nsdata

For various reasons I am intercepting http requests and loading content from files in my app's document directory using NSURLProtocol. Part of the process involves loading an NSData object, which could be anything from an html file to a jpeg image. NSURLProtocol requires setting a mimetype. Is there an API in the iPhone-SDK to determine the mimetype of the file or NSData content? Alexsander Akers Perhaps you could download the file and use this to get the file's MIME type. + (NSString*) mimeTypeForFileAtPath: (NSString *) path { if (![[NSFileManager defaultManager] fileExistsAtPath:path]) {

I have to convert an NSDictionary object into NSData and further I have to get the same NSDictionary out of the NSData object. How should I go about it? use NSKeyedArchiver To convert NSDictionary To NSData NSMutableData *data = [[NSMutableData alloc]init]; NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc]initForWritingWithMutableData:data]; [archiver encodeObject:YOURDICTIONARY forKey: YOURDATAKEY]; archiver finishEncoding]; [data writeToFile:YOURFILEPATH atomically:YES]; [data release]; [archiver release]; To get the NSDictionary back from the stored NSData NSData *data = [[NSMutableData

I have an iPhone app which encrypts an inputted NSString using CCCrypt (AES256) and a plaintext key. The string and key are given to the encryption method which returns an NSData object. Requesting [data description] where 'data' is the encrypted string data gives an NSString like: "<0b368353 a707e7de 3eee5992 ee69827e e3603dc2 b0dbbc0b 861ca87d f39ce72a>" but when I try to convert that to an NSString, I get "(null)". I need to return an NSString to the user, which can be used to decrypt back to the original string using the same plaintext key. If the 'description' property of the NSData

I'm trying to eliminate startup lag when playing a (very short -- less than 2 seconds) audio file via AVAudioPlayer on the iPhone. First, the code: NSString *audioFile = [NSString stringWithFormat:@"%@/%@.caf", [[NSBundle mainBundle] resourcePath], @"audiofile"]; NSData *audioData = [NSData dataWithContentsOfMappedFile:audioFile]; NSError *err; AVAudioPlayer *audioPlayer = [(AVAudioPlayer*)[AVAudioPlayer alloc] initWithData:audioData error:&err]; audioPlayer.delegate = self; [audioPlayer play]; I also implement the audioPlayerDidFinishPlaying method to release the AVAudioPlayer once I'm done.