ios - Sinch:如何在 Swift 中设置 SINCall 变量？

Question

我对如何正确创建 SINCall 对象有些困惑。我知道 SINCall 是一种类型协议(protocol)，我很快就尝试这样创建它:

var _call: SINCall?

当我尝试调用时，我的应用程序崩溃了，因为 _call 为 nil。

但是，如果我将 SINCall 添加到 SINCallDelegate 和 SINCallClientDelegate 旁边的协议(protocol)列表中，我会收到错误消息，指出我不符合 SINCall 协议(protocol)。

class CallViewController: UIViewController, SINCallDelegate, SINCallClientDelegate {

    var userName: String? {
        didSet {

        }
    }
    var recepientUser: String? {
        didSet {

        }
    }

    var _call: SINCall?

    var appKey = "xxx"
    var appSecret = "xxx"
    var host = "xxx"

    var client: SINClient {
        return Sinch.clientWithApplicationKey(appKey, applicationSecret: appSecret, environmentHost: host, userId: userName!)

}

override func viewDidLoad() {
    super.viewDidLoad()
    print("Lock and load")

    client.callClient().delegate = self
    client.setSupportCalling(true)
    client.start()
    client.startListeningOnActiveConnection()

    callUser()
}

func callUser() {
    self._call = client.callClient().callUserWithId(self.recepientUser!)
    self._call!.delegate = self
}

func client(client: SINCallClient!, didReceiveIncomingCall call: SINCall!) {
    call.delegate = self
    self._call = call
    self._call!.answer()
}

// callDidProgress, callDidEstablish, callDidEnd implemented below ...

Answer 1

调用时客户端是否启动，这可能需要几秒钟，所以您可能应该在启动时在应用程序委托(delegate)中启动客户端，然后当客户端启动时您可以进行调用，您可能现在得到 nil 因为客户端没有启动