Core data How to view Objectid

Source: Internet
Author: User

Objectid is the unique ID identifier provided by core data for each data object, and the method for obtaining Objectid and printing is as follows:


1. Get ManagedObject

2. ManagedObject-ObjectID

3. URL ObjectId

4. URL-String

        Nsmanagedobject *managedobject = youmanagedobject;//Gets the object pointer        nsmanagedobjectid *objid = [ManagedObject objectid];//get ObjectID                nsurl * uri = [objId urirepresentation];//objectid-> URL        nsstring *s = [URI absolutest Ring];//url-> String                NSLog (@ "uri =%@", s);//print Objectid corresponding string

Result instances

URI = X-coredata://8fa76f17-3846-4801-b398-80ee9e13ea14/event/p1uri = x-coredata:// 8fa76f17-3846-4801-b398-80ee9e13ea14/event/p2uri = X-coredata://8fa76f17-3846-4801-b398-80ee9e13ea14/event/p3

Core data How to view Objectid

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