如何使用Alamofire監(jiān)聽(tīng)網(wǎng)絡(luò)連接狀態(tài)的變化

Alamofire本身并不支持直接監(jiān)聽(tīng)網(wǎng)絡(luò)連接狀態(tài)的變化。但可以使用Reachability庫(kù)來(lái)實(shí)現(xiàn)這個(gè)功能。

首先，需要在項(xiàng)目中集成Reachability庫(kù)?？梢酝ㄟ^(guò)CocoaPods添加依賴：

pod 'ReachabilitySwift'

然后在需要監(jiān)聽(tīng)網(wǎng)絡(luò)連接狀態(tài)變化的地方，使用Reachability庫(kù)監(jiān)聽(tīng)網(wǎng)絡(luò)狀態(tài)的變化。例如，在AppDelegate中監(jiān)聽(tīng)網(wǎng)絡(luò)狀態(tài)的變化：

import Reachability

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?
    let reachability = try! Reachability()

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        NotificationCenter.default.addObserver(self, selector: #selector(reachabilityChanged), name: .reachabilityChanged, object: reachability)
        try? reachability.startNotifier()
        return true
    }

    @objc func reachabilityChanged(notification: Notification) {
        let reachability = notification.object as! Reachability
        if reachability.connection != .unavailable {
            print("Network is available.")
        } else {
            print("Network is not available.")
        }
    }
}

在上面的例子中，監(jiān)聽(tīng)了網(wǎng)絡(luò)連接狀態(tài)的變化，并在控制臺(tái)輸出網(wǎng)絡(luò)狀態(tài)的變化信息。在需要的地方也可以根據(jù)網(wǎng)絡(luò)狀態(tài)的變化來(lái)執(zhí)行相應(yīng)的操作。