SEL in Swift

在我们使用Objective-c 时经常使用SEL来执行某些操作。那么在Swift中如何使用呢？在Swift中是用 #selector表示，#selector(MyViewController.tappedButton(sender:))

例如：

• Objective-c

UIButton *myButton = [UIButton new];
[myButton addTarget:self action:@selector(clickmyButton:) forControlEvents:UIControlEventTouchUpInside];

• Swift

let action = #selector(MyViewController.clickmyButton)
myButton.addTarget(self, action: action, forControlEvents: .touchUpInside)