I made a mac application to pre-populate the database for my iPhone application. Basically I followed the traditional method of saving a .sqllite file and then replacing it in the Application Support. That works, but the problem is with the mac application . It just builds and runs for one time. The next time when I Build and Run and click on "Add" to add a record, it says in the console: "Core Data: Failed to create new object".
What could be the problem?
Thanks
Problem Solved. The iPhone project mine of had the custom classes declared for the data model. And since I was using the same data model in my mac application, I needed to import the custom class and it's implementation into the mac application as well.
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I have 3 build configurations, Debug, Release and Development. For Development I have created a new Scheme with a new bundleID, Product name etc so I can see which one is DEV and DEBUG on my phone.
I am using Core Data and for the DEBUG with the original bundleID everything works fine, but when I switch to use the Development one, I get an error when I try to create a new entity with name:
NSEntityDescription.insertNewObject(forEntityName: "MyEntity", into: managedContext)
The error I get:
Could not cast value of type 'NSManagedObject_MyEntity_' (0x600002d62b20) to 'AppName_DEV.MyEntity' (0x102bf9368).
It seems like it is trying to get the MyEntity class from my "AppName DEV" scheme not the "AppName". I can't find any Build Settings where I could point it to use the same model?
Any ideas on how to use core data with multiple build configurations?
Ok, I found the problem. Since I was trying to revive a very old app originally written in swift 2, it occurred to me that I might double check how was the data model created. After hours of tinkering with the core data set up process, I changed 2 things that finally get it to work.
1.) In the .xcdatamodeld file, on the right side in the Data Model Inspector, make sure that you have the Module field EMPTY I had my AppName Inside, which was the same as the original target name.
2.) I added #objc(EntityName) to the NSManagedObject subclass I had.
Of course I cleaned the project, deleted the app from the simulator and installed it again.
If you have an issue like that, hope that whis will help you, good luck!
I have created an ios application that can talk to the database and get the messages from the server and all i want to do now is to distribute this aplication as a templet and other application can import my current project and use it, Now i been went throw many tricks and tips such as making an Static framwork using xcode bundles and Aggregate target type and got it work with some script found hear: http://codefriend.blogspot.com.au/2011/09/creating-ios-framework-with-xcode4.html
what i want to know is whether its the correct approach for such a problem or should i been looking at something else. All i want to create is an framework for my team so that they can produce other application
without worrying about or writing same files and code again and again. And is it possible to bundle all the .xib and .html files too?
This is what we use to create framework:
https://github.com/kstenerud/iOS-Universal-Framework
I am being presented with a very interesting project. The task that I must complete is to figure out a way to allow a partner to be involved in an app without giving up their source code. The code will be included in the main bundle of the app so it is not dynamically stored. The partner has a fully functional app that is needed to be ran in a window within the main app at the appropriate time. I know having the partners create a web app would be ideal so it is treated like a webpage but I am more concerned with codes that must be written natively in iOS.
My question is what is the best way to go about solving this? In theory it is like an App within an App. Is there a way if they gave up their .app file I can include this in the bundle and then run it when I catch a certain event? Should I have the partners create their code in a framework and then import into the shell project? What is the best way to approach this problem?
If your 2nd-party doesn't want to provide you with the source code, why doesn't he compile it to object code then let you simply link it to your app?
By the way, at least on official (non-jailbroken) iDevices, apps can't 'embed' or 'open' one another in such a way - you can open an app programmatically if 1. it's a separate app 2. it has a registered special URL associated to its bundle.
Is there a way if they gave up their .app file I can include this in
the bundle and then run it when I catch a certain event?
No, you'll want to have them create a library instead. You can then include that library in your project.
Creating a library is as simple as:
Choose File->New...->Project... in Xcode.
Select the "Cocoa Touch Static Library" project template.
Add your code.
Build.
The result is a static library that you can add to your application(s). The library will contain the compiled code that you added, but doesn't include the source code. The library developer should provide whatever header files are necessary to use the code in the library.
An App within an App is possible however it requires a common data framework that allows one app to reference the same data without confusing the the source of and destination of the data.
Such a framework allows one app to interact with another app referencing the same data.
I am creating an application using Core Data. But When I run my app it crashes. It shows me this reason:
reason = "The model used to open the store is incompatible with the one used to create the store";
What should I do now?
I think you need to refer this link and refer to answer given by Grouchal in the link below:
What do I have to do to get Core Data to automatically migrate models?
If you need any further help please do let me know.
Hope this helps you.
It means that you created a model, run the app, modified the model (by adding or removing managed objects, renaming object properties and so on...) and reopened the app without migrating the data first. I still have to try this by myself but, you should definitely take a look here: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreDataVersioning/Introduction/Introduction.html
You can just delete the app (icon) from the simulator or device. Then, rebuild and run.
As dave explained, you have modified the core data structure (the store). If you're using the standard template, in the new rebuild a new model (NSManagedObjectModel) will be created that is compatible with your newly modified store.
You will probably be making many changes to the core data structure (adding or deleting an entity or some property or relationship), and, each time you do, you can just delete the app from the simulator or device.
I am trying to generate classes for my .xcdatamodel entities, but am not given the Manage Object Class option when I click on an entity and select File>New File. I've looked under both the iPhone and Mac OS X catagories, but it is not listed anywhere.
Here are the steps I am taking,
I create a new project being sure to check the "Use Core Data" checkbox. Once the project is created, I open .xcdatamodel, create an entity, and add a few attributes. Next, I click on the entity and choose File>New File, but all I see are only Objective-C, Objective-c test case class, and UIVewController subclass.
Am I missing a step?
Thanks in advance
Take a look at the Core Data Tutorial for iPhone OS and look at this section: Custom Managed Object Subclass. If you still aren't seeing the Core Data related items for the iPhone OS check the version of the SDK you are targeting. I believe Core Data has only been available since SDK 3.
Had the same problem. Restarting x-code helped me.