Core Data Tutorial

The project in the Core Data Tutorial for iOS.

Source code in Locations.zip

  1. main.m
  2. Class LocationsAppDelegate
  3. Class RootViewController
  4. Class Event
  5. Locations.xcdatamodel

Where is the data actually stored?

Add the following statement to the application:didFinishLaunchingWithOptions: method of the application delegate. 

	NSLog(@"%@", [self applicationDocumentsDirectory]);

[Session started at 2011-05-06 13:53:34 -0400.]
2011-05-06 13:53:36.208 Locations[69133:207] /Users/myname/Library/Application Support/iPhone Simulator/4.1/Applications/7432C96A-09CC-4585-A2C7-C6D457110488/Documents

Type the following commands into a Terminal window on your Mac. The single quotes are needed because the pathname has a blank. 

cd '/Users/myname/Library/Application Support/iPhone Simulator/4.1/Applications/7432C96A-09CC-4585-A2C7-C6D457110488/Documents'
pwd

ls -l
-rw-r--r--  1 myname  staff  20480 May  6 13:45 Locations.sqlite

sqlite3 Locations.sqlite .dump
BEGIN TRANSACTION;
CREATE TABLE ZEVENT ( Z_PK INTEGER PRIMARY KEY, Z_ENT INTEGER, Z_OPT INTEGER, ZLONGITUDE FLOAT, ZLATITUDE FLOAT, ZCREATIONDATE TIMESTAMP );
INSERT INTO "ZEVENT" VALUES(11,1,1,-73.991460537937,40.7295659479561,326396716.2045);
INSERT INTO "ZEVENT" VALUES(12,1,1,-73.991460537937,40.7295659479561,326396717.092048);
CREATE TABLE Z_PRIMARYKEY (Z_ENT INTEGER PRIMARY KEY, Z_NAME VARCHAR, Z_SUPER INTEGER, Z_MAX INTEGER);
INSERT INTO "Z_PRIMARYKEY" VALUES(1,'Event',0,13);
CREATE TABLE Z_METADATA (Z_VERSION INTEGER PRIMARY KEY, Z_UUID VARCHAR(255), Z_PLIST BLOB);
INSERT INTO "Z_METADATA" VALUES(1,'4FAE096B-41AF-47B0-902D-54A476687DB8',X'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');
COMMIT;