Question

是否可以通过按下硬件按钮在我们的应用程序上获取任何事件。

赞：音量按钮/主页按钮。

Answer 1

希望对您有帮助！

当用户按下主页按钮时，您将通过appDelegates方法来了解。

func applicationWillResignActive(_ application: UIApplication) {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
}

func applicationDidEnterBackground(_ application: UIApplication) {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

func applicationWillEnterForeground(_ application: UIApplication) {
    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}

func applicationDidBecomeActive(_ application: UIApplication) {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

func applicationWillTerminate(_ application: UIApplication) {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

当用户按下音量按钮时，要检测它。

func listenVolumeButton(){

    let audioSession = AVAudioSession.sharedInstance()
    audioSession.setActive(true, error: nil)
    audioSession.addObserver(self, forKeyPath: "outputVolume",
        options: NSKeyValueObservingOptions.New, context: nil)
}

override func observeValueForKeyPath(keyPath: String, ofObject object: AnyObject,
    change: [NSObject : AnyObject], context: UnsafeMutablePointer<Void>) {
    if keyPath == "outputVolume"{
        print("got in here")
    }
}

Answer 2

您可以观察outputVolume属性来检测音量按钮的动作，

func volumeAction() {
    let audioSession = AVAudioSession.sharedInstance()
    do {
        try audioSession.setActive(true, options: [])
        audioSession.addObserver(self, forKeyPath: "outputVolume",
                                 options: .new, context: nil)
    } catch {
        print("Error")
    }
}

override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
    if keyPath == "outputVolume"{
        print("volume changed")
    }
}

由于“主页”按钮在较新的设备中不再可用，因此您可以使用生物识别身份验证（面部识别或触摸识别）。

通过硬件按钮获取事件的任何可能性。

2 个答案: