色，默认Default）
let cancelAction = UIAlertAction(title: alertCancel,style: UIAlertActionStyle.Cancel,handler: nil)
let deleteAction = UIAlertAction(title: "删除",style: UIAlertActionStyle.Destructive,handler: nil)
let archiveAction = UIAlertAction(title: alertOK,style: UIAlertActionStyle.Default,handler: {
            action in
            print("OK")
})
alertSheet.addAction(cancelAction)
alertSheet.addAction(deleteAction)
alertSheet.addAction(archiveAction)
// 3 跳转
self.presentViewController(alertSheet,animated: true,completion: nil)