nsmutablearray

I'm a couple weeks into iOS programming, and have lots to learn. I've got a sort of an NSMutableArray containing MPMediaItems working, but it's about 10 seconds slow with a sort of 1200 items and I'm looking for an approach that would be faster. My ultimate goal is to have an array of MPMediaItemCollection items, each representing an album. I can't get this from an MPMediaQuery (as far as I know) because I need to get the songs from a playlist. So I'm sorting the songs I get from a specific playlist ("Last 4 months") and will then build my own array of collections. As I say, the approach below

I am looking for a way to compare the contents of two NSMutableArray objects. Both arrays are filled with NSMutableDictionaries which were allocated separately but occasionally contain the same data. Simplified Example: NSMutableArray *firstArray = [[NSMutableArray alloc] init]; NSMutableArray *secondArray = [[NSMutableArray alloc] init]; NSMutableDictionary *a = [[NSDictionary alloc] init]; [a setObject:@"foo" forKey:"name"]; [a setObject:[NSNumber numberWithInt:1] forKey:"number"]; NSMutableDictionary *b = [[NSDictionary alloc] init]; [b setObject:@"bar" forKey:"name"]; [b setObject:

I have a UINavigationController . I have to pop a view from a UINavigationController and replace it with another view. How we can search for a UIViewController object and replace it with another ? when i print NSMutableArray *allViewControllers = [NSMutableArray arrayWithArray: myDelegate.navigationController.viewControllers]; I tried.. [allViewControllers removeObjectIdenticalTo: @"NonLogginedViewController"]; [allViewControllers removeObjectIdenticalTo: myDelegate.nonLogginedViewController]; myDelegate.navigationController.viewControllers = allViewControllers; But it didn't update the

I'm making an iPhone app which displays information about red wines. The wines are stored in a plist containing an array of dictionaries. I'm adding a search view controller to the application, and to start up easy I want to get the wines who the value for the "Name" key contains nameString (from textbox). It kind of stops here, I need some advices about the most suitable way of doing this. Is there a function in the NSArray class which will do the job, should bring in NSPredicate, NSUserDefaults, or are there other options? I've done some research but I'm going to need some advices and maybe

I got annoying question... What if I have many image , and I want load it in to a table view And show the file name as cell's text , and the preview image is also show in the cell. When I select the cell , it will push to next view , show the big size image. That's it . I don't know how to load many folder to an array? /*********** EDIT ***********/ This is the folder I set many images inside You can see that's only one root folder ... And this is my code to load the image inside NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *filePath = [[NSBundle mainBundle]

We have an app that calls a SOAP web service and retrieves a long list of XML, which the app then parses into an NSArray of NSDictionary objects. The NSArray contains a list of Rental Apartment information, each of which is stored into an NSDictionary . The entire list may contain 10 different types of Apartments (i.e. 2-room, 3-room), and we need to split the NSArray into smaller NSArray s based on Room-Type, which has the key "roomType" in the NSDictionary objects. Currently our algorithm is Use [NSArray valueForKeyPath:@"@distinctUnionofObjects.room-type"] to obtain a list of unique room