I have an app that I\'m building where it has some data built into it that is contained in a core data data model.When I run the app to the simulator, the data is there and everything is peachy.
I\'m still fairly new to using NSPredicate, but I\'ve got a somewhat complica开发者_运维技巧ted issue and I\'m not quite sure the best way to go about a solution.
I\'ve had this happen a few times. The contents of proj.xcdatamodeld/proj.xcdatamodel/ randomly disappear off my hard drive. However, Xcode will open the model file just fine.
I would like to update my app, but I have completely changed the data structure, so is th开发者_运维知识库e Core Data model entirely different. Now, the data in the app does not have to be preserved,
I understand it may be unpacking some sort of compressed package into the file system (and due to the mobile nature I suppose it may be quite aggressive compression to reduce download time). But does
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I am a newbie to coredata never worked with it, right now, I am working on a project on which some work has already been done by the previous developer. Coredata is开发者_Python百科 being used in savi
Pe开发者_如何学JAVArfect KVO here includes two parts: add observer correctly and remove observer correctly.
Entity B (Book) has a one-to-many relationship with the entity D (Description). The idea is that a book has different descriptions for different languages.
I still muck up wi开发者_如何学Cth bool\'s in my core data config data.The NSManagedObject for say a core data \"config\" class one can quickly type in the following and you don\'t get an error:
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