Question

我收到了神秘的崩溃报告，而对于我的生活，我无法弄清楚可能导致此错误的原因。但是，我不是一个熟练的iOS / Swift开发人员，所以对其他人来说可能很明显！

这是堆栈：

function signature specialization <Arg[1] = Value Promoted from Box> of closure #1 () -> () in Company.LoginViewController.(logIn in _10D245F74F8D2701C8F7339313EB1733)() -> ()
LoginViewController.swift - line 275
SIGABRT

libsystem_kernel.dylib
__pthread_kill
libsystem_c.dylib
abort
libswiftCore.dylib
0x103964000 + 2666636
libswiftCore.dylib
0x103964000 + 2666896
libswiftCore.dylib
0x103964000 + 2869624
Company
function signature specialization <Arg[1] = Value Promoted from Box> of closure #1 () -> () in Company.LoginViewController.(logIn in _10D245F74F8D2701C8F7339313EB1733)() -> () LoginViewController.swift:275
Company
_T0Ieg_IeyB_TR LoginViewController.swift:0
Company
_T0So8NSStringCIeyBy_SSIegx_TRTA AuthenticationManager.swift:0
Company
function signature specialization <Arg[0] = Owned To Guaranteed> of closure #1 (__ObjC.AFOAuthCredential) -> () in Company.AuthenticationManager.authenticate(with: Swift.String, password: Swift.String, success: (Swift.String) -> (), failure: (__ObjC.INTAuthenticationError) -> ()) -> () AuthenticationManager.swift:105

以下是相关功能：

private func logIn() {
    beginAuthentication()

    let credentials = INTUserCredentials()
    credentials.username = email.text
    credentials.password = password.text

    authenticationModel.logIn(with: credentials, success: { [unowned self] in
// *** Crashes here, oddly on an empty line ***
        let finish = { [weak self] in
            self?.endAuthentication()
            if let delegate = self?.delegate {
                delegate.authenticationViewControllerDidLogin(self?.registrationInfoContainer)
            }
        }
    }, failure: { [weak self] errorMessage in
        self?.showErrorMessage(errorMessage)
    })
}

Answer 1

您引用为self（LoginViewController？）的对象是否可能被丢弃？我可以想象，您的authenticationModel-class的函数logIn的签名需要非可选属性。但是，在调用logIn（）函数之后，对象不再被使用并被释放（因为[unowned self]）...只需在dealloc函数中放置一个断点，看看会发生什么。顺便说一句，dealloc函数不应为空以使断点停止

Swift崩溃报告`功能签名专业化`

1 个答案: