我使用核心数据从服务器检索记录。当第一次启动时,成功地插入和检索记录.但是,停止运行应用程序,我在我的应用程序中检索故障记录。我做错什么了?
持久化集装箱:
static let sharedInstance = CoreDataStack()
private init() {}
// MARK: - Core Data stack
lazy var persistentContainer: NSPersistentContainer = {
let container = NSPersistentContainer(name: "BIDATA")
container.loadPersistentStores(completionHandler: { (storeDescription, error) in
if let error = error as NSError? {
fatalError("Unresolved error \(error), \(error.userInfo)")
}
})
return container
}()
lazy var context = persistentContainer.viewContext
// MARK: - Core Data Saving support
func save() {
// let context = persistentContainer.viewContext
if context.hasChanges {
do {
try context.save()
print("saved successfully")
} catch {
let nserror = error as NSError
fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
}
}
}
func fetch<T: NSManagedObject>(_ objectType: T.Type) -> [T]
{
let entityName = String(describing: objectType)
let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: entityName)
do{
let fetchObjects = try context.fetch(fetchRequest) as? [T]
return fetchObjects ?? [T]()
}catch
{
print(error)
return [T]()
}
}
}
func get_Report_from_Json(field_jsonObj : NSDictionary) -> Bool {
var returnBool = false
let context = CoreDataStack.sharedInstance.persistentContainer.viewContext
let reportID = helper.changeStringNumber(convertString:field_jsonObj.value(forKey: "ID")!)
let Status = helper.changeStringNumber(convertString: field_jsonObj.value(forKey: "Status")!)
let szDesc = field_jsonObj.value(forKey: "szDesc")
let OpenBy = field_jsonObj.value(forKey: "OpenBy")
let OpenByDateTime = field_jsonObj.value(forKey: "OpenByDateTime")
let ClosedBy = field_jsonObj.value(forKey: "ClosedBy")
let ClosedDateTime = field_jsonObj.value(forKey: "ClosedDateTime")
let AssignedBy = field_jsonObj.value(forKey: "AssignedBy")
let AssignedByDateTime = field_jsonObj.value(forKey: "AssignedByDateTime")
let AssignToUser = field_jsonObj.value(forKey: "AssignToUser")
let AssignToGroup = field_jsonObj.value(forKey: "AssignToGroup")
let VerifyBy = field_jsonObj.value(forKey: "VerifyBy")
let VeriftyByDateTime = field_jsonObj.value(forKey: "VeriftyByDateTime")
let PropertyID = helper.changeStringNumber(convertString: field_jsonObj.value(forKey: "PropertyID")!)
let EntityGroupID = helper.changeStringNumber(convertString: field_jsonObj.value(forKey: "EntityGroupID")!)
let EntityTypeID = helper.changeStringNumber(convertString: field_jsonObj.value(forKey: "EntityTypeID")!)
let EntityID = helper.changeStringNumber(convertString: field_jsonObj.value(forKey: "EntityID")!)
let EntityDescGroup = field_jsonObj.value(forKey: "EntityDescGroup")
let AreaID = helper.changeStringNumber(convertString: field_jsonObj.value(forKey: "AreaID")!)
let LocationID = helper.changeStringNumber(convertString: field_jsonObj.value(forKey: "LocationID")!)
let LocationDescGroup = field_jsonObj.value(forKey: "LocationDescGroup")
let ReportType = field_jsonObj.value(forKey: "ReportType")
let UTCOpenDateTime = field_jsonObj.value(forKey: "UTCOpenDateTime")
let UTCAssignDateTime = field_jsonObj.value(forKey: "UTCAssignDateTime")
let UTCVerifyDateTime = field_jsonObj.value(forKey: "UTCVerifyDateTime")
let UTCClosedDateTime = field_jsonObj.value(forKey: "UTCClosedDateTime")
let LastUpdateDatetime = field_jsonObj.value(forKey: "LastUpdateDatetime")
let AssignDesc = field_jsonObj.value(forKey: "AssignDesc")
let ClosedDesc = field_jsonObj.value(forKey: "ClosedDesc")
let TypeO = field_jsonObj.value(forKey: "TypeO") is NSNull ? "" : field_jsonObj.value(forKey: "TypeO")
let PathO = field_jsonObj.value(forKey: "PathO")is NSNull ? "" : field_jsonObj.value(forKey: "PathO")
let TypeA = field_jsonObj.value(forKey: "TypeA")is NSNull ? "" : field_jsonObj.value(forKey: "TypeA")
let PathA = field_jsonObj.value(forKey: "PathA")is NSNull ? "" : field_jsonObj.value(forKey: "PathA")
let TypeC = field_jsonObj.value(forKey: "TypeC")is NSNull ? "" : field_jsonObj.value(forKey: "TypeC")
let PathC = field_jsonObj.value(forKey: "PathC")is NSNull ? "" : field_jsonObj.value(forKey: "PathC")
let ReportBy = "server"
let photoEntity = Report(context: persistenceManager.context)
photoEntity.r_ID = reportID
photoEntity.propertyID = PropertyID
photoEntity.szDesc = szDesc as? String
photoEntity.status = "1"
photoEntity.openBy = OpenBy as? String
photoEntity.openByDateTime = OpenByDateTime as? String
photoEntity.closedBy = ClosedBy as? String
photoEntity.closedDateTime = ClosedDateTime as? String
photoEntity.assignedBy = AssignedBy as? String
photoEntity.assignedByDateTime = AssignedByDateTime as? String
photoEntity.assignToUser = AssignToUser as? String
photoEntity.assignToGroup = AssignToGroup as? String
photoEntity.verifyBy = VerifyBy as? String
photoEntity.veriftyByDateTime = VeriftyByDateTime as? String
photoEntity.entityGroupID = EntityGroupID
photoEntity.entityTypeID = EntityTypeID
photoEntity.entityID = EntityID
photoEntity.entityDescGroup = EntityDescGroup as? String
photoEntity.areaid = AreaID
photoEntity.locationID = LocationID
photoEntity.locationDescGroup = LocationDescGroup as? String
photoEntity.reportType = ReportType as? String
photoEntity.utcOpenDateTime = UTCOpenDateTime as? String
photoEntity.utcAssignDateTime = UTCAssignDateTime as? String
photoEntity.utcVerifyDateTime = UTCVerifyDateTime as? String
photoEntity.utcClosedDateTime = UTCClosedDateTime as? String
photoEntity.lastUpdateDatetime = LastUpdateDatetime as? String
photoEntity.assignDesc = AssignDesc as? String
photoEntity.closedDesc = ClosedDesc as? String
photoEntity.typeO = TypeO as? String
photoEntity.pathO = PathO as? String
photoEntity.typeA = TypeA as? String
photoEntity.pathA = PathA as? String
photoEntity.typeC = TypeC as? String
photoEntity.pathC = PathC as? String
photoEntity.reportBy = ReportBy
persistenceManager.save()
return true
}
func get_Report_from_database() -> [Report]?{
let reportList = persistenceManager.fetch(Report.self)
return reportList
}
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