UIButton touch up inside event hook up in coding phase?

I create a UIButton in coding phase开发者_运维问答 and never use Interface Builder so how can I call touch up inside event to hook up with any method in coding phase??

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[button addTarget:self action:@selector(BtnPressed:) forControlEvents:UIControlEventTouchUpInside];

Swift 3:

button.addTarget(self, action: #selector(ViewControllerName.BtnPressed), for: .touchUpInside)