James (MrGeckosMedia.com), joined by, Noah (RockntheSweater.com), and Karl, explains how file managing works in c and cocoa.

7:49

Example code from episode.

Files C Example

#import

BOOL file_exist(const char *fileName) {

FILE *file = fopen(fileName, "r");

if (file) {

fclose(file);

return YES;

}

return NO;

}

int main (int argc, const char * argv[]) {

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

const char *ourFile = [[@"~/Desktop/file.txt" stringByExpandingTildeInPath] UTF8String];

FILE *file;

if (!file_exist(ourFile)) {

file = fopen(ourFile, "w");

time_t currTime = time(NULL);

fprintf(file, "%s: We just made this file.\n", ctime(&currTime));

} else {

file = fopen(ourFile, "a");

}

time_t currTime = time(NULL);

fprintf(file, "%s: Here is a new line in this file.\n", ctime(&currTime));

fclose(file);

[pool drain];

return 0;

}

Files Cocoa Exmaple

#import

int main (int argc, const char * argv[]) {

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

NSFileManager *manager = [NSFileManager defaultManager];

NSString *ourFile = [@"~/Desktop/file.txt" stringByExpandingTildeInPath];

NSFileHandle *file;

if (![manager fileExistsAtPath:ourFile]) {

[manager createFileAtPath:ourFile contents:nil attributes:nil];

file = [NSFileHandle fileHandleForWritingAtPath:ourFile];

[file writeData:[[NSString stringWithFormat:@"%@: Here is a new file.\n", [NSDate date]] dataUsingEncoding:NSUTF8StringEncoding]];

} else {

file = [NSFileHandle fileHandleForWritingAtPath:ourFile];

[file seekToEndOfFile];

}

[file writeData:[[NSString stringWithFormat:@"%@: Here is a new line.\n", [NSDate date]] dataUsingEncoding:NSUTF8StringEncoding]];

[file closeFile];

[pool drain];

return 0;

}

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