let alert = UIAlertController.init(title: "温馨提示", message: "you touch me", preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: "确定", style: UIAlertActionStyle.default, handler: { result in print("你点击确定") }))
alert.addAction(UIAlertAction(title: "取消", style: UIAlertActionStyle.cancel, handler: { result in print("你点击取消") }))
self.present(alert, animated: true) { }
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