将操作添加到标准文本库 UIBarButtonItem

Question

我相信我已经按照其他 SO 线程的步骤在点击 UIBarButtonItem 时通过另一种方法调用操作，但是我不断收到以下错误Argument of '#selector' does not refer to an '@objc' method, property, or initializer并且错误突出显示#selector文本。

这是设置按钮：

navigationItem.rightBarButtonItem = UIBarButtonItem(title: "(barButtonItemText)", style: .done, target: self, action: #selector(inviteMethod(inviteMethod: inviteMethodSelected!)))

这是我在点击按钮时尝试运行的方法：

func inviteMethod (inviteMethod:String) {
let inviteMethod = inviteMethod
if inviteMethod == "email" {
inviteViaEmail(invitedContacts: self.invitedContacts)
}
else {
inviteViaText(invitedContacts: self.invitedContacts)  
}  }

邀请方法之一的示例(如果有帮助(

func inviteViaEmail (invitedContacts:[Contact]) {
var invitedContactsEmails:[String] = []
for contactEmails in invitedContacts {
let emailAddress = contactEmails.emailAddress ?? ""
invitedContactsEmails.append(emailAddress)
}
let mc = MFMailComposeViewController()
mc.mailComposeDelegate = self as? MFMailComposeViewControllerDelegate
mc.setToRecipients(invitedContactsEmails)
mc.setSubject("Invite for Gallery App, Event (event?.eventName)")
mc.setMessageBody("This is a test invite email nn(event?.eventHost) has invited you to join their event", isHTML: false)
self.present(mc, animated: true, completion: nil)
}

Answer 1

UIBarButtonItem的动作 - 以及所有其他UIControl对象 - 可以采用一个参数，该参数是对象本身或没有参数。

关联的方法是

@objc func inviteMethod()

或

@objc func inviteMethod(_ sender : UIBarButtonItem)

不支持任何自定义参数

---

你必须这样初始化按钮：

navigationItem.rightBarButtonItem = UIBarButtonItem(title: "(barButtonItemText)", 
style: .done, 
target: self, 
action: #selector(inviteMethod))