Comments on: iPhone Programming Tutorial – Creating a ToDo List Using SQLite Part 1

By: The Complete iPhone Development Toolbox | iPhoneApp Dev Blog

The Complete iPhone Development Toolbox | iPhoneApp Dev Blog — Sat, 06 Mar 2010 15:16:44 +0000

[...] Create a To Do List using SQLite – Part 1 of a 4-part tutorial on saving and accessing data using an SQLite database. [...]

By: Paula

Paula — Fri, 05 Mar 2010 17:07:40 +0000

> todo.h and todo.m instand (sic) of Todo.h and Todo.m

The case of the filenames *NEVER* makes any difference.

By: Kimberly

Kimberly — Fri, 05 Mar 2010 16:56:09 +0000

Never pick a framework based on “whichever 1 is the biggest… must be the correct one”.

Ugh.

Are you kidding me?????

Pick the *POINTER* file… and it will *ALWAYS* point you to the correct one.

Duh.

By: Mr.kang

Mr.kang — Tue, 02 Mar 2010 19:28:17 +0000

I had the same problem. I had my todo classes named : todo.h and todo.m instand of Todo.h and Todo.m. Not it’s fully working.

Be carefull with the cases !

By: Frank M

Frank M — Tue, 02 Mar 2010 19:21:32 +0000

Hey Brandon!

I have the same problem as a few have and no one gave us an answer. In todoAppDelegate.m, I have an error with :
Todo *td = [[Todo alloc]…
‘Todo undeclared’
‘td undeclared’

Can you help us out? Thanks!

By: magichand Interaction -魔法交互 – iPhone Application And Website Development: All Tools And Tutorials You Need

Sun, 07 Feb 2010 10:01:31 +0000

[...] a ToDo List Using SQLite – Part 1 -Part 2 – Part [...]

By: Minha361

Minha361 — Fri, 05 Feb 2010 07:39:27 +0000

hi please tell me why the code (iPhone Programming Tutorial – Creating a ToDo List Using SQLite Part 1) don’t run on Simulator – 3.1.2 how fix thix error. thanks very much

By: Gig

Gig — Sat, 23 Jan 2010 21:41:38 +0000

Cannot find libsqlite3.0.dylib in my mac! Where can I find it?

By: Marston

Marston — Mon, 18 Jan 2010 02:28:33 +0000

Hi Brandon,

I got to thinking that maybe XCode wasn’t able to find the ToDo.h file from the AppDelegate.

In order to test this, I just dropped the ToDo .h and .m files and added TewDew .h and .m files with all the same code inside them.

Now everything works just fine. Maybe somehow XCode was retaining a path outside of the file I was trying to specify.

In my further searching for the error I got before, I did see people reporting a similar issue. Any thoughts?

Thanks Again,
Marston

By: Marston

Marston — Fri, 15 Jan 2010 18:05:07 +0000

Hi Brandon,

I think your blog is the best iPhone development blog I have run across. I like the combination of instruction, examples and downloadable sample code.

I am writing because I was wondering if you had any tips for troubleshooting a particular problem I am having with this tutorial.

Everytime I try running the code I get this error: ”

‘ToDo’ undeclared (first use in this function)”

right at the point where I try to use the ToDo class in the app delegate class initializeDatabase method (e.g. ToDo *td = [[ToDo alloc]…).

I made sure to import the ToDo.h class in the ToDoAppDelegate.m file as well as make sure I am importing the framework into the ToDoAppDelegate.h file.

Any thoughts?

By: Viswajeet

Viswajeet — Fri, 01 Jan 2010 11:30:59 +0000

Hi Brandon,

I am like a new born baby, in this world of iPhone Development, and you are like a Father to me in this world, making me learn the basics by your great tutorials…

Well currently I am finding hard to remember the various syntax and the semantics of iphone coding..but with the passage of time I will cop up with that…

The thing that I want to know from you currently is that, if i want to develop a application in which I want the Database to be shared by all the iphone users who get the setup of my application on their cells, then is that possible..

And if possible then
how the DB should be created
where it should be stored
how the connection to the DB should be established.

Please Reply to this comment ASAP…
Waiting…

By: neil

neil — Tue, 29 Dec 2009 13:43:35 +0000

Don’t know, what I’m doing wrong. The only thing I get is a blank table view and a blank navigation bar, although the SELECT is fine.

iPhone 3GS, German

By: Jeff Bloch

Jeff Bloch — Sun, 27 Dec 2009 14:45:50 +0000

Can the SQL database be maintained remotely on a server, rather than on the iPhone itself?

I would like to be able to send a Yes/No questions to thousands of people and have their responses, and some other data, be added to a remote database to be analysed later.

If so, what would be required on the server side?

Thanks!!

By: Shane Courtney

Shane Courtney — Mon, 14 Dec 2009 14:55:14 +0000

Hi Sorry, spelt class todo.m instead of Todo.m. Still getting the error ‘database’ undeclared with the line
if (sqlite3_open([path UTF8String], &database) ==SQLITE_OK){.

Can anyone please let me know what i could be doing wrong. Many thanks, Shane

By: Shane

Shane — Sun, 13 Dec 2009 21:03:09 +0000

Thanks for great tutorial, i have two queries when i run my code and was wondering if any of you guys could help me.
In InitializeDatabase we have the lines:

Todo *td= [[Todo alloc] initWithPrimaryKey etc

Is this suppose to be todo *td=[[todo alloc]? etc When i have Todo i get the error message ‘Todo’ undeclared.

Also in the line, if (sqlite3_open([path UTF8String], &database) ==SQLITE_OK){

i am getting the error ‘database’ undeclared. Sorry if these seen like stupid questions but i an just a beginner and am trying to do as many as tutorials as possible. Also does anyone know any other good tutorials like this?

Thanks in advance

By: Chet

Chet — Sun, 13 Dec 2009 02:11:10 +0000

I’d like to second Rob’s comment above. This is a less error-prone way to import frameworks than using the search option. It’s hinted at in Apple’s Core Data tutorial (http://developer.apple.com/iphone/library/documentation/DataManagement/Conceptual/iPhoneCoreData01/Articles/01_StartingOut.html), although it’s a bit unclear (“Use the General pane of the Info window for the application’s target”).

There are at least two ways of accessing this dialog:

1. Expand “Targets” in the “Groups and Files” panel.
2. Perform either of the following actions:
a. Select the target (“Todo”), and click the “Info” button found near “Build and Go” at the top of the Xcode window.
b. Right-click the target (“Todo”) and choose “Add” >
“Existing Frameworks…”
3. Click the plus sign in the lower left corner of the window.
4. Select libsqlite3.0.dylib and click Add.
5. Close the Info window.
Select the target (todo) in the groups and files panel.
2. Click the info button
3. Under the General tab, click the + button below “Linked Libraries”
4. Select libsqlite3.0.dylib and click the Add button

By: Girish

Girish — Wed, 09 Dec 2009 09:52:27 +0000

Actually it doesn’t matter how many rows you add in database from terminal…addition of deletion of rows is possible only via the edit and add buttons provided….. Isn’t it a required rectification….

Brandon please take a check into it…..If the data is not updated in the database then where does it comes from next time when executed after update by the add or edit buttons provided by you????

By: Girish

Girish — Wed, 09 Dec 2009 09:37:47 +0000

Please tell me that if inside the project folder that i downloaded as a sample code if we delete or add a row from database then it’s not updated when the application is executed next time…while update successfully occurs in database and visible when checked through select * …. query….

By: CW

CW — Fri, 04 Dec 2009 07:54:31 +0000

I am trying to build against an iPhone running 2.2.1. I can build to the simulator while it is set to use 2.2.1 and all is fine but when building for the device it fails with “file is not of required architecture” referring to libsqlite3.0.dylib

By: CW

CW — Fri, 04 Dec 2009 07:51:39 +0000

Anyone have an answer to Eddy’s question above?
“file is not of required architecture”

By: dgraham

dgraham — Thu, 03 Dec 2009 04:18:42 +0000

Totally mis-read the start of your next tutorial. Please ignore my stupid question above…

By: dgraham

dgraham — Wed, 02 Dec 2009 11:46:45 +0000

Hi, great tutorials. Really love them. However I ran into a problem.

When I finish this tutorial no list is displayed when I compile and run the code… In the Fruits tutorial we edited the

numberOfRowsInSection and
cellForRowAtIndexPath

functions to display the fruits. But, in this tutorial, you don’t mention doing that. Is that why nothing displays? However, in your part 2 of this tutorial you start off with it display stuff despite saying at the end of this one that “it won’t display anything”.

Sorry I am confused!

Cheers!

By: sam

sam — Tue, 24 Nov 2009 02:30:44 +0000

Hi Brandan,

Great work & tutorial for the new ones like me. I have used you example and tried a very simple modification – instead of NSString, I used the UITextField, and tried to display name and value in the ViewDidLoad. When I run, I am having ‘out of memory’ error at “select name, value from tab1″ prepare statement. Could not figure the issue. Can you help ??

I am trying to do is add / update rows with Update button, and display the rows from DB while appl starting.

Just started learning ..
Thanks,
Sam.

By: hugo

hugo — Fri, 13 Nov 2009 03:54:39 +0000

hi brandon!

i tried to check if someone has mentioned this before… but the SQLite DB can be easily created with Mamp (which has a free version)… and with a bit of work you can migrate bigger DBs through the phpMyAdmin… have not tried it yet, but seems pretty simple (i will try and post the results)…

all the best! you rock!

By: Eddie

Eddie — Fri, 13 Nov 2009 03:01:22 +0000

Hello,

Great tutorials. It is a great start but I have a problem with my sqlite3. I’m on Snow Leopard with xCode 3.2 and I was trying out your tutorial on sqlite3 but I got an error, “file is not of required architecture”. Do you know of any solution? Thanks

By: sam

sam — Mon, 26 Oct 2009 20:41:21 +0000

I just upgraded to 3.1.2 and the new stuff ad this will not compile or run. The frame work files are listed in red in the groups and files section. Is there an updated version of this code or something?

- Sam

By: Mark

Mark — Thu, 22 Oct 2009 20:52:50 +0000

Great tutorial! I made SQLite even more simpler with a library which I would like to share the CMSQLiteDatabase library to be more precise. With this it’s really easy to create and manage your database from within an application.

You can download it for free at http://www.crystalminds.nl/?page_id=1287. Enjoy.

Less writing, though it’s always nice to have background information on how SQLite can be raw implemented.

By: SQLite tutorial « Ramblings

SQLite tutorial « Ramblings — Mon, 19 Oct 2009 19:00:29 +0000

[...] http://icodeblog.com/2008/08/19/iphone-programming-tutorial-creating-a-todo-list-using-sqlite-part-1... [...]

By: Rob

Rob — Tue, 06 Oct 2009 17:16:04 +0000

Great tutorial. Thanks.

Another option for adding the libsqlite3.0.dylib to the project:

1. Select the target (todo) in the groups and files panel.
2. Click the info button
3. Under the General tab, click the + button below “Linked Libraries”
4. Select libsqlite3.0.dylib and click the Add button

By: Jay

Jay — Thu, 01 Oct 2009 04:31:18 +0000

Jeremy said that he downloaded the code. Where did you download it from? Do not have to retype all this code?

This is the best tutorial site I have ever seen. I have chosen this one as my first attempt to start learning iPhone development.

I am getting an error when I go to build and run this. The problem is with line:

Todo *td = [[Todo alloc] initWithPrimaryKey:primaryKey database:database];

The error is: bothe “Todo” and “td” undeclared. HELP!