nsarray

Is there a way construct a predicate to filter by class type? I currently loop through the array and check to the class of each object. Maybe there is a cleaner way? You could add a category to NSObject that adds a "cf_className" method, like so: @interface NSObject (CFAdditions) - (NSString *) cf_className; @end @implementation NSObject (CFAdditions) - (NSString *) cf_className { return NSStringFromClass([self class]); } @end From there, you can use predicates like: NSPredicate * p = [NSPredicate predicateWithFormat:@"cf_className = %@", aClass]; NSArray * filtered = [anArray

I have been searching for some sample code on how to store an NSArray in Core Data for awhile now, but haven't had any luck. Would anyone mind pointing me to some tutorial or example, or better yet write a simple sample as an answer to this question? I have read this but it doesn't show an example of how to go about implementing a transformable attribute that is an NSArray . Thanks in advance! Resh32 If you really need to do it, then encode as data. I simply created a new filed called receive as NSData (Binary data). Then in the NSManagedObject implementation: -(void)setReceiveList:(NSArray*

I have a UItableview with reordable rows and the data is in an NSarray. So how do I move an object in the NSMutablearray when the appropriate tableview delegate is called? Another way to ask this is how to reorder an NSMutableArray? id object = [[[self.array objectAtIndex:index] retain] autorelease]; [self.array removeObjectAtIndex:index]; [self.array insertObject:object atIndex:newIndex]; That's all. Taking care of the retain count is important, since the array might be the only one referencing the object. ARC compliant category: NSMutableArray+Convenience.h @interface NSMutableArray

I've looked on SO for examples of using Key Value Observing with an NSArray (or NSMutableArray ) and apparently you need to use an NSArrayController (which unlike KVO I'm not familiar with), but I haven't found concrete examples of how to do this. Can anyone explain with some sample code? For instance, if I have a GameModel which represents its player names with an NSArray (playerNameArray) of NSStrings . I want to observe those strings (the view controller observes the model's data) to update various things in the view. How do I get notification that the player name array has changed? EDIT :

Is there any way to create a new NSString from a format string like @"xxx=%@, yyy=%@" and a NSArray of objects? In the NSSTring class there are many methods like: - (id)initWithFormat:(NSString *)format arguments:(va_list)argList - (id)initWithFormat:(NSString *)format locale:(id)locale arguments:(va_list)argList + (id)stringWithFormat:(NSString *)format, ... but non of them takes a NSArray as an argument, and I cannot find a way to create a va_list from a NSArray... Peter N Lewis It is actually not hard to create a va_list from an NSArray. See Matt Gallagher's excellent article on the subject

I am having a problem regarding sorting an array w.r.t database: NSSortDescriptor *sorter = [[NSSortDescriptor alloc] initWithKey:@"w" ascending:YES]; NSArray *sortDescriptors = [NSArray arrayWithObject: sorter]; [mGlossaryArray sortUsingDescriptors:sortDescriptors]; [sorter release]; Here in database there are some first capital letters and because of that capital letter it does not show me proper sorted output. Here i am sorting an array with r.t "w" which is my table column in database. Here I have attach the screen shot for the output, which says that "Cancer" comes first than "c", but

I am creating an app for as existing website. They currently has the JSON in the following format : [ { "id": "value", "array": "[{\"id\" : \"value\"} , {\"id\" : \"value\"}]" }, { "id": "value", "array": "[{\"id\" : \"value\"},{\"id\" : \"value\"}]" } ] which they parse after escaping the \ character using Javascript. My problem is when i parse it in iOS using the following command : NSArray *result = [NSJSONSerialization JSONObjectWithData:jsonData options:kNilOptions error:&localError]; and do this : NSArray *Array = [result valueForKey:@"array"]; Instead of an Array I got NSMutableString