Question

我们的最新版本导致1％的用户基础崩溃。我完全坚持使用它，因为它不能在我们的暂存环境中复制。

Firebase Crashlytics抛出此错误：

Crashed: NSOperationQueue 0x282d76da0 (QOS: UNSPECIFIED)
0  MyApp                         0x102d38c40 String.toExpiryDate() + 339 (Extensions.swift:339)
1  MyApp                         0x102d3f628 closure #1 in ApiService.unlockVariablePass(credit:complete:) + 235 (ApiService.swift:235)
2  MyApp                         0x102d34324 partial apply for closure #1 in HttpClient.post(url:token:username:password:body:callback:) + 53 (HttpClientService.swift:53)
3  MyApp                         0x102d693e0 partial apply for closure #1 in NSURLSession.dataTask(with:completionHandler:) + 20 (URLSessionProtocol.swift:20)
4  MyApp                         0x102d69210 thunk for @escaping @callee_guaranteed (@guaranteed Data?, @guaranteed NSURLResponse?, @guaranteed Error?) -> () (<compiler-generated>)
5  CFNetwork                      0x1936f1688 __75-[__NSURLSessionLocal taskForClass:request:uploadFile:bodyData:completion:]_block_invoke + 32
6  CFNetwork                      0x193705220 __49-[__NSCFLocalSessionTask _task_onqueue_didFinish]_block_invoke + 176
7  Foundation                     0x193b81ef8 __NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK__ + 16
8  Foundation                     0x193a8e3e0 -[NSBlockOperation main] + 72
9  Foundation                     0x193a8d8c8 -[__NSOperationInternal _start:] + 740
10 Foundation                     0x193b83c7c __NSOQSchedule_f + 272

我已经检查了服务器，并且日志证明始终以正确的格式提供expiry_date。它从来没有为空。

{"expiry_date": "2019-07-05 20:00:36"}

客户端代码：

try? self.httpClient.post(url: url, token: ServerUrlFabric.shared.getTokenForAPI(), username: kc_username, password: kc_password, body: creditDict) { (data, response, error) in
            if let error = error {
                log(error.localizedDescription)
                complete(false, nil, ServiceError.invalidSession)
            } else if let httpResponse = response as? HTTPURLResponse {
                switch (httpResponse.statusCode) {
                case 201:
                    let json = try! JSONSerialization.jsonObject(with: data!, options: []) as! Dictionary<String, Any>
                    let expiryDate = (json["expiry_date"] as! String).toExpiryDate()
                    complete(true, expiryDate, nil)

扩展名：

extension String {
    func toExpiryDate() -> Date {
        let formatter = DateFormatter()
        formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        formatter.timeZone = TimeZone(abbreviation: "UTC")
        return formatter.date(from: self)!
    }
}

请问我错过了什么？

从字符串到日期的转换有时会引发NSOperationQueue错误

0 个答案: