【已解决】swift 3：Use ‘#selector’ instead of explicitly constructing a ‘Selector’

代码：

registerButton.addTarget(self, action: Selector("registerAction"), forControlEvents: UIControlEvents.TouchUpInside)

警告：

Use ‘#selector’ instead of explicitly constructing a ‘Selector’

改为：

// registerButton.addTarget(self, action: Selector("registerAction"), forControlEvents: UIControlEvents.TouchUpInside)

registerButton.addTarget(self, action: #selector(RegisterUsernameViewController.registerAction), forControlEvents: UIControlEvents.TouchUpInside)

即可。

还有类似的问题：

代码：

let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "dismissKeyboard")

self.view.addGestureRecognizer(tap)

警告：

Use of string literal for Objective-C selectors is deprecated; use ‘#selector’ instead

改为：

let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(LoginViewController.dismissKeyboard))

即可。