Xcode 3.2 and Programming in Objective-C (book)

[tangoravi]

What template do I use to do the assignments? In Xcode 3.2, the New Project dialog does not have Command Line Utility as a choice in the templates.

[tdg911]

 click new project.  on the left click applications, right click command line tool, drop down list to select foundation.  I've included a screen shot of what it looks like.

Hope this helps.

T

[skochan]

Thanks for posting that.  I wasn't aware of the changes.   Just finished installing Snow Leopard tonight.

Cheers,

Steve Kochan

[c is 4 cookie]

omg you saved my azz.

Steve, feel free to delete my new post asking about this in the Welcome forum lol However if it wasn't for Google I wouldn't have found this other thread ironically enough.

EDIT: A

Code: (Objective-C)

Proj1.m:6: error: expected expression before '@' token

message won't go away.





Thanks

[slessardjr]

sounds to me something isn't installed right or something's set wrong.  If  you could zip you project folder and add it to your post I'd be glad to see what went wrong.  I could even test it on my machine if you'd like. 

Sorry I couldn't be more immediate help, but it's sometimes hard to diagnose a problem from a picture

[slessardjr]

Looking at it again... add this piece of code before int main....

Code: (Objective-C)

#import <Foundation/Foundation.h>

That may be your problem.  The foundation framework needs to be imported so the program knows what NSLog is.  Thats why it says expression before '@', because the compiler does not know what NSLog is without the foundation framework.

[Stephen F.]

This is just a guess, but it might be an issue with the double-quotes used in that NSLog line. If you look closely, there are are slanted double-quote characters, whereas in my Xcode, the double-quotes are straight.

 - My Xcode has this: "
 - Pictured Xcode has this: ”

Slanted or curly quotes would not be recognised by the compiler, and it could just be that that code snippet was copied and pasted from the PDF of the slides, rather than typed into Xcode directly. Keynote, Powerpoint, Word and other such tools have automatic "smart" character replacement options to switch straight quotes with fancy quotes.

On the other hand, maybe the Japanese Unicode font being used there just has stylised slanted quotes rather than straight ones. Are you using a US English keyboard layout, or a Kotoeri or other Asian layout? If you're typing on a non US English keyboard layout, Mac OS X may be helpfully substituting characters you type for Unicode characters. Those "\342" sequences in the error message look like escape sequences, perhaps for Unicode characters.

Maybe try typing the program in again from scratch, and if that doesn't work, switch to the US English interface localisation and keyboard layout in Mac OS X, restart Xcode, create a new project, and try again.

[c is 4 cookie]

 

To all noobs like me, do NOT copy and paste from PDF's OR make sure you fix the slanted quotes.

Thanks Steve for the heads up and thanks for others who tried to help.

Between the new Xcode labeling things differently and not knowing about different quotation marks, step 1 has already made me feel like a tool   I guarantee I won't be the only one trying to figure out wtf went wrong on day one.

Also after building and running nothing happened. It did complete successfully though. I guess I was expecting to receive encrypted NSA codes from the heavens above.

Sure hope that DVD comes out soon.

[Grossmisconduct]

Hi! I am a total noobi and iv also had a problem programming with Xcode 3.2. When i build and run Program 3.2 the debugger returns a long list of greek. Iv added my file as I saw you requested in another post. i hope you could find time to read it and see if you have an explanation

[rgronlie]

If you read the 'Greek' carefully it explains what the problem is.

2009-09-24 11:22:47.549 DA3[3512:a0f] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** +[Fraction<0x1000010d0> init]: cannot init a class object.'

You are calling myFraction = [Fraction init]; but init is an instance method not a class method so you need to pass the init message to myFraction instead.

Code: (Objective-C)

myFraction = [myFraction init];

Ryan

[Grossmisconduct]

Thank you, Ryan! And for the fast reply too! I cant believe I missed that one, ive checked my text for miss-spellings 15 times. And sorry for posting this under the wrong subject, but it was to me the most probable cause after thinking id done a thorough miss-spelling check. Now I im looking forward to continuing reading my book

[waynesel]

Has anyone posted a list of changes between Xcode 3.2 and the Video and or the Book?

Really new guy

[skochan]

There isn't a list but there aren't many references to XCode or to screen shots in the text.  The figure at the top of this post covers the most significant change in getting started.   The only place you might get stuck again is in Chapter 21; there are some slight differences in the screens when creating a new iPhone application.  Those have been updated in the video webcasts (not the LiveLessons ones, the webcast-recorded ones).

Cheers,

Steve Kochan

[waynesel]

Thank You Very Much.  I was a 4th Dimension programmer way back when Guy Kawasaki was there and have just decided to get back into the Frey with the iPhone/iPad, looks like fun.  No other language experience.

Thanks Again

[hnickm]

OK, thanks for the above.
Here's another noob question:
pg 134, fig 7.1 Under "Cocoa">"Objective-C class".
The new Xcode (3.2.1) doesn't look anything like the figure.
I can't figure out how to add the new class.

Thanks for any help.
Nick