My iPhone Game Tutorials for Beginners

[GMG Kurt]

in the 'other languages and tools' section of the forums I found the post 'Cocca (objective-C)' I looked through it and found the link you put there for 'Become An Xcoder' and it was extremely helpful.

[Gan]

Yeah it is. That's the one that really pushed me into serious Obj-C programming.

Literally read the whole thing.

[GMG Kurt]

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int x = 5, y = 12, ratio; ratio =y / x;

it said that ratio would be 2 instead of 2.4 does the compiler estimate, or does it just plain drop the factions? Also can a block of code like this exist? Also I thought variables had to be predefined in .h files and executed in .m files?

[Gan]

Integers are whole numbers. If you set an integer to a fraction of a number, it rounds to the nearest whole number.
Yes you can have clumped stuff like that.

Variables that you want to use anywhere in the .m file must be declared in the .h. Though you can declare local variables in the .m file. They just won't be global.

[GMG Kurt]

OOHHH that makes total sense. Thanks. What do you do to get a random number picker. I'm trying to make a dice roller to get acquainted with code Object-C from 'scratch'

[Gan]

Loading

Code: [Select]

/* initialize random seed: */
 Â srand ( time(NULL) );

Anywhere Else

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//Get a random number, can be 0,1,2,3 or 4
int randomNumber = rand()%5;

[GMG Kurt]

what does the line

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 srand ( time(NULL) ) ;

what does that do? The individual parts. The way I've learn things is taking them apart from the inside. Is time(NULL) a main() function. Also what happens to the variables inside the parenthesis, ie. NULL
And how do you program an IF THEN statement.

[GMG Kurt]

Also what coding languages can you use in Object-C and howdy you incorporate them into your game. And how do you see the internal structures of main() function        thingys

[GMG Kurt]

also what the heck does void mean?

[Gan]

what does that do? The individual parts. The way I've learn things is taking them apart from the inside. Is time(NULL) a main() function. Also what happens to the variables inside the parenthesis, ie. NULL  

time() is a C function. time(null) gets the number of seconds since Jan 1 1970.
NULL means nothing. So you give the function nothing.

And how do you program an IF THEN statement.

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int test = (rand()%2)+1;
if (test == 1) {
 Â   //Do Stuff
} else if (test == 2) {
 Â   //Do Stuff
}

Also what coding languages can you use in Object-C and howdy you incorporate them into your game. And how do you see the internal structures of main() function   thingys

You can use C and C++ with Objective-C. To find functions, either Google or search the Xcode documentation.

also what the heck does void mean?

Void means that the function returns nothing.

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- (void)stuff {
 Â  //stuff
}
- (void)awakeFromNib {
 Â   [self stuff];
}

If you want the function to return something you can do:

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- (int)stuff {
 Â  //stuff
 Â  return 5;
}
- (void)awakeFromNib {
 Â   int testNum = [self stuff];
}

[GMG Kurt]

I get it, cool. While reading how to become an Xcoder (I'm on chapter 8 ) It sounds like you have to keep gaining different functions to create programs. Where would be the best place to find a list of all the really useful & most commonly used functions for Beginner, intermediate, and Experience Xcoders.

[GMG Kurt]

Also what the heck is a argument. The document keeps referring to it, and I'm not quite sure what it is.

[GMG Kurt]

I get it, cool. While reading how to become an Xcoder (I'm on chapter 8 ) It sounds like you have to keep gaining different functions to create programs. Where would be the best place to find a list of all the really useful & most commonly used functions for Beginner, intermediate, and Experience Xcoders.

never mind I just read the part on documentation, and found most of what I was looking for.

[Gan]

Also what the heck is a argument. The document keeps referring to it, and I'm not quite sure what it is.

The argument is the variable you're putting in the function.

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int myVar = 5;
[self doStuff: myVar];

myVar is the argument cause you're putting it in a function so the function can use it.

[breshi]

 
I also have written what I think is a great game using your template. I was all set to release it but then the new operating system came out and slowed it right down so it is now unplayable.
I've reduce the loop time but still it is way too slow.
Any suggestions?