How to use FILE * with iPhone

I have a file called "0.ballpoint" that all I want to do is store some coordinates with (don't really want to use Core Data because it seem a little excessive). I placed it in my project but when I try doing this:

if ( access("0.ballpoint", F_OK) != -1) {
    printf("file exists\n");
}
else {
    printf("doesn't exist\n");
}

It says it "doesn't exist". Do I need to put the ful开发者_如何学Cl path name? And if I do what do I do when I place it on the actual iPhone/iPod Touch?

CoreData is not meant for File access. There are other file API's available for iPhone. Please go through NSFileManager and NSStream documentation.

For example, if your intention is to check if file exists at certain path,you may use (add your file to resources)

NSString *filePath =  [[NSBundle mainBundle] pathForResource: @"0" ofType: @"ballpoint"];
BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:filePath];

Prefer not to use low level stuff (C File handles) unless you have a valid reason to do so. Paths are to be carefully chosen (as you cant make assumptions on certain path, which might cease to exist in future).

Having said that, if you prefer to work with C file handling ,

NSString *filePath =  [[NSBundle mainBundle] pathForResource: @"0" ofType: @"ballpoint"];
FILE *fileHandle = fopen([filePath cStringUsingEncoding:NSASCIIStringEncoding],"r");

it needs to become a resource to your Application that way the file can be pulled anytime during the use of your application.

Im not too well educated in Ipod Dev, im more of a windows phone 7 developer but i know it cant access it if it is still on your computer so you need to import it into your application some how and call it with the full file path name.