Cocoa Maker 5 - File Management Cocoa Maker podcast

14+ y ago

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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; }

Keynote used in this Episode
Keynote in PDF Format

7 episodes

#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; }

#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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Cocoa Maker 5 - File Management