ios - 核心数据崩溃获取

Question

这是崩溃报告的内容:-

致命异常:NSInvalidArgumentException -[_PFFetchPlanHeader _genericValueForKey:withIndex:flags:]: 无法识别的选择器发送到实例 0x282b24730

发生崩溃的代码部分:-

    let managedContext = CoreDataHelper.getNSMangedObjectContext()
    let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: NotificationPersistenceHelper.UserNotification_entity)
    fetchRequest.predicate = NSPredicate(format: "\(NotificationPersistenceHelper.uniqueID) = %@", argumentArray: [uniqueId!])
    do{
         let results = try managedContext.fetch(fetchRequest)

        return  !results.isEmpty
    }catch let error as NSError{
        AppDelegate.getAppDelegate().log.error("Fetch Failed : \(error.localizedDescription)")
    }
    return false

崩溃发生在上述代码的以下行:-

  let results = try managedContext.fetch(fetchRequest)

关于为什么会发生崩溃的任何帮助，人们都尝试了很多，但无法找到崩溃的原因。有什么帮助吗？....提前致谢

Answer 1

代替这个

fetchRequest.predicate = NSPredicate(format: "\(NotificationPersistenceHelper.uniqueID) = %@", argumentArray: [uniqueId!])

试试这个

fetchRequest.predicate = NSPredicate(format: "%K == %@", #keyPath(NotificationPersistenceHelper.uniqueID), uniqueId!)