You could try subclassing UIAlertView to add the field, or store a reference in your delegate class instead. But the most general way to attach any object to any other object is to use objc_setAssociatedObject. To do so, you have to #import <objc/runtime.h>, and you need an arbitrary void * that is used as a … Read more
The native Swift way is to use PropertyListSerialization if let url = Bundle.main.url(forResource:”Config”, withExtension: “plist”) { do { let data = try Data(contentsOf:url) let swiftDictionary = try PropertyListSerialization.propertyList(from: data, format: nil) as! [String:Any] // do something with the dictionary } catch { print(error) } } You can also use NSDictionary(contentsOf: with a type cast: if … Read more
The quotes appear because the string contains something besides basic alphanumerics — in this case, an underscore. It’s the same reason “tbyg.jpg” and “6bcb4126-4bbe-4b3d-be45-9a06cf56a22f” have quotes (they contain a dot and dashes, respectively). That’s just how the description method works. It wouldn’t cause your second log to fail.
NSArray *contacts = …; //your array of NSDictionary objects NSPredicate *filter = [NSPredicate predicateWithFormat:@”contact_type = 42″]; NSArray *filteredContacts = [contacts filteredArrayUsingPredicate:filter]; After this, filteredContacts will contain only the contacts whose contact_type is 42. If you need to search for more than one kind of contact_type, then simply use an OR in the predicate: filter = … Read more
NSDictionary is a class cluster (see the “Class Cluster” section in The Cocoa Fundamentals Guide), meaning that the actual implementation is hidden from you, the API user. In fact, the Foundation framework will choose the appropriate implementation at run time based on amount of data etc. In addition, NSDictionary can take any id as a … Read more
Try this magic: NSDictionary *dict = [NSDictionary dictionaryWithObjects:records forKeys:[records valueForKey:@”intField”]]; FYI this is possible because of this built-in feature: @interface NSArray(NSKeyValueCoding) /* Return an array containing the results of invoking -valueForKey: on each of the receiver’s elements. The returned array will contain NSNull elements for each instance of -valueForKey: returning nil. */ – (id)valueForKey:(NSString *)key;
I believe you are misinterpreting the JSON format for key values. You should store your string as NSString *jsonString = @”{\”ID\”:{\”Content\”:268,\”type\”:\”text\”},\”ContractTemplateID\”:{\”Content\”:65,\”type\”:\”text\”}}”; NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding]; id json = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil]; Now if you do following NSLog statement NSLog(@”%@”,[json objectForKey:@”ID”]); Result would be another NSDictionary. { Content = 268; type = text; }
NSDictionary -> NSData: NSData *myData = [NSKeyedArchiver archivedDataWithRootObject:myDictionary]; NSData -> NSDictionary: NSDictionary *myDictionary = (NSDictionary*) [NSKeyedUnarchiver unarchiveObjectWithData:myData];
A small modification to the method can make it recursive: @interface NSDictionary (JRAdditions) – (NSDictionary *) dictionaryByReplacingNullsWithStrings; @end @implementation NSDictionary (JRAdditions) – (NSDictionary *) dictionaryByReplacingNullsWithStrings { const NSMutableDictionary *replaced = [NSMutableDictionary dictionaryWithDictionary: self]; const id nul = [NSNull null]; const NSString *blank = @””; for (NSString *key in self) { const id object = [self … Read more
If you absolutely must use a dictionary container, you have to use a key that is sortable by the order in which you add key-value pairs. Thus, when creating your dictionary, you use a key that is an auto-incrementing integer or similar. You can then sort on the (integer) keys and retrieve the values associated … Read more