Xcode - 无法采用协议 [英] Xcode - Cannot Adopt Protocol

问题描述

对此的帮助将不胜感激.

我想从 iOS 中的应用程序内发送短信.

在 Xcode 中，我完成了以下操作:

在Link Binary With Library中添加了一个参考:

MessageUI.framework

在 ViewController.swift 中，我添加了导入:

import MessageUI

但是，当我尝试添加委托时...

class ViewController: UIViewController, MFMessageComposeViewControllerDelegate {覆盖 func viewDidLoad() {super.viewDidLoad()//在加载视图后做任何额外的设置，通常是从笔尖.}覆盖 func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()//处理任何可以重新创建的资源.}}

我收到此错误:

类型 'ViewController' 不符合协议 'MFMessageComposeViewControllerDelegate'

<小时>

更新

按照安东尼奥的建议解决了.我添加了这个:

func messageComposeViewController(controller: MFMessageComposeViewController!, didFinishWithResult 结果: MessageComposeResult) {}

解决方案

这意味着您还没有实现协议中定义的方法.查看文档以了解您必须实施的内容.>

在这种情况下，它只是一种方法:

func messageComposeViewController(_ controller: MFMessageComposeViewController!, didFinishWithResult result: MessageComposeResult)

Help on this would be much appreciated.

I would like to send an SMS message from within an app in iOS.

In Xcode, I have done the following:

Added a reference in Link Binary With Library:

MessageUI.framework

In ViewController.swift I have added the import:

import MessageUI

However, when I try to add the delegate ...

class ViewController: UIViewController, MFMessageComposeViewControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

I get this error:

Type 'ViewController' does not conform to protocol 'MFMessageComposeViewControllerDelegate'

---

Update

Solved by following Antonio's advice. I added this:

func messageComposeViewController(controller: MFMessageComposeViewController!, didFinishWithResult result: MessageComposeResult) {
}

解决方案

That means you have not implemented the methods defined in the protocol. Look at the documentation to know what you have to implement.

In this case, it's just a method:

func messageComposeViewController(_ controller: MFMessageComposeViewController!, didFinishWithResult result: MessageComposeResult)

这篇关于Xcode - 无法采用协议的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！