Technology
James (MrGeckosMedia.com), joined by, Eduardo (MegaEduX.com), and John (@ZimiPoder), shows how Dictionaries, Arrays and Property Lists works in Cocoa.12:40Example code from episode.#import int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; NSLog(@"Array"); NSArray *array = [NSArray arrayWithObjects:@"Orange", @"Apple", @"Banana", nil]; for (int i=0; i<[array count]; i++) { NSLog(@"%@", [array objectAtIndex:i]); } NSLog(@"Sorting Array"); array = [array sortedArrayUsingSelector:@selector(compare:)]; for (int i=0; i<[array count]; i++) { NSLog(@"%@", [array objectAtIndex:i]); } NSLog(@"Saving Property List"); [array writeToFile:[@"~/Desktop/array.plist" stringByExpandingTildeInPath] atomically:YES]; NSLog(@"Mutable Array"); NSMutableArray *mutableArray = [NSMutableArray array]; [mutableArray addObject:@"Apples"]; [mutableArray addObject:@"Oranges"]; [mutableArray addObject:@"Bananas"]; for (int i=0; i<[mutableArray count]; i++) { NSLog(@"%@", [mutableArray objectAtIndex:i]); } NSLog(@"Removing object Oranges"); [mutableArray removeObjectAtIndex:1]; for (int i=0; i<[mutableArray count]; i++) { NSLog(@"%@", [mutableArray objectAtIndex:i]); } NSLog(@"Dictionary"); NSDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys:@"Oranges", @"Name", @"Fruit", @"Type", [NSNumber numberWithBool:YES], @"Seeds", nil]; NSLog(@"Adding %@ with name %@", [dictionary objectForKey:@"Type"], [dictionary objectForKey:@"Name"]); [mutableArray insertObject:dictionary atIndex:1]; for (int i=0; i<[mutableArray count]; i++) { NSLog(@"%@", [mutableArray objectAtIndex:i]); } NSLog(@"Saving Property List using NSPropertyListSerialization"); NSData *xmlData = [NSPropertyListSerialization dataFromPropertyList:mutableArray format:NSPropertyListXMLFormat_v1_0 errorDescription:nil]; [xmlData writeToFile:[@"~/Desktop/mutableArray.plist" stringByExpandingTildeInPath] atomically:YES]; NSLog(@"Mutable Dictionary"); NSMutableDictionary *mutableDictionary = [NSMutableDictionary dictionary]; [mutableDictionary setObject:@"Salad" forKey:@"Name"]; [mutableDictionary setObject:@"Veggie" forKey:@"Type"]; [mutableDictionary setObject:[NSDate date] forKey:@"Time"]; [mutableDictionary setObject:[NSNumber numberWithBool:NO] forKey:@"Seeds"]; NSLog(@"Adding %@ with name %@", [mutableDictionary objectForKey:@"Type"], [mutableDictionary objectForKey:@"Name"]); [mutableArray insertObject:mutableDictionary atIndex:0]; for (int i=0; i<[mutableArray count]; i++) { NSLog(@"%@", [mutableArray objectAtIndex:i]); } NSLog(@"Saving Binary Property List"); NSData *binaryData = [NSPropertyListSerialization dataFromPropertyList:mutableArray format:NSPropertyListBinaryFormat_v1_0 errorDescription:nil]; [binaryData writeToFile:[@"~/Desktop/bina ry.plist" stringByExpandingTildeInPath] atomically:YES]; [pool drain]; return 0;}Keynote used in this EpisodeKeynote in PDF Format