Ios MFMailComposeViewControllerDelegate不符合协议NSObjectProtocol

我正在尝试使用我制作的

MFMailComposeViewController

从我的应用程序发送电子邮件：

func sendMail() {
        if (MFMailComposeViewController.canSendMail()) {
            let mail = MFMailComposeViewController()
            mail.mailComposeDelegate = self
            mail.setToRecipients([self.customerMail?.first ?? ""])

        } else {

        }
    }

extension MyViewController: MFMailComposeViewControllerDelegate {
    func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {

    }
}

因此，我必须添加协议

MFMailComposeViewControllerDelegate

，我这样做：

func sendMail() {
        if (MFMailComposeViewController.canSendMail()) {
            let mail = MFMailComposeViewController()
            mail.mailComposeDelegate = self
            mail.setToRecipients([self.customerMail?.first ?? ""])

        } else {

        }
    }

extension MyViewController: MFMailComposeViewControllerDelegate {
    func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {

    }
}

那么为什么编译器要我添加

NSObjectProtocol

如果我看到

MFMailComposeViewControllerDelegate

在他的协议中只有一个方法，那么为什么我要添加所有这些委托：

extension CustomersDetailPresenter: MFMailComposeViewControllerDelegate {
    func isEqual(_ object: Any?) -> Bool {
        <#code#>
    }

    var hash: Int {
        <#code#>
    }

    var superclass: AnyClass? {
        <#code#>
    }

    func `self`() -> Self {
        <#code#>
    }

    func perform(_ aSelector: Selector!) -> Unmanaged<AnyObject>! {
        <#code#>
    }

    func perform(_ aSelector: Selector!, with object: Any!) -> Unmanaged<AnyObject>! {
        <#code#>
    }

    func perform(_ aSelector: Selector!, with object1: Any!, with object2: Any!) -> Unmanaged<AnyObject>! {
        <#code#>
    }

    func isProxy() -> Bool {
        <#code#>
    }

    func isKind(of aClass: AnyClass) -> Bool {
        <#code#>
    }

    func isMember(of aClass: AnyClass) -> Bool {
        <#code#>
    }

    func conforms(to aProtocol: Protocol) -> Bool {
        <#code#>
    }

    func responds(to aSelector: Selector!) -> Bool {
        <#code#>
    }

    var description: String {
        <#code#>
    }

    func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {

    }
}

扩展CustomerDetailPresenter:MFMailComposeViewControllerDelegate{
func isEqual（uObject:Any？）->Bool{
}
var散列：Int{
}
var超类：AnyClass{
}
func`self`（）->self{
}
func perform（uaselector:Selector！）->非托管{
}
func-perform（uaselector:Selector！，带对象：Any！）->非托管{
}
func-perform（uaselector:Selector！，with-object1:Any！，with-object2:Any！）->非托管{
}
func isProxy（）->Bool{
}
func isKind（属于aClass:AnyClass）->Bool{
}
func isMember（属于aClass:AnyClass）->Bool{
}
func符合（协议）->Bool{
}
func响应（对选择器：选择器！）->Bool{
}
变量说明：字符串{
}
func-mailcomosecontroller（u控制器：mfmailcomoseviewcontroller，didFinishWith结果：MFMailComposeResult，错误：error？）{
}
}

怎么了？为什么我要添加所有这些我不需要使用的委托？如果我必须使用此委托，我应该在需要返回值的委托中插入什么？

---

感谢您

无论您在哪里使用

MFMailComposeViewControllerDelegate

，您声明的符合

MFMailComposeViewControllerDelegate

的类也需要符合NSObjectProtocol

您可以从NSObject继承来修复此问题

class CustomersDetailPresenter: NSObject

class MyViewController: UIViewController, NSObject

---

请共享

CustomerDetailPresenter

的代码