Cocoa Maker 5 - File Management

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 <Foundation/Foundation.h> 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 <Foundation/Foundation.h> 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

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Cocoa Maker 5 - File Management is an episode from Cocoa Maker by Mr. Gecko.

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This episode was published on Mar 20, 2010.

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