Swift开发：UIAlertController 弹框

let alert =UIAlertController(title:"警告",message:"是否要删除当前设备?",preferredStyle: .Alert);

let btnOk = UIAlertAction(title:"确定",style: .Default) { (UIAlertAction) ->Void in

print("确定操作！");

}

let btnCancel = UIAlertAction(title:取消",style: .Cancel) { (UIAlertAction) ->Void in

print("取消操作！");

}

alert.addAction(btnOk);

alert.addAction(btnCancel);

self.presentViewController(alert,animated:true,completion: nil);

效果图