swift - 将数据添加到核心数据时出现问题 - nil 不是合法参数

Question

我收到这个错误:

2018-09-08 17:53:36.795035+0200 Movie Roulette[826:263749] [error] error: Failed to load model named ett CoreData: error: Failed to load model named ett 2018-09-08 17:53:36.796536+0200 Movie APP[826:263749] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+entityForName: nil is not a legal NSManagedObjectContext parameter searching for entity name 'MovieData''

也许你们中的一些人可以帮助我解决这个问题。我已经搜索并阅读到我必须创建一个 NSManagedObjectContext。我已经在我的 func 中创建了它，但我仍然收到此错误。

func save(name: String) {
    guard let appDelegate =
        UIApplication.shared.delegate as? AppDelegate else {
            return
    }

    // 1
    let managedContext =
        appDelegate.persistentContainer.viewContext
    // 2
    let entity =
        NSEntityDescription.entity(forEntityName: "MovieData",
                                   in: managedContext)!

    let MovieDT = NSManagedObject(entity: entity,
                                  insertInto: managedContext)

    // 3
    MovieDT.setValue(name, forKeyPath: "titel")

    // 4
    do {
        try managedContext.save()
        movieArray.append(MovieDT)
    } catch let error as NSError {
        print("Could not save. \(error), \(error.userInfo)")
    }
}

Answer 1

这个问题只有在模型名称更改时才会发生，在 AppDelegate 中

let container = NSPersistentcontainer(name:"thisMayChanged")
container.loadPersistentStores......

崩溃时清晰

CoreData: error: Failed to load model named ett

项目名称为Movie APP

Movie APP[826:263749]

您将原始名称更改为 ett，因为默认情况下它应该是 Movie_APP