nsdictionary

I've read that the best way of creating an index (the a-z at the side of a uitableview) is to set up an array of nsdictionaries, where each dictionary corresponds to a section, and a rowValue key contains an array of the rows. NSDictionary headerTitle => ‘A’ rowValues => {”Aardvark”, “Ape”, “Aquaman”} NSDictionary headerTitle => ‘B’ rowValues => {”Bat”, “Boot”, “Bubbles”} etc But how can this be created from an array of all the row titles - {”Aardvark”, “Ape”, “Aquaman”, ”Bat”, “Boot”, “Bubbles”, "Cat", "Cabbage" etc} ...? #pragma mark - #pragma mark View lifecycle - (void)viewDidLoad { [super

If we have an API that requires only 2 out of an objects 5 properties and iPhone app doesn't require them to instantiate an object, when the object is used in the params NSDicitionary the app will crash. I was told NSDictionary will not let you assign nil values, as when it reaches nil it thinks its finished. Does objective-c have a way to spit out an objects non-nil properties into an NSDictionary? Example: [Drunk alloc] init]; drunk.started_drinking = [NSDate date]; drunk.stopped_drinking (we don't set this because he is still a drunk) drunk.fat = YES; drunk.dumb = YES; parameters:@{ @"auth

I have one NSDictionary and it loads up UITableView . If a user scrolls more and more, I call API and pull new data. This data is again in the form of an NSDictionary . Is it possible to add the new NSDictionary to the existing one? MGA You looking for this guy: [NSMutableDictionary addEntriesFromDictionary:] Make sure your UITableView dictionary is an NSMutableDictionary ! Check it here Use NSMutableDictionary addEntriesFromDictionary to add the two dictionaries to a new mutable dictionary. You can then create an NSDictionary from the mutable one, but it's not usually necessary to have a

I'm dealing with deeply nested NSArray's and NSDictionary's and it's very time consuming to say the least. [data objectatindex:0] valueForKey:@"blah"] etc etc Does anyone know of a nice iOS category to recursively log the structure, highlight the type and show the values? Might be asking a bit much but you never know :) Maybe like this? for (id key in dictionary) { NSLog(@"key: %@, value: %@ \n", key, [dictionary objectForKey:key]); } but i can't think of any nice way of getting the output beautiful except copy & paste it into a jsonFormatter (for example) EDIT : @Andrey Starodubtsev has the

I'm currently saving an NSDictionary to file on the iOS device. However, NSDictionary files are readable XML. I don't want people to be able to get in and read the contents so I need to be able to encrypt the file on writing and decrypt when loading it back again. I'm currently saving the file like this: NSFileManager* fileManager = [NSFileManager defaultManager]; if (!fileManager) { NSLog(@"Failed to get file manager to save."); return; } NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString* documentsDirectory = [paths objectAtIndex:0];

I have a feeling that this is stupid question, but I'll ask anyway... I have a collection of NSDictionary objects whose key/value pairs correspond to a custom class I've created, call it MyClass . Is there an easy or "best practice" method for me to basically do something like MyClass * instance = [ map NSDictionary properties to MyClass ]; ? I have a feeling I need to do something with NSCoding or NSKeyedUnarchiver , but rather than stumble through it on my own, I figure someone out there might be able to point me in the right direction. The -setValuesForKeysWithDictionary: method, along with