Ios 从NWConnection获取ip地址的正确方法是什么

我正在使用NWListener

newConnectionHandler

handler获得如下新连接：

listener.newConnectionHandler = { [weak self] newConnection in
    guard let self = self else { return }

    newConnection.stateUpdateHandler = { [weak self] newState in
        guard let self = self else { return }
        ...
        ...
        print("Connection endpoint: \(newConnection.endpoint)")
    }

    newConnection.start(queue: self.queue)
}

var ipAddressWithPort = newConnection.endpoint.debugDescription
if let portRange = ipAddressWithPort.range(of: ":") {
    ipAddressWithPort.removeSubrange(portRange.lowerBound..<ipAddressWithPort.endIndex)
}

这是印刷品：

10.0.1.2:62610

我需要只获取ip地址，以便以后保存，但我无法在

NWEndpoint

中找到任何属性来获取它。我可以这样做：

listener.newConnectionHandler = { [weak self] newConnection in
    guard let self = self else { return }

    newConnection.stateUpdateHandler = { [weak self] newState in
        guard let self = self else { return }
        ...
        ...
        print("Connection endpoint: \(newConnection.endpoint)")
    }

    newConnection.start(queue: self.queue)
}

var ipAddressWithPort = newConnection.endpoint.debugDescription
if let portRange = ipAddressWithPort.range(of: ":") {
    ipAddressWithPort.removeSubrange(portRange.lowerBound..<ipAddressWithPort.endIndex)
}

var ipAddressWithPort=newConnection.endpoint.debugDescription
如果let portRange=ipAddressWithPort.range（of:“”）{
ipAddressWithPort.removeSubrange（portRange.lowerBound..
NWEndpoint
是不同类型端点的枚举（带有关联值）。接受TCP连接的远程主机将是由主机和端口定义的端点，您可以使用switch语句提取这些值

如果您只需要主机部件的字符串表示，而不需要端口，那么

switch(connection.endpoint) {
    case .hostPort(let host, _):
        let remoteHost = "\(host)"
        print(remoteHost) // 10.0.1.2
    default:
        break
}