我有类似的方法：
transformDexWithInstantRunSlicesApkForAwsDebug
达到这一点时，我的应用程序崩溃了：
如果让DeletedObjectIDs = batchDeleteResult.result设为？ [NSManagedObjectID] { NSManagedObjectContext.mergeChanges（fromRemoteContextSave：[NSDeletedObjectsKey：DeletedObjectIDs]，放入：[Context]） }
我在数组中拥有的ID如下：
deleteSectorIds的打印说明： ▿24个元素 -0：“ 8” -1：“ 9” -2：“ 11” -3：“ 12” -4：“ 13” -5：“ 14” -6：“ 15” -7：“ 16” -8：“ 17” -9：“ 18” -10：“ 19” -11：“ 20” -12：“ 21” -13：“ 22” -14：“ 23” -15：“ 24” -16：“ 25” -17：“ 27” -18：“ 28” -19：“ 29” -20：“ 30” -21：“ 31” -22：“ 32” -23：“ 33”
而且我似乎无法弄清楚为什么会出现此错误：
由于未捕获的异常“ NSInvalidArgumentException”而终止应用程序，原因：“在实体中找不到关键路径ID”
当我在数组中显然没有ID值为7的时候？
任何人都可以为我分解到底是怎么回事？
我的模型如下：
导入基金会 导入ObjectMapper
枚举SectorsModelEnum：字符串{
func syncSectors(sectors: [SectorsModel]){
BackgroundContext.performAndWait {
//Fetch results from the database
let matchingSectorRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "Sectors")
//Delete Sector ids
let deleteSectorIds = sectors.map { $0.ID }.compactMap { $0 }
matchingSectorRequest.predicate = NSPredicate(format: " !(ANY sector_id IN %@) AND (sector_id != nil)", argumentArray: [deleteSectorIds])
let batchDeleteRequest = NSBatchDeleteRequest.init(fetchRequest: matchingSectorRequest)
batchDeleteRequest.resultType = .resultTypeObjectIDs
// Execute the request to do batch delete and merge the changes to viewContext, which triggers the UI update
do {
let batchDeleteResult: NSBatchDeleteResult = try BackgroundContext.execute(batchDeleteRequest) as! NSBatchDeleteResult
if let deletedObjectIDs = batchDeleteResult.result as? [NSManagedObjectID] {
NSManagedObjectContext.mergeChanges(fromRemoteContextSave: [NSDeletedObjectsKey: deletedObjectIDs], into: [Context])
}
} catch {
print("Error: \(error)\nCould not batch delete existing records.")
return
}
//******************** End of Delete Sectors *****************************
// Insert new SubSectors
for sector in sectors where !sector.exists {
_ = saveSectors(sectors: sectors)
}
do {
// Save all changes on background context
try BackgroundContext.save()
Context.performAndWait {
do {
// Saves the data from the background to the main context
try Context.save()
} catch {
print("Failure to save context: \(error)")
}
}
} catch {
print("Error: \(error)\nCould not save new records.")
BackgroundContext.rollback()
return
}
//******************** End of Insert new Sectors *****************************
//Update Sectors
for sector in sectors where !sector.ID.isNilOrEmpty{
let batchUpdateRequest = NSBatchUpdateRequest.init(entityName: "Sectors")
batchUpdateRequest.resultType = .updatedObjectIDsResultType
batchUpdateRequest.predicate = NSPredicate.init(format: "sector_id == %@", sector.ID)
//Perform the inital update
batchUpdateRequest.propertiesToUpdate = ["sector_id" :sector.ID, "SECTOR_NAME" : sector.SECTOR_NAME]
// Execute the request to do batch update and merge the changes to viewContext, which triggers the UI update
do {
let batchUpdateResult: NSBatchUpdateResult = try BackgroundContext.execute(batchUpdateRequest) as! NSBatchUpdateResult
if let UpdatedObjectIDs = batchUpdateResult.result as? [NSManagedObjectID] {
NSManagedObjectContext.mergeChanges(fromRemoteContextSave: [NSUpdatedObjectsKey: UpdatedObjectIDs],
into: [Context])
}
} catch {
print("Error: \(error)\nCould not batch update existing records.")
return
}
//******************** End of Update Sectors *****************************
}
}
}
}
struct SectorsModel：可映射{
case SECTOR_NAME = "SECTOR_NAME"
case ID = "ID"
case SECTOR = "SECTOR"
}