在後臺模式下打開FMDB時崩潰

我在iOS上啓動了我的Cordova應用程序，從一個重要的位置更改開始，有時以這種方式啓動時，它在打開數據庫時崩潰。我不確定是什麼情況導致這種情況 - 我自己無法再現，我剛剛收到關於Crashlytics的報告;它看起來像隻影響一些設備。在後臺模式下打開FMDB時崩潰

這裏是我的代碼：

class Database { 
    static let DB_DIR:URL = { 
     // Library/LocalDatabase doesn't get backed up to iTunes/iCloud, and it matches our sqlite plugin's default (for Javascript access) 
     let fileMgr = FileManager.default 
     let libUrl:URL = try! fileMgr.url(for: .libraryDirectory, in: .userDomainMask, appropriateFor: nil, create: false) 
     return libUrl.appendingPathComponent("LocalDatabase") 
    }() 

    static func getPath(_ dbName:String!) -> String { 
     return DB_DIR.appendingPathComponent(dbName).path 
    } 

    static func createDb(_ dbName:String!) -> FMDatabase { 
     return FMDatabase(path: getPath(dbName)) 
    } 

    // only for front- and back-end dbs (TODO - close these when app exits, or open/close for each transaction?) 
    static func getOpenedDb(_ dbName:String) -> FMDatabase { 
     let db:FMDatabase = createDb(dbName) 
     if !db.open() { 
      fatalError("Unable to open \(dbName)") 
     } 
     return db 
    } 

    static let BACKEND_DB:FMDatabase = Database.getOpenedDb("mainIosDb") 
    static let FRONTEND_DB:FMDatabase = Database.getOpenedDb("JsDb")  
}

...這是一個崩潰日誌：

Crashed: com.rsginc.rmove.TripStorage.singleton 
0 libswiftCore.dylib    0x1008c8a18 _TFs16_assertionFailedFTVs12StaticStringSSS_Su5flagsVs6UInt32_Os5Never + 164 
1 rMove       0x10022dc88 type metadata accessor for Database (Utilities.swift) 
2 rMove       0x10022d320 globalinit_33_2CFFAAA7EF6073F07DB88164E80B793B_func11 (Utilities.swift:177) 
3 libdispatch.dylib    0x188c6e1bc _dispatch_client_callout + 16 
4 libdispatch.dylib    0x188c6efb0 dispatch_once_f + 56 
5 rMove       0x10022d35c Database.BACKEND_DB.unsafeMutableAddressor (Utilities.swift) 
6 rMove       0x100213864 TripStorage.init() -> TripStorage (TripStorage.swift:13) 
7 rMove       0x100213508 static TripStorage.(getInstance() -> TripStorage).(closure #1) (TripStorage.swift:87) 
8 libdispatch.dylib    0x188c6e1bc _dispatch_client_callout + 16 
9 libdispatch.dylib    0x188c7b7f0 _dispatch_barrier_sync_f_invoke + 84 
10 rMove       0x100213418 static TripStorage.getInstance() -> TripStorage (TripStorage.swift) 
11 rMove       0x10020384c specialized CordovaInterface.start(Double, Double, Int, Double, Double, String, Bool, Int, Int, Double, Int, Int, Int, Int) ->() (CordovaInterface.swift) 
12 rMove       0x1001fea74 CordovaInterface.configureFromDefaults() ->() (CordovaInterface.swift) 
13 rMove       0x1002014fc partial apply (CordovaInterface.swift) 
14 rMove       0x10020b1e0 specialized TerminationRecovery.applicationLaunched(notification : NSNotification) ->() (TerminationRecovery.swift) 
15 rMove       0x10020a020 @objc TerminationRecovery.applicationLaunched(notification : NSNotification) ->() (TerminationRecovery.swift) 
16 CoreFoundation     0x189d7eb10 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20 
17 CoreFoundation     0x189d7e214 _CFXRegistrationPost + 400 
18 CoreFoundation     0x189d7df90 ___CFXNotificationPost_block_invoke + 60 
19 CoreFoundation     0x189dedb8c -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1504 
20 CoreFoundation     0x189cbfe64 _CFXNotificationPost + 376 
21 Foundation      0x18a7f4e0c -[NSNotificationCenter postNotificationName:object:userInfo:] + 68 
22 UIKit       0x18ff1cd38 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4196 
23 UIKit       0x18ff22808 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1656 
24 UIKit       0x18ff37104 __84-[UIApplication _handleApplicationActivationWithScene:transitionContext:completion:]_block_invoke.3139 + 48 
25 UIKit       0x18ff1f7ec -[UIApplication workspaceDidEndTransaction:] + 168 
26 FrontBoardServices    0x18b9bb92c __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 36 
27 FrontBoardServices    0x18b9bb798 -[FBSSerialQueue _performNext] + 176 
28 FrontBoardServices    0x18b9bbb40 -[FBSSerialQueue _performNextFromRunLoopSource] + 56 
29 CoreFoundation     0x189d92b5c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24 
30 CoreFoundation     0x189d924a4 __CFRunLoopDoSources0 + 524 
31 CoreFoundation     0x189d900a4 __CFRunLoopRun + 804 
32 CoreFoundation     0x189cbe2b8 CFRunLoopRunSpecific + 444 
33 UIKit       0x18fd057b0 -[UIApplication _run] + 608 
34 UIKit       0x18fd00534 UIApplicationMain + 208 
35 rMove       0x100103b00 main (main.m:32) 
36 libdispatch.dylib    0x188ca15b8 (Missing)

此行的堆棧跟蹤：

2 rMove 0x10022d320 globalinit_33_2CFFAAA7EF6073F07DB88164E80B793B_func11 (Utilities.swift:177)

相當於本行代碼：

static let BACKEND_DB:FMDatabase = Database.getOpenedDb("mainIosDb")

我的猜測和希望的是，有在堆棧跟蹤一些偉大的信息直接在此問題的原因分，我只是不知道如何解釋它。

來源

2017-01-11 Crag

通過「大信息」我希望這意味着某人做某事：我使用FMDB _TFs16_assertionFailedFTVs12StaticStringSSS_Su5flagsVs6UInt32_Os5Never – Crag

你必須打開數據庫標誌，嘗試belloe代碼工作對我來說

[self.database openWithFlags:SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_FILEPROTECTION_NONE];

來源

2017-01-17 06:54:02

，和我想我的斷言失敗可能來自sqlite3_threadsafe在初始化過程中，然後我嘗試打開數據庫... – Crag

在後臺模式下打開FMDB時崩潰

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