nsdictionary

I have a dictionary of arrays that is causing __NSCFDictionary objectAtIndex: errors. Can someone tell me why? The dictionary clearly has at least 1 array at the time of the error. NSError *error; responseString = [[NSString alloc] initWithData:self.responseData2 encoding:NSUTF8StringEncoding]; /* response string contains this: {"words": { "word": {"rowsreturned":0,"id":"-1","date":"","word":"","term":"","definition":"","updated_on":""} }, "status":"", "rowsreturned":"" } */ NSDictionary *json = [NSJSONSerialization JSONObjectWithData:self.responseData2 options:kNilOptions error:&error];

I'd like to create a JSON array of objects from the resultsArray. NSMutableArray *resultsArray = [NSMutableArray array]; FMResultSet *resultsSet = [database executeQuery:queryString]; while ([resultsSet next]) { [resultsArray addObject:[resultsSet resultDictionary]]; } For clarification, I'm using FMDB to query a database. I'm then storing the resulting objects within the resultsArray. From here I want to convert that results array into a JSON array of objects. Andrew You can use NSJSONSerialization class to create a JSON file from your dictionary using the class method NSData * JSONData =

I have the following code fragment: NSString* value = @"value"; NSString* key = @"key"; NSMutableDictionary* foo = [NSMutableDictionary dictionary]; NSDictionary* bar = [NSDictionary dictionary]; NSAssert([bar isKindOfClass: [NSMutableDictionary class]], @""); // passes the assert as both are NSCFDictionary; NSAssert([bar respondsToSelector: @selector(setValue:forKey:)], @""); // passes the assert because it NSCFDictionary does respond to the selector [foo setValue:value forKey:key]; // no problem, foo is mutable [bar setValue:value forKey:key]; // crash So if I have an object which is either

I am listing out a quantity percentage like stuff for an item via a webservice.The response that I get is an array of dictionaries similar to the below code.I need it in a sorted format NSArray *numberArray = [NSArray arrayWithObjects: [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithFloat:-12.0], @"price", nil], [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithFloat:-86.0],@"price", nil], [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithFloat:-8.0],@"price", nil], [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithFloat:12.0],@"price", nil

I wrote the Objective-C code first NSMutableString *aStrValue = [NSMutableString stringWithString:@"Hello"]; NSMutableDictionary *aMutDict = [NSMutableDictionary dictionary]; [aMutDict setObject:aStrValue forKey:@"name"]; NSLog(@"Before %@",aMutDict); [aStrValue appendString:@" World"]; NSLog(@"After %@",aMutDict); I got the output as follows 2015-09-17 14:27:21.052 ShareIt[4946:129853] Before { name = Hello; } 2015-09-17 14:27:21.057 ShareIt[4946:129853] After { name = "Hello World"; } Means when I append a string to a Mutable string which is actually referred into a MutableDictionary, the