Swift 基本控件UIAlertView学习

let alertView = UIAlertView()
alertView.title = "系统提示"
alertView.message = "您确定要离开hangge.com吗？"
alertView.addButtonWithTitle("取消")
alertView.addButtonWithTitle("确定")
alertView.cancelButtonIndex=0
alertView.delegate=self;
alertView.show()

func alertView(alertView:UIAlertView, clickedButtonAtIndex buttonIndex: Int){
if(buttonIndex==alertView.cancelButtonIndex){
print("点击了取消")
}
else
{
print("点击了确认")
}
}