关于ios：使用Callkit接受呼叫后如何保持本机UI

How to keep native UI after accept a call using Callkit

我正在使用Callkit和Linphone开发iOS voip应用程序。当我收到来电时，系统会显示本机电话用户界面，以供用户接受或拒绝呼叫，而当用户点击接受按钮时，呼叫将开始，但电话用户界面将消失。

在用户接受呼叫后，如whatsapp一样，如何保持本机电话UI？

此外，我如何在打出电话时显示本机电话UI？

这是我的提供者代表代码：

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func reportIncomingCall(uuid: UUID, handle: String, hasVideo: Bool = false, completion: ((NSError?) -> Void)? = nil) {
// Construct a CXCallUpdate describing the incoming call, including the caller.
let update = CXCallUpdate()
update.remoteHandle = CXHandle(type: .generic, value: handle)
update.hasVideo = hasVideo

// Report the incoming call to the system
provider.reportNewIncomingCall(with: uuid, update: update) { error in
/*
Only add incoming call to the app's list of calls if the call was allowed (i.e. there was no error)
since calls may be"denied" for various legitimate reasons. See CXErrorCodeIncomingCallError.
*/
if error == nil {
print("calling")

}
}
}

func provider(_ provider: CXProvider, perform action: CXStartCallAction) {
let update = CXCallUpdate()
update.remoteHandle = action.handle

provider.reportOutgoingCall(with: action.uuid, startedConnectingAt: Date())
NotificationCenter.default.post(name: NSNotification.Name(rawValue:"callStart"), object: self, userInfo: ["uuid":action.uuid])
action.fulfill(withDateStarted: Date())

}

func provider(_ provider: CXProvider, perform action: CXAnswerCallAction) {
NotificationCenter.default.post(name: NSNotification.Name(rawValue:"callStart"), object: self, userInfo: ["uuid":action.uuid])

// ACCEPT CALL ON SIP MANAGER
if let voiceCallManager = AppDelegate.voiceCallManager {
voiceCallManager.acceptCall()
}

action.fulfill(withDateConnected: Date())

}