Xcode 3.0 beginner

Where can I find tutorial to learn how to program using xCode 3.0?
Is it reasonable to begin learning how to program using xCode?
I need to start with the absolute basics please help point me in the right direction if you can.

Frozen Tundra wrote:
1. Do you have author names for the 2 books.
1. Stephen Kochan
2. Aaron Hillegass
2 Do you think objective-c and cocoa are the right path for my goal?
Yes
Mihalis.

Similar Messages

Hello...i have a problem with xcode...i am a beginner user on mac and i am learning to program in C but lastime when i tried to compil a file with xcode it doens't function at well and i dont know while...her is my code source if somebody can help me

#include <stdio.h>
#include <stdlib.h>
#define N 20
int main (int argc, const char * argv[])
{ FILE *fp;
    char nome_file[N];
    int i,j;
    int dim;
    float mat_in[N][N];
    float mat_out[N][N];
        // apertura del file
    printf("nome_file:");
    scanf("%s",nome_file);
    fp=fopen(nome_file, "r");
    if (fp==NULL) {
        printf("errore nell'apertura del file %s\n",nome_file, );
        return -1;
    fscanf(fp, "%d",&dim);
    printf("%d\n",dim);
    for (i=0; i<dim; i++) {
        for (j=0; j<dim; j++) {
            fscanf(fp, "%f",&mat_in[i][j]);
            printf("%.2f",mat_in[i][j]);
    int ordine_grandezza=1;
    for (i=0; i<dim; i++) {
        for (j=0; j<dim; j++) {

here is my complete code source:
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#define N 20
int main (int argc, const char * argv[])
{ FILE *fp;
    char nome_file[N];
    int i,j;
    int dim;
    float mat_in[N][N];
    float mat_out[N][N];
        // apertura del file
    printf("nome_file:");
    scanf("%s",nome_file);
    fp=fopen(nome_file, "r");
    if (fp==NULL) {
        printf("errore nell'apertura del file %s\nnumero errore: %d",nome_file, errno);
        return -1;
    fscanf(fp, "%d",&dim);
    printf("%d\n",dim);
    for (i=0; i<dim; i++) {
        for (j=0; j<dim; j++) {
            fscanf(fp, "%f",&mat_in[i][j]);
            printf("%.2f",mat_in[i][j]);
    int ordine_grandezza=1;
    for (i=0; i<dim; i++) {
        for (j=0; j<dim; j++) {
            if (mat_in[i][j]<=0){
                mat_out[i][j]=0;
            else {
                while (mat_in[i][j]>ordine_grandezza) {
                    ordine_grandezza=ordine_grandezza*10;
                mat_out[i][j]=ordine_grandezza;
    for (i=0; i<dim; i++) {
        for (j=0; j<dim; j++){
            printf("%8.2f",mat_out[i][j]);
        printf("\n");
    int simmetric=0;
    for (i=0; i<dim && simmetric!=1; i++) {
        for (j=i+1; j<dim && simmetric!=1; j++){
            if (mat_out[i][j]!=mat_out[j][i])
                simmetric=1;
    if (simmetric==1)
        printf("matrice simmetrica\n");
    else
        printf("matrice non simmetrica\n");
    return 0;
and when i compil it shows it:
nome_file:martin.txt
errore nell'apertura del file martin.txt
excuz me if i dont speak english very well....but i think that the problem is that i don't know to compil a file on xcode...and if yo can send me a tutorial about it i will be grateful

Beginner XCode/Java Question - printf problem

Hello,
I have just started playing around with XCode and Java. I entered the statement:
System.out.printf("%s\n%s\n", "Welcome to", "Java Programming!");
into the default working java project (File -> New Project -> Java Tool) and Im getting the error "cannot find symbol" after I compiled it. I do not believe this is a syntax error since it was copied straight from a textbook. So, my questions are:
1. What "symbol" is Xcode refering to?
2. Does Xcode coem with the latest version of Java?
3. How can I check the Java version?
4. Is there a library that needs to be imported to get it working?
Thanks in advance!

Hi Arcus
I think you might have to change some of the Xcode settings to force it to use Java 1.5. Try this:
- From the menu, select: Project > Edit Active Target 'Your Program Name'
- From the popup window, select Settings > Simple View > Java Compiler Settings.
- Set Target VM Version and Source Version to 1.5
- Dismiss the window by clicking on the red dot at the top left corner.
Best wishes
Bob

Xcode, how do you take an app from an idea to a data model, data structure, or class structure?

Hey everyone!
I'm a beginner xcoder and computer engineering sophomore and have literally spent every hour of the past few weeks reading as much as I possibly can about becoming a developer.
I've found plenty of documentation, and guides on how to do very specific things in xcode and objective-C but am still looking for more information on one topic; how do you decide which data models/structures/controllers etc to use?
I mean, you personally. I've been looking for a resource on this and have not been able to find one. I just finished Apple's iOS Developers Guide and they mention "choosing a data model" but do not describe them in much detail.
The following is what is provided in the guide:
● Choose a basic approach for your data model:
● Existing data model code—If you already have data model code written in a C-based language, you
can integrate that code directly into your iOS apps. Because iOS apps are written in Objective-C, they
work just fine with code written in other C-based languages. Of course, there is also benefit to writing
an Objective-C wrapper for any non Objective-C code.
● Custom objects data model—A custom object typically combines some simple data (strings, numbers,
dates, URLs, and so on) with the business logic needed to manage that data and ensure its consistency.
Custom objects can store a combination of scalar values and pointers to other objects. For example,
the Foundation framework defines classes for many simple data types and for storing collections of
other objects. These classes make it much easier to define your own custom objects.
● Structured data model—If your data is highly structured—that is, it lends itself to storage in a
database—use Core Data (or SQLite) to store the data. Core Data provides a simple object-oriented
model for managing your structured data. It also provides built-in support for some advanced features
like undo and iCloud. (SQLite files cannot be used in conjunction with iCloud.)
● Decide whether you need support for documents:
The job of a document is to manage your app’s in-memory data model objects and coordinate the storage
of that data in a corresponding file (or set of files) on disk. Documents normally connote files that the user
created but apps can use documents to manage non user facing files too. One big advantage of using
documents is that the UIDocument class makes interacting with iCloud and the local file system much
simpler. For apps that use Core Data to store their content, the UIManagedDocument class provides similar
support.
I suppose my question boils down to, how do you decide which structures to use? If you can provide an example of an app idea and how its implemented that would be very helpful and much appreciated!
For example, to implement the idea of an app which allows users to progress through levels of knowledge of a certain subject and rewarding them with badges and such (this is not an actual app just a whim) how would one model that?
Thanks in advance for all your help!!!

SgtChevelle wrote:
how do you decide which structures to use?
Trial and error.
I wish I had a better answer for you, but that pretty much encapsulates it. There is some, but not much, good wisdom out there, but it takes a significant amount of experience to be able to recognize it. The software development community if currently afflicted with a case of copy-and-paste-itis. And the prognosis is poor.
The solution is to be brutal to yourself and others. Focus on what you need and ignore everything else. Remember that other people have their own needs and methods and they might not be applicable to you. Apple, for example, can hire thousands of programmers, set them to coding for six months, pick the best results, and have the end-users spend their own time and monety to test it. If you don't have Apple's resources and power, think twice about adopting Apple's approach. And I am talking from a macro to a micro perspective. Apple's sample and boilerplate code is just junk. Don't assume you can't do better. You can.
Unfortunately, all this takes time and practice. You can read popular books, but never assume that anyone knows more than you do. Maybe they do and maybe they don't. It takes time to figure that out. Just do your best, ignore the naysayers, and doubt other people even more than you doubt yourself.

How can I read a serial port using XCode?

Hello,
I'm using an iMac 2009 with Mac OS X 10.6.7. I have a USB to Serial cable and I want to connect a hardware I made using a microprocessor Microchip PIC to my mac. I'd like to read values from the serial port and also write values to it. I'm already able to do this using the Terminal with the following command:
screen /dev/tty.usbserial 9600
I'd like to build my own application now. Does anyone could send me any sample code?
I'm using XCode 3.2.5 and I'm a beginner on XCode.

I looked at Dev Center for sample code, and I found this link:
http://developer.apple.com/library/mac/#samplecode/SerialPortSample/Introduction /Intro.html%23//apple_ref/doc/uid/DTS10000454-Intro-DontLinkElementID_2
I downloaded the sample Xcode project and, when I click on "Build and Run" button, it generates an error with the following message:
"GCC 4.2 is not compatible with the Mac OS X 10.4 SDK (file SerialPortSample.c)"
Maybe, it occurs because the code is too old (2005). I didn't find any newer sample.
Could you help me?
Thank you.

Product Menu items grayed out in Xcode

I am a beginner in Xcode, I was working on a tutorial material with a basic calculator project and when I added an icon file to the project the Run or any of the Product Menu options got grayed out. Previous to this change everything was running and building fine. Can anybody advice on how to get the Run option to be available again? My guess is that I did something wrong at the time of adding the new icon file to the project but I cannot figure out what was it.
I don't want to start all over.
Thanks,
Mario

Mark:
Thanks for the reply, I tried all options mentioned and nothing worked thou. What I decided to do is to use my timemachine backup and used the closest version to the last time the project ran properly, now I only have to re do just a portion of the project.

I got problem with Xcode 5

My source
// ViewController.m
// Calculator
// Created by APPLE on 4/6/14.
// Copyright (c) 2014 DinhXuanVu. All rights reserved.
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
-(IBAction)Number1:(id)sender{
    Select = Select *10;
    Select = Select +1;
    Screen.text= [ NSString stringWithFormat : @"%i", Select ];
-(IBAction)Number2:(id)sender{
    Select = Select *10;
    Select = Select +2;
    Screen.text= [ NSString stringWithFormat : @"%i", Select ];
-(IBAction)Number3:(id)sender{
    Select = Select *10;
    Select = Select +3;
    Screen.text= [ NSString stringWithFormat : @"%i", Select ];
-(IBAction)Number4:(id)sender{
    Select = Select *10;
    Select = Select +4;
    Screen.text= [ NSString stringWithFormat : @"%i", Select ];
-(IBAction)Number5:(id)sender{
    Select = Select *10;
    Select = Select +5;
    Screen.text= [ NSString stringWithFormat : @"%i", Select ];
-(IBAction)Number6:(id)sender{
    Select = Select *10;
    Select = Select +6;
    Screen.text= [ NSString stringWithFormat : @"%i", Select ];
-(IBAction)Number7:(id)sender{
    Select = Select *10;
    Select = Select +7;
    Screen.text= [ NSString stringWithFormat : @"%i", Select ];
-(IBAction)Number8:(id)sender{
    Select = Select *10;
    Select = Select +8;
    Screen.text= [ NSString stringWithFormat : @"%i", Select ];
-(IBAction)Number9:(id)sender{
    Select = Select *10;
    Select = Select +9;
    Screen.text= [ NSString stringWithFormat : @"%i", Select ];
-(IBAction)Number0:(id)sender{
    Select = Select *10;
    Select = Select +0;
    Screen.text= [ NSString stringWithFormat : @"%i", Select ];
-(IBAction)NumberCộng:(id)sender{
    if (RunningTotal == 0) {
        RunningTotal = Select;
    else {
        switch (Method) {
            case 1:
                RunningTotal = RunningTotal * Select ;
                break;
            case 2:
                RunningTotal = RunningTotal - Select ;
                break;
            case 3:
                RunningTotal = RunningTotal + Select ;
                break;
            case 4:
                RunningTotal = RunningTotal / Select;
                break;
            default:
                break;
        Method = 1;
        Select = 0;
-(IBAction)Numbertrừ:(id)sender
    if (RunningTotal = = 0) {
        RunningTotal = Select;
    else {
        switch (Method) {
            case 1:
                RunningTotal = RunningTotal * Select ;
                break;
            case 2:
                RunningTotal = RunningTotal - Select ;
                break;
            case 3:
                RunningTotal = RunningTotal + Select ;
                break;
            case 4:
                RunningTotal = RunningTotal / Select;
                break;
            default:
                break;
        Method = 2;
        Select = 0;
-(IBAction)Numbernhân:(id)sender{
    Method = 3
    if (RunningTotal == 0) {
        RunningTotal = Select;
    else {
        switch (Method) {
            case 1:
                RunningTotal = RunningTotal * Select ;
                break;
            case 2:
                RunningTotal = RunningTotal - Select ;
                break;
            case 3:
                RunningTotal = RunningTotal + Select ;
                break;
            case 4:
                RunningTotal = RunningTotal / Select;
                break;
            default:
                break;
    Method = 3;
        Select = 0;
-(IBAction)Numberbằng:(id)sender{
    if (RunningTotal == 0) {
        RunningTotal = Select;
    else {
        switch (Method) {
            case 1:
                RunningTotal = RunningTotal * Select ;
                break;
            case 2:
                RunningTotal = RunningTotal - Select ;
                break;
            case 3:
                RunningTotal = RunningTotal + Select ;
                break;
            case 4:
                RunningTotal = RunningTotal / Select;
                break;
            default:
                break;
    Method = 0;
        Select = 0;
        Screen.text = [NSString stringwithFormat: @"%.2f", RunningTotal];
-(IBAction)Numberchia:(id)sender{
    if (RunningTotal == 0) {
        RunningTotal = Select;
    else {
        switch (Method) {
            case 1:
                RunningTotal = RunningTotal * Select ;
                break;
            case 2:
                RunningTotal = RunningTotal - Select ;
                break;
            case 3:
                RunningTotal = RunningTotal + Select ;
                break;
            case 4:
                RunningTotal = RunningTotal / Select;
                break;
            default:
                break;
    Select = 0;
    Method = 5;
-(IBAction)Numberphẩy:(id)sender{
-(IBAction)NumberXoá:(id)sender{
    Method = 0;
    RunningTotal = 0;
    Select = 0;
    Screen.text = [ NSString stringWithFormat: @"0" ];
- (void)viewDidLoad
    [super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
- (void)didReceiveMemoryWarning
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
@end
I try to create Calculator application by Xcode and then I got Method definition for ... then Expected expression. Please help me and I'm beginner.

I believe a question like this needs to be posted in the Developer forums.
~Lyssa

How to understand the Xcode?

Through my whole life using computers generally, I have figured out that any software could be well understood by practice, but actually the case here seems much different.
My question is not regarding the interface, structure of the project...etc, I would like to understand the coding itself, where and when every code to be used and how it works, there are lots of codes those can be used in different cases, It is not possible that one person can understand every single tip of the Xcode or any other programming language, but I want to know at least which way should I take (courses, books, tutorial....), I want something that gives the general idea and concept of the things.
I am developing a game now, succeeded in creating some different pages of the game where it take you to the setting, high score...etc with some simple graphics, linked them together using the available options, but to make the game work it needs pages of coding, looking for sample codes is also not practical in my opinion.
I believe that understanding the top used 100 code in my opinion will be sufficient for a beginner.
Thanks

Xcode is the IDE.
Objective-C is the language typically used.
There's lots of getting started stuff at https://developer.apple.com

How do I play an audio file in Xcode for Mac OS X?

I have been looking and looking, and I still can't find out how I can play a sound in Xcode. I have done it for the iPhone, but I'm trying to do it for Mac OS X. I am a beginner and so I am going to need some explaining as to what is going on. I just need to play a short sound (max of 10 seconds) when a timer goes off. Any help is very greatly appreciated (I have been trying to get this to work for WEEKS)! Thanks in advance.

https://developer.apple.com/mac/library/samplecode/PlayFile/Introduction/Intro.h tml
Docs are your friend....mac os has it's own just like iPhone.

Xcode and older Java projects

Help!
Recently I've tried to re-run some older Java Xcode projects and have received this error message:
"Jam is deprecated and has been removed; targets that use Jam must be upgraded to native targets. For more information on doing this, consult the Xcode documentation."
I can get around the problem by copying the old code into a newly created project; however, when I tried to follow the instruction in the error message and consult the Xcode documentation, I could find no information on how to do this. I have tried searching the user docs for all of the terms in the above message with no useful results. Selecting "Upgrade all targets to native" from the Project menu produces a warning that this is not supported in Java.
I must be missing something really obvious. Can anybody tell me what is going on?
Thanks, dcl

Thanks for the quick reply, Karl.
I should have mentioned that I'm pretty much a beginner with Xcode and Java (actually, with software in general). I get the impression that you don't think that Xcode is a very good way to develop Java. Why is that?
For my level of programming it works just fine (usually). If I start with a new project there is no problem; however, I can't go back and work on older projects because of the problem I mentioned in the original email.
Any clues as to what is going on?

Want to learn Xcode

I want to learn how to make apps for the iphone. I have some very basic programming knowledge so I'm definitely a beginner.
I have xcode on my macbook and I want to find a source to learn all the fundamentals for coding in xcode. Can somebody help me out?
Thanks!

I posted this a while back. I don't know if it was helpful or not. It is a tutorial on C programming written by the author of a very good book on Motif programming.
How C Programming Works
Since you are just starting, my advice is to stay out of Xcode, just for little bit. Go through some basic "HelloWorld" tutorials. Learn how the terminal works. Learn a little bit about the process of compiling a source file into an executable. Xcode is very good, but it hides a lot of what is going on underneath. I think you would be much more effective with Xcode if you knew a little about that hidden stuff.

IOS Xcode vs OS X Xcode

I'm a Mac newbie. I'd like to give Xcode a try. I've searched the 'net, but all that I've found is example code for iOS. Is Xcode for iOS identical to Xcode for OS X? Should I search the 'net for example code for Objective-C? Is Objective-C identical to Xcode? I'd like to get some books. Should I get beginner books for Objective-C or beginner books for Xcode or does it make any difference?
I have Mavericks on my Macbook Pro & Mountain Lion on my Mac mini. I've downloaded Xcode onto my laptop but not onto my mini.
Thanks.
David

macnerd48 wrote:
I'm a Mac newbie. I'd like to give Xcode a try. I've searched the 'net, but all that I've found is example code for iOS.
All? iOS is certainly popular but if you haven't found any OS X examples then you haven't searched very much of the net.
Is Xcode for iOS identical to Xcode for OS X?
Identical? No. There is the whole simulator thing. Interface Builder is different obviously. Xcode itself does both so it is more or less identical.
Should I search the 'net for example code for Objective-C? Is Objective-C identical to Xcode? I'd like to get some books. Should I get beginner books for Objective-C or beginner books for Xcode or does it make any difference?
It doesn't make any difference. Example code is really only useful for people who could write it themselves but find it more efficient to start with a template. If you don't know, then you need to learn first. Otherwise, when the example code fails as it does 75% of the time, you're stuck.

Xcode 4.2 Example runs once then stuck

I was having an issue, so I went back to a book example and found the same problem. I am trying to create a very simple NSDictionary application under Cocoa. At an early point I tried 'build and run' and it worked to bring up the screen I am constructing. However, when I stop that run, and then repeat build and run, it never shows the screen. It comes up with the following message and seems to be in a loop from there. The number seems to be an almost random number. I am sure it is a novice error, but it is stopping all progress! Any help would be appreciated.
tty /dev/ttys000
[Switching to process 4792 thread 0x0]

Thanks. The code is pretty short, so I am including it all. It really is beginner level. I am sure I just need an experienced eye to point out some mis-direction on my part. Thanks for any coaching I can get. I only wrote the first method and added a line to the init method. It has occurred to me that perhaps this has something to do with the upgrade from Xcode 3.x to Xcode 4.2. The book example I am following was written to Xcode 3. The book examples had similar errors with NSDictionary and NSArray examples.
Document.h
#import <Cocoa/Cocoa.h>
@interface Document : NSDocument
    NSMutableDictionary *mainDictionary;
    IBOutlet NSTextField *kRefInField;
    IBOutlet NSTextField *dataInField;
- (IBAction)storeRefAndData: (id)sender;
@end
Document.m
#import "Document.h"
@implementation Document
- (IBAction)storeRefAndData: (id)sender
    NSString *kRefToStore = [kRefInField stringValue];
    NSString *dataToStore = [dataInField stringValue];
    [mainDictionary setValue:dataToStore forKey:kRefToStore];
- (id)init
    self = [super init];
    if (self) {
        // Add your subclass-specific initialization here.
        // If an error occurs here, return nil.
        mainDictionary = [[NSMutableDictionary alloc] init];
    return self;
- (NSString *)windowNibName
    // Override returning the nib file name of the document
    // If you need to use a subclass of NSWindowController or if your document supports multiple NSWindowControllers, you should remove this method and override -makeWindowControllers instead.
    return @"Document";
- (void)windowControllerDidLoadNib:(NSWindowController *)aController
    [super windowControllerDidLoadNib:aController];
    // Add any code here that needs to be executed once the windowController has loaded the document's window.
- (NSData *)dataOfType:(NSString *)typeName error:(NSError **)outError
     Insert code here to write your document to data of the specified type. If outError != NULL, ensure that you create and set an appropriate error when returning nil.
    You can also choose to override -fileWrapperOfType:error:, -writeToURL:ofType:error:, or -writeToURL:ofType:forSaveOperation:originalContentsURL:error: instead.
    NSException *exception = [NSException exceptionWithName:@"UnimplementedMethod" reason:[NSString stringWithFormat:@"%@ is unimplemented", NSStringFromSelector(_cmd)]userInfo:nil];
    @throw exception;
    return nil;
- (BOOL)readFromData:(NSData *)data ofType:(NSString *)typeName error:(NSError **)outError
    Insert code here to read your document from the given data of the specified type. If outError != NULL, ensure that you create and set an appropriate error when returning NO.
    You can also choose to override -readFromFileWrapper:ofType:error: or -readFromURL:ofType:error: instead.
    If you override either of these, you should also override -isEntireFileLoaded to return NO if the contents are lazily loaded.
    NSException *exception = [NSException exceptionWithName:@"UnimplementedMethod" reason:[NSString stringWithFormat:@"%@ is unimplemented", NSStringFromSelector(_cmd)]userInfo:nil];
    @throw exception;
    return YES;
+ (BOOL)autosavesInPlace
    return YES;
@end
Re: [Switching to process 2576 thread 0x0]

How and where can I download Xcode 5.1.1 ?

I need to develop an appli but as a beginner on Xcode, I could find only tutorials corresponding to Xcode 5.1.1 but none devoted to 6.1.
This version is too recent.
So my question is "where is the link which allows to download version 5.1.1 of Xcode" ? How can I manage this ?
Thanks

Try Xcode 5.1.1. If that does not work you can go to View all downloads and search for Xcode. Note you will need a free developer account to access these links.
However I suggest you just get Xcode 6 and try that. While the differences might make using the tutorial more challenging if it is aimed at beginners it most likely will translate without to much trouble. Also keep in mind if you are planning on submitting apps to the Apple store at some pit you will need to be using the latest version of Xcode.
regards
If you do go with 6 you should get a free developer account anyway. There is a lot of good documentation at the View all downloads link that you will find useful.

I'm new in xcode, any application ideas for beginers?

I'm new in xcode, just downloaded it today, made a web browser but I want to learn how to make an application like the pros. I need some ideas to learn from, dose anyone have any??

Mujtaba has given you excellent advice. Though you haven't told us whether your interest is in OS X or iPhone apps, the iPhone Developer Beginner Resource Guide is full of good information, much of which applies to any Cocoa app. The links in that Guide are well chosen, and it might be worth your time to follow every one of them. Here's another post that might help get you started: [http://discussions.apple.com/thread.jspa?messageID=11099223&#11099223].
I would recommend building your first apps from the instructions in one of the good books recommended at the above links. Once you're ready to dig into the online Apple developer resources, you'll find pages listing all the free OS X and iPhone sample apps along with download links for each of them. Each of these samples is designed to show you how to use one or more features of an Apple platform. But the sample apps have a second important purpose: Each of them is intended to give you ideas for your own apps. In fact, you'll find many published apps based on these sample apps, some of them with very little customization.
In short, my suggestion is to get into the Apple sample apps as soon as you're ready for them. Before long you'll have more app ideas than time to build them.
Hope that helps!
\- Ray

Xcode 3.0 beginner

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