nsdictionary

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; [manager GET:@"http://example.com/resources.json" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) { NSLog(@"JSON: %@", responseObject); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"Error: %@", error); }]; this is the recommended way to send GET request in AFNetworking 2.0. I want to get the value of a specific key in the json, so I want to use responseObject as NSDictionary . this is what I was trying: NSError *jsonError = nil; NSDictionary *json =

basically I have an NSDictionary with keys and values. The keys are all numbers, but at the moment they are strings. I want to be able to compare them as numbers in order to sort them. eg: If I have a Dictionary like this: { "100" => (id)object, "20" => (id)object, "10" => (id)object, "1000" => (id)object, } I want to be able to sort it like this: { "10" => (id)object, "20" => (id)object, "100" => (id)object, "1000" => (id)object, } Any ideas? Thanks Tom Not sure what you are up to – dictionaries are inherently unsorted, there is no stable key ordering in the default implementation. If you

Can we get the key for an object in an NSDictionary by passing a particular value or object? -[NSDictionary allKeysForObject:] returns an NSArray of all the keys whose objects match the passed object, where "match" is determined by isEqual: . To answer you question in a more specific manner, use the following to get a key for a particular object: NSString *knownObject = @"the object"; NSArray *temp = [dict allKeysForObject:knownObject]; NSString *key = [temp lastObject]; //"key" is now equal to the key of the object you were looking for wzbozon This is how you can get a first key for object

how can I check if this exists?: [[dataArray objectAtIndex:indexPathSet.row] valueForKey:@"SetEntries"] I want to know whether this key exists or not. How can I do that? Thank you very much :) EDIT: dataArray has Objects in it. And these objects are NSDictionaries. John Parker I presume that [dataArray objectAtIndex:indexPathSet.row] is returning an NSDictionary , in which case you can simply check the result of valueForKey against nil. For example: if ([[dataArray objectAtIndex:indexPathSet.row] valueForKey:@"SetEntries"] != nil) { // The key existed... } else { // No joy... } Miles Alden So

I am trying to pass data to labels from my JSON file onto a simple ViewController but I don't know where to actually pass that data. Would I be able to just add to my setDataToJson method or would I add the data in my viewDidLoad method? here is my code @interface NSDictionary(JSONCategories) +(NSDictionary*)dictionaryWithContentsOfJSONString:(NSString*)fileLocation; @end @implementation NSDictionary(JSONCategories) +(NSDictionary*)dictionaryWithContentsOfJSONString:(NSString*)fileLocation{ NSData* data = [NSData dataWithContentsOfFile:fileLocation]; __autoreleasing NSError* error = nil; id

How can I store a UIImage in an NSDictionary? Yes you can: NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithCapacity:1]; UIImage *img = ...; [dict setObject:img forKey:@"aKeyForYourImage"]; UIImage *imgAgain = [dict objectForKey:@"aKeyForYourImage"]; RyanTCB OK I had this problem recently and the above solutions never worked for me. So if someone else finds their way here to solve the same problem, here is how it's done NSDictionary *imageDictionary = @{ kImageKey: UIImageJPEGRepresentation(/*INSERT YOUR UIImage HERE*/,0.1) }; // the 0.1 represents the compression quality 0.0

I have a custom class, which is a subclass of NSManagedObject . I would like to store it in a dictionary, but when trying to do so I receive a Property list invalid for format: 200 error. Here is how I try to create the dictionary: NSDictionary *dictionary = [NSDictionary dictionaryWithObject: voiceMemo forKey:@"voiceMemo"]; Same result when trying NSDictionary *dictionary = [NSDictionary dictionaryWithObject: (NSData *) voiceMemo forKey:@"voiceMemo"]; It works, however, when trying to save the individual attributes separately: NSDictionary *dictionary = [NSDictionary dictionaryWithObject: