func hideKeyboardWhenTappedAround() {
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
view.addGestureRecognizer(tap)
}
func dismissKeyboard() {
view.endEditing(true)
}
}
请教上面语句中#selector(UIViewController.dismissKeyboard)
和#selector(dismissKeyboard)
有什么区别吗?我都能正常运行的啊!
如果 func 是属于同一个类,那是没什么区别,但不同的类有相同的方法名时,可以避免犯错。
#selector(UIViewController.dismissKeyboard)
这个不能用吧
你可以这样理解:
#selector(dismissKeyboard)
等价于 #selector(self.dismissKeyboard)
等价于 #selector(UIViewController.dismissKeyboard)