swift 创建第一个UIAlertView 和UIActionSheet

//创建 UIActionSheet

／／一定要指明类型。不编译不通过

func ActionSheet(sender:UITapGestureRecognizer)
??? {
??????? let actionSheet: UIActionSheet = UIActionSheet(title:"Are you sure?", delegate:self, cancelButtonTitle:"Cancel", destructiveButtonTitle:"Yes,I‘m sure!");
??????? actionSheet.showInView(self.view)
?????? ?
??? }

//actionSheet delegate
??? func actionSheet(actionSheet: UIActionSheet, clickedButtonAtIndex buttonIndex: Int) {
??????? if buttonIndex == 0{
??????????? println("点击位置为\(buttonIndex)")
??????? }
??? }

//创建UIAlertView

func firstSwift(sender:UIButton)
??? {
?????? println("第一个button的点击事件")
?????? self.label1.text = "button点击了"
?????? var alert = UIAlertView(title: "?", message: "button被点击了", delegate: self, cancelButtonTitle: "知道了")
?????? alert.show()
??? }