cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   EmmaLynn
   Member

   Hello,

   I'm having trouble with the following code. Basically the code is meant to open the text file put the contents into a string then put the lines in a globally accessible array. I don't get any errors, I just get nothing. When I step through the code using the debugger filestring is nill even after the stringWithContentsOfFile method is called. I'm not even sure if this is the best way to put the contents of a file into an array, but it seems to make sense. perhaps not...

   // in header
   NSArray *wordlist; //declare array

   //in init method
   wordlist = [[NSArray alloc] init]; // init array

   // import word list from a file
   NSMutableString *fileString; // declare string
   fileString = [NSMutableString stringWithCapacity:0]; // init string
   [fileString retain]; // bump up retain count
   fileString = [NSMutableString stringWithContentsOfFile:@"wordlist.txt"]; // reads file into memory as an NSMutableString
   wordlist = [fileString componentsSeparatedByString:@"\n"]; // each line, adjust character for line endings
   [fileString release]; // release string

   Posted 2 years ago #
2. 

   Codemattic
   Moderator

   Unfortunately Cocoa/ObjectiveC memory management is too confusing compared to Java or scripting languages. In this code you have memory leaks - bc you are creating objects where you shouldnt. Yes, I know, last time I told you to create your objects before using them, but this is different. That time you were sending a message to an object, so it had to exist first. Here you are getting the object returned to you which is different.

   Check out the MoveMe example code from Apple:

   http://developer.apple.com/iphone/library/samplecode/MoveMe/index.html

   Look at the -init method of PlacardView.m. It loads some strings from a text file into an array:
   

   // Load the display strings
   NSString *path = [[NSBundle mainBundle] pathForResource:@"DisplayStrings" ofType:@"strings"];
   NSString *string = [NSString stringWithContentsOfFile:path encoding:NSUTF16BigEndianStringEncoding error:NULL];
   self.displayStrings = [string componentsSeparatedByString:@"\n"];

   Note that you cant just give the filename, you have to give the full path to the file. In cocos2d you may be used to creating Sprites by just giving the imagename, but that is bc behind the scenes cocos2d is figuring out the path for you.

   Posted 2 years ago #
3. 

   EmmaLynn
   Member

   Thanks again Codemattic, I'm sorry for all the questions. I'll take a look at this example and get this figured out. Memory management is very confusing! I'm going to figure this out though! :o)

   Posted 2 years ago #
4. 

   EmmaLynn
   Member

   That MoveMe example did the trick for me. I'm going to do some more looking through the apple example code. Your a huge help Codematic thanks allot!

   Posted 2 years ago #

RSS feed for this topic

Reply

You must log in to post.