iOS应用程序商店应用程序在登录过程中崩溃（未开发）

Question

这可能是因为UserDefaults在一段时间后会被重置，也可能是因为我经常更新操作系统，但一段时间后我的iOS应用程序的发布版本会在我的登录屏幕上崩溃，很可能是在那里我检查保存的凭据（在UserDefaults中）。重新安装应用程序可以解决这个问题。控制台返回大量：

不支持在主线程外使用UIKit视图自定义API。-SetAlignStoKeyboard：发送到<_UIAlertControllerView:0x125B2D070；帧=(0 0；414 896）；层= >

并且我的系统日志显示此线程上存在错误：

异常类型:EXC_CRASH(SIGABRT)异常代码:0x00000000000000000000000000000000000000000000异常注意:EXC_CORPSE_NOTIFY由线程触发：4

应用程序特定信息：已调用abort（）

线程4名称：调度队列：com.apple.nsurlsession-委派线程4崩溃：0 libsystem_kernel.dylib 0x00000001bfb4e414 0x1bfb26000+164884 1 libsystem_pthread.dylib 0x00000001dd6a8b50 0x1dd6a6000+11088 2 libsystem_c.dylib 0x000000019b027b74 0x19afb1000+486260 3 libc++abi.dylib 0x00000001a6d1acf8 0x1a6d07000+81144 4 libc++abi.dylib 0x00000001a6d0be4c

下面是我用来检查保存的凭据的一些代码。在后端API中，我看不到任何登录尝试。如果有帮助的话，我可以在它崩溃之前看到这个viewcontroller。不确定这是否排除了ViewDidLoad。

override func viewDidLoad() {
    super.viewDidLoad()
    addLoadingSpinner()
    bLogIn.titleLabel?.font = UIFont.setToVoiceLight()
    self.tfCustomerID.delegate = self
    self.tfUsername.delegate = self
    self.tfPassword.delegate = self
    tfUsername.keyboardType = .default
    tfPassword.textContentType = .password
    setupUI()
    if UserDefaults.standard.string(forKey: UserDefaultsKeys.session) != nil
        && UserDefaults.standard.string(forKey: UserDefaultsKeys.savedCred) == "True" {
        login_session = UserDefaults.standard.string(forKey: UserDefaultsKeys.session)!
        check_session()
    }
    else if UserDefaults.standard.string(forKey: UserDefaultsKeys.savedCred) == "True" &&
            UserDefaults.standard.string(forKey: UserDefaultsKeys.usesBiometrics) == "True" {
        promptTouchOrFaceID()
    }
    removeLoadingSpinner()
}

override func viewWillAppear(_ animated: Bool) {
    AppDelegate.AppUtility.lockOrientation(UIInterfaceOrientationMask.portrait, andRotateTo:
                                            UIInterfaceOrientation.portrait)
    cbSave.isChecked = UserDefaults.standard.string(forKey: UserDefaultsKeys.savedCred) == "True"
    addObservers()
}

func check_session() {
    UserDefaults.standard.set(login_session, forKey: "session")
    UserInfo.access_token = UserDefaults.standard.string(forKey: "session")!

    var request = URLRequest(url: NSURL(string: checksession_url)! as URL)
    request.httpMethod = .GET
    request.addValues(...)
    let task = URLSession.shared.dataTask(with: request) { data, response, error in
        if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode == 200 {
            //VERIFIED THAT NEVER GETTING TO API
            DispatchQueue.main.async {
                ...
            }
        } else {
            self.promptTouchOrFaceID()
            UserDefaults.standard.set(nil, forKey: UserDefaultsKeys.session)
        }
    }
    task.resume()
}

下面是我的生物识别提示代码：

func promptTouchOrFaceID() {
    //create context for touch auth
    let authenticationContext = LAContext()
    var error: NSError?
    authenticationContext.localizedFallbackTitle = ""
    let biometricType = authenticationContext.biometricType
    //check if the device has a fingerprint sensor, exit if not
    guard authenticationContext.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics,
                                                  error: &error) else {
        let title = "Error"
        var message = ""
        switch biometricType {
        case .faceID:
            message = "This device does not have a FaceID sensor or the sensor is not enabled."
        case .touchID:
            message = "This device does not have a TouchID sensor or the sensor is not enabled."
        case .none:
            message = "This device does not have any sensors to use TouchID or FaceID"
        }

        AlertService.showAlert(on: self, title: title, message: message)
        UserDefaults.standard.set("False", forKey: UserDefaultsKeys.usesBiometrics)
        removeLoadingSpinner()
        return
    }
    authenticationContext.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics,
                                         localizedReason: "Please use your fingerprint to authenticate.",
                                         reply: { [unowned self] (success, error) -> Void in
                                            if (success) {
                                                //fingerprint recognized, set this possible and go to view controller
                                                OperationQueue.main.addOperation({ () -> Void in
                                                    self.fillInUserDetails()
                                                    self.login_now(
                                                        username:self.tfUsername.text!,
                                                        password: self.userDefaults.string(forKey: UserDefaultsKeys.password)!,
                                                        customer: self.tfCustomerID.text!)
                                                })
                                            }
                                         })

     }

Answer 1

只是一个疯狂的镜头，但是在您的plist文件中是否有nsfaceidusagedescription键。我记得几个月前有过这样的问题。