Question

我正在使用Alamofire NetworkReachabilityManager来管理我的连接，如下所示。

    let reachabilityManager = NetworkReachabilityManager()
   reachabilityManager?.listener = { [weak self] status in
            switch status {
            case .notReachable:
                self?.connectionType = .notReachable
                break
            case .unknown:
                self?.connectionType = .notReachable
                break
            case .reachable(.ethernetOrWiFi):
                self?.connectionType = .wifi
                break
            case .reachable(.wwan):
                self?.connectionType = .cellular

                break
            }

public enum ReachabilityStatus {
    case unknown
    case notReachable
    case wifi
    case cellular
}

当我启动应用程序本身时，我收到此回调但我不希望这个回调只有在网络连接发生变化时才需要回调。

我该如何解决这个问题？

Answer 1

如何创建变量来存储先前的状态，并在第一次调用时检查变量是否为nil。之后，您可以随时检查状态是否已更改。

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Answer 2

您可以在延迟一段时间后添加监听器。因此，当应用程序启动时实例化NetworkReachabilityManager时，侦听器应为nil

    let reachabilityManager = NetworkReachabilityManager()
    var previousStatus: ReachabilityStatus? = nil

    DispatchQueue.main.asyncAfter(deadline: .now() + 10.0, execute: {
    reachabilityManager?.listener = { [weak self] status in

    if let p = self.previousStatus, p == status {
        return // status hasn't changed
    } else {
        // status is nil
        self.previousStatus = status
        return 
    }

    switch status {
    case .notReachable:
        self?.connectionType = .notReachable
        break
    case .unknown:
        self?.connectionType = .notReachable
        break
    case .reachable(.ethernetOrWiFi):
        self?.connectionType = .wifi
        break
    case .reachable(.wwan):
        self?.connectionType = .cellular

        break
 }
})

编辑：我已经测试了这段代码。它有效。

网络连接只有在更改时才会出现

2 个答案: