xcdatamodel

I have a problem with a Data Model using Core Data. 1/ I've created a data model on xcode 4.1 (on lion) with my entities and their relationships. In the inspector on the right i've checked "Tools version" : Minimum : Xcode 3.2 instead of Xcode 4.1. 2/ When i try to reopen my project, in Xcode 3.2.5 (on snow leopard), I click on "mydatamodel.xcdatamodeld", then on "mydatamodel.xcdatamodel", but nothing happen ! It's like my xcdatamodel file was empty but it's a 4.9 Mo file ! My xcdatamodel file refuses to open and it's very frustrating. 3/ I've tried just to add only the xcdatamodel file which

In my xcdatamodel two new fields, byTitleIndex and compoundIndex , are showing under Fetch Index Elements. I have not seen this section before in Xcode. What is a Fetch Index Element? Fetch Index Elements are part of Apple’s new indexing API, announced at WWDC 2017. They allow you to specify one or more Index Elements; properties that are used to create an index for faster database searches. In your case, the "title" property will be used to create an index called “compoundIndex” under your "Passage" entity, allowing for faster title searches. Announcement: https://developer.apple.com/videos

I still have an xcdatamodel file. However, when I created a new project, xcode generate an xcdatamodeld file (with a d). I want to convert my xcdatamodel file into xcdatamodeld file. I know that xcdatamodeld is some form of directory. How would I do that? I can't copy the entity to the xcdatamodeld file Matthias Bauch My answer from How to create the magic .xcdatamodeld folder / package? : To create a model bundle you select the single model, open the Editor menu in the main menu and select Add Model Version… . 来源： https://stackoverflow.com/questions/5850401/how-to-turn-xcdatamodel-file-into

i have a simple iphone project which contains a simple xcdatamodel that has a single entity with roughly 3 attributes.. i want to know if there is a way to programmatically add an attribute to an entity.. i.e. if the user presses an "add" button of some kind, a simple string attribute is added to the entity and saved.. If this is not possible could someone point me in the right direction.. You can programmatically alter entities but you can't alter a managed object model after it has been assigned to a managed object context so that makes it useless for any user defined alterations. In any