使用 CallKit 接听电话时如何显示 ViewController [英] How to display a ViewController when answering a call with CallKit

问题描述

我已按照以下教程在我的应用中实现 CallKit:

I have followed the following tutorial to implement CallKit within my app:

https://www.raywenderlich.com/150015/callkit-tutorial-ios

但我想更进一步，并在调用处于活动状态时显示我自己的 ViewController.我正在做视频通话服务，所以我想拥有自己的界面.

But I would like to go further, and display my own ViewController while the call is active. I am doing a videocall service so I would like to have my own interface.

这可能吗?我一直在尝试从方法 provider(CXProvider:CXAnswerCallAction) 启动 ViewController，该方法是用户接听电话时调用的方法，但似乎每次都崩溃.我试图用这个(Swift 3)实例化它:

Is that possible at all? I have been trying to launch the ViewController from the method provider(CXProvider:CXAnswerCallAction) which is the one called when the user answers the call, but it seems to crash every time. I am trying to instantiate it with this (Swift 3):

let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "VideoCallViewController") as! VideoCallViewController
UIApplication.shared.keyWindow?.rootViewController?.present(vc, animated: true, completion: nil)

它在没有解释的情况下在第二行崩溃.它显示 lldb，我试图通过输入 bt 来获取回溯，但它没有返回任何内容.

It crashes on the second line without explanation. It shows lldb, I have tried to get the backtrace by entering bt but it doesn't return anything.

推荐答案

我想通了:

let mainStoryboard = UIStoryboard(name: "Main", bundle: nil)
let vc = mainStoryboard.instantiateViewController(withIdentifier: "VideoCallViewController") as! VideoCallViewController

那么，要么:

vc.view.frame = UIScreen.main.bounds
UIView.transition(with: self.window!, duration: 0.5, options: .transitionCrossDissolve, animations: {
    self.window!.rootViewController = vc
}, completion: nil)

或:

self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.rootViewController = vc
self.window?.makeKeyAndVisible()

根据 https://stackoverflow.com/a/35226874/5798668，第一个选项更可取，因为如果如果您使用第二个，您的应用程序中将同时有多个活动的 UIWindows.

According to https://stackoverflow.com/a/35226874/5798668, the first option is preferable because if you use the second one you will have multiple UIWindows active in your app at the same time.

注意:在我的例子中 ProviderDelegate 没有 self.window 属性，这是由 AppDelegate.swift 传递给它的，其中推送通知正在执行委托的 reportIncomingCall().

NOTE: In my case the ProviderDelegate did not have a self.window attribute, this was passed to it by the AppDelegate.swift, in which a Push notification was executing the reportIncomingCall() of the delegate.

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