核心数据轻量级迁移SWIFT 3不工作

Question

我正在期运用persistentContainer

lazy var persistentContainer: NSPersistentContainer = { 
     /* 
     The persistent container for the application. This implementation 
     creates and returns a container, having loaded the store for the 
     application to it. This property is optional since there are legitimate 
     error conditions that could cause the creation of the store to fail. 
     */ 
    // let container = NSPersistentContainer(name:"YiuPai") 


     let container = NSPersistentContainer(name:"YiuPai") 

     let storeUrl = self.applicationDocumentsDirectory.appendingPathComponent("YiuPai.sqlite") 

     print(storeUrl) 


     let description = NSPersistentStoreDescription(url: storeUrl) 

     description.shouldInferMappingModelAutomatically = true 
     description.shouldMigrateStoreAutomatically = true 

     container.persistentStoreDescriptions = [NSPersistentStoreDescription(url: storeUrl)] 


     container.loadPersistentStores(completionHandler: { (storeDescription, error) in 
      if let error = error as NSError? { 
       // Replace this implementation with code to handle the error appropriately. 
       // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. 

       /* 
       Typical reasons for an error here include: 
       * The parent directory does not exist, cannot be created, or disallows writing. 
       * The persistent store is not accessible, due to permissions or data protection when the device is locked. 
       * The device is out of space. 
       * The store could not be migrated to the current model version. 
       Check the error message to determine what the actual problem was. 
       */ 
       fatalError("Unresolved error \(error), \(error.userInfo)") 
      } 
     }) 
     return container 
    }() 

错误我正在歌厅

2017-08-24 16:37:43.912800+0530 YiuPai[1688:496051] [error] error: -addPersistentStoreWithType:SQLite configuration:(null) URL:file:///var/mobile/Containers/Data/Application/81EC85D8-5C35-4090-8F2E-5229775F2D43/Documents/YiuPai.sqlite options:{ 
    NSInferMappingModelAutomaticallyOption = 1; 
    NSMigratePersistentStoresAutomaticallyOption = 1; 
} ... returned error Error Domain=NSCocoaErrorDomain Code=134110 "An error occurred during persistent store migration." UserInfo={sourceURL=file:///var/mobile/Containers/Data/Application/81EC85D8-5C35-4090-8F2E-5229775F2D43/Documents/YiuPai.sqlite, reason=Can't copy source store to destination store path, destinationURL=file:///var/mobile/Containers/Data/Application/81EC85D8-5C35-4090-8F2E-5229775F2D43/Documents/.YiuPai.sqlite.migrationdestination_41b5a6b5c6e848c462a8480cd24caef3, NSUnderlyingError=0x170851460 {Error Domain=NSSQLiteErrorDomain Code=5 "(null)" UserInfo={NSFilePath=/var/mobile/Containers/Data/Application/81EC85D8-5C35-4090-8F2E-5229775F2D43/Documents/.YiuPai.sqlite.migrationdestination_41b5a6b5c6e848c462a8480cd24caef3, Source database Path=/var/mobile/Containers/Data/Application/81EC85D8-5C35-4090-8F2E-5229775F2D43/Documents/YiuPai.sqlite, reason=Failed to replace destination database}}} with userInfo dictionary { 
    NSUnderlyingError = "Error Domain=NSSQLiteErrorDomain Code=5 \"(null)\" UserInfo={NSFilePath=/var/mobile/Containers/Data/Application/81EC85D8-5C35-4090-8F2E-5229775F2D43/Documents/.YiuPai.sqlite.migrationdestination_41b5a6b5c6e848c462a8480cd24caef3, Source database Path=/var/mobile/Containers/Data/Application/81EC85D8-5C35-4090-8F2E-5229775F2D43/Documents/YiuPai.sqlite, reason=Failed to replace destination database}"; 
    destinationURL = "file:///var/mobile/Containers/Data/Application/81EC85D8-5C35-4090-8F2E-5229775F2D43/Documents/.YiuPai.sqlite.migrationdestination_41b5a6b5c6e848c462a8480cd24caef3"; 
    reason = "Can't copy source store to destination store path"; 
    sourceURL = "file:///var/mobile/Containers/Data/Application/81EC85D8-5C35-4090-8F2E-5229775F2D43/Documents/YiuPai.sqlite"; 
} 

我怎样才能解决这个问题？

Answer 1

我想我有你的错误。试试像这样设置你的storeUrl：

let storeUrl = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).first!.appendingPathComponent("YiuPai.sqlite")