找不到源商店的模型 [英] Can't find model for source store

问题描述

我是不熟悉C语言开发的新手.在继承别人的项目中.

I am new to objective C development. In inherited someone else's project.

我看到在他的项目中，他有一个名为Model的文件夹.其中是文件

I see that in his project, he has a folder called Model. In it are the files

Product.h
Product.m
Compatible.h
Compatible.m
Model.h
Model.m
MyProject.xcdatamodeld

几天前，按照在Product.h和Product.m中看到的编码样式，我创建了两个新文件，分别称为Warehouse.h和Warehouse.m.我还在Model.h和Model.m中编写了一些函数，这些函数可以帮助我获取新的Warehouse.然后，通过在XCode中打开该文件，单击添加实体"，重命名该实体并添加必要的属性，在MyProject.xcdatamodeld中创建了一个新实体.

A few days ago I created two new files called Warehouse.h and Warehouse.m, following the style of coding I saw in Product.h and Product.m. I also wrote some functions in Model.h and Model.m that helped me grab new Warehouses. I then created a new Entity in MyProject.xcdatamodeld by opening that file up in XCode, clicking Add Entity, renaming the entity and adding the necessary attributes.

我能够在项目的其余部分中使用这个新的类/模型.

I was able to use this new class/model in the rest of my project.

今天，我决定在Warehouse.m中添加一些新属性.然后，通过单击新属性按钮，将新属性添加到MyProject.xcdatamodeld中.

Today, i decided to add some new properties to my Warehouse.m. I then added new attributes to the MyProject.xcdatamodeld by clicking on the new attribute buttons.

现在我的项目在启动时就崩溃了，给了我错误Can't find model for source store.

Now my project crashes right when it starts up, giving me the error Can't find model for source store.

我做错什么了吗?我隐约记得有人告诉我这是模型更改的令人头疼的事情.有人可以推荐我阅读该主题吗?以及我该如何解决我的情况?

Am I doing something wrong? I vaguely remember someone telling me it's a headache of the model changes. Can someone recommend me reading on the subject matter? And how i can fix my situation?

推荐答案

我去了MyProject.xcdatamodeld.然后单击左侧导航中的配置".然后我注意到一个显示以下内容的表:

I went to MyProject.xcdatamodeld. Then clicked on "Configuration" in the left navigation. Then I noticed a table showed up with the following contents:

Entity      Abstract        Class
Compatible  un-checkbox     Compatible
Product     un-checkbox     Product
Warehouse   un-checkbox

我注意到Warehouse行没有Class的值.因此，我在其中输入了Warehouse.然后一切正常.

I noticed that the Warehouse row didn't have a value for Class. So i typed in Warehouse in to it. Then everything worked.

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