Xcode for OSX 10.6.8

I'm converting an existing VBasic programme into Objective-C. I bought a second-hand Mac Mini to do this. I also got a book on Objective-C. I have absolutely no experience with Macs. The book tells me I need Xcode and SDK. I tried to download the latest version of Xcode from the App Store but couldn't, I was told that my operating system isn't suitable. My Mac Mini is using OSX Version 10.6.8, which I think is Snow Leopard. Please can someone tell me what I must do? My ultimate aim is to make my programme available for use on iPads (at the moment it can only be used on PCs). Is there perhaps an earlier version of Xcode that would be suitable? Or will I need to upgrade Snow Leopard somehow? What a start to the new year ... I was expecting all sorts of difficulties re-writing the program but I never thought getting started would be this hard!
Hope you'll be able to help,
Brian

Thanks etresoft. I think I now see things clearly. I am a Yorkdhireman and we are supposed to have deep pockets and short arms. We also have determination and good common sense. I wrote the original programme as a novice about 7 years ago. It involves the control system that a diabetic on insulin needs to follow in order to stand any chance of enjoying life and living long. It works a treat on PCs and without it I doubt I'd still be alive. Anyway, enough of that. My son Jont said "why don't you turn it into an app?" i said do you think I'm mad? It took me 2 years writing it in a new language - Visual Basic - and i'll be buggered if I'm going to go through all that again using Objective - C when I don't know the first thing about OOP. And he said I should look for a cheap Mac on eBay. So I did. I was told on a forum that all I needed was an Intel one so I got one and it came about a week ago. What a fool I seem to have been. I'll meet you more than halfway and tell you that it seems to have been created in September 2006 and it's got 2GB of RAM. So that seems to rule out Mountain Lion. As VikingOSX said, it could be upgraded to Lion and (just about) do the job. And as you say, I should just crack on and make some progress. But do I really want to be bothered I wonder. Although the market area for the app is vast, a large percentage of the human race is diabetic and needs this software, most of them don't understand its importance and so don't know that they need it. So I'm inclined to ignore the Apple slippery and constantly steep slope and back out right now. I know how hard it will be to come to terms with Objective-C instead of VBasic and .NET. And although I'm a determined Yorkshireman who relishes a challenge I don't like banging my head against a wall. So, thanks again etresoft, VikingOSX and everyone else who has tried to help, but I feel it's time for me to back out.
All the best and Happy New Year,
Brian

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Dear all,
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- (void)initializeBricks
brickTypes[0] = @"bricktype1.png";
brickTypes[1] = @"bricktype2.png";
brickTypes[2] = @"bricktype3.png";
brickTypes[3] = @"bricktype4.png";
int count = 0;`
for (int y = 0; y < BRICKS_HEIGHT; y++)
for (int x = 0; x < BRICKS_WIDTH; x++)
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- Line5 bricks[x][y].frame = newFrame;
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2) How does the following in Line 1 work? Does it assign the element (name of .png) of brickType to image?
brickTypes[count ++ % 4]
For instance, returns one of the file name bricktype1.png to the image object? If true, what is the max value of "count", ends at 5? (as X increments 5 times for each Y). But then "count" will exceed the max 'index value' of brickTypes which is 3!
3) In Line2, does the image object which is being allocated has a name and linked with the .png already at this line *before* it is assigned to brick[x][y]?
4) What do Line3 and Line5 do? Why newFrame on left in line3 but appears on right in Line5?
5) What does Line 4 do?
Thanks
North

Hi North -
macbie wrote:
1) When it is compiled, error "ImageCache undeclared" in Line 1. ...
UIImage *image = [ImageCache loadImage:brickTypes[count++ % 4]]; // Line 1
The compiler is telling you it doesn't know what ImageCache refers to. Is ImageCache the name of a custom class? In that case you may have omitted #import "ImageCache.h". Else if ImageCache refers to an instance of some class, where is that declaration made? I can't tell you how to code the missing piece(s) because I can't guess the answers to these questions.
Btw, if the png file images were already the correct size, it looks like you could substitute this for Line 1:
UIImage *image = [UIImage imageNamed:brickTypes[count++ % 4]]; // Line 1
2) How does the following in Line 1 work? Does it assign the element (name of .png) of brickType to image?
brickTypes[count ++ % 4]
Though you don't show the declaration of brickTypes, it appears to be a "C" array of NSString object pointers. Thus brickTypes[0] is the first string, and brickTypes[3] is the last string.
The expression (count++ % 4) does two things. Firstly, the trailing ++ operator means the variable 'count' will be incremented as soon as the current expression is evaluated. Thus 'count' is zero (its initial value) the first time through the inner loop, its value is one the second time, and two the third time. The following two code blocks do exactly the same thing::
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NSString *filename = brickTypes[index++];
int index = 0;
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index = index + 1;
The percent sign is the "modulus operator" so x%4 means "x modulo 4", which evaluates to the remainder after x is divided by 4. If x starts at 0, and is incremented once everytime through a loop, we'll get the following sequence of values for x%4: 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, ...
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3) In Line2, does the image object which is being allocated has a name and linked with the .png already at this line *before* it is assigned to brick[x][y]?
Line 2 allocs an object of type UIImageView and specifies the data at 'image' as the picture to be displayed by the new object. Since we immediately assign the address of the new UIImageView object to an element of the 'bricks' array, that address isn't stored in any named variable.
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- Ray

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do you have multiple partitions on your USB stick? And what partition table does it use?
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Protective MBR: Bootcamp utility and OSX are not used since they would convert the disk to a hybrid MBR. This mode is compatible with booting in EFI mode. EFI compatible Windows versions (7 partially, 8 completely) will live alongside OS X, for the most without problems. And will install on a GPT type disk.
Hope to have helped you with this. Took me three full days of non-stop reading to figure this out.
Message was edited by: Jognt
Edit 2: Make damned sure you have a backup of your system. Messing around with partition types and tables shouldnt hurt when you know what you're doing. But since I know this for three days, and you apparently havent found this yet, I think it's safe to say both of us aren't yet 100% sure of what we're doing .
Message was edited by: Jognt

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