nsdata

I am retrieving HTML, containing UTF8 or ASCII encoded text. For most common use it is ASCII decoding that works to display the text right: NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSASCIIStringEncoding]; Now I have another HTML page with UTF8 encoding, so I have to use: NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; What kind of encoding I retrieve is random when loading websites. My question is, is there a way to check the NSData for what kind of decoding is the right to use? So I know which

this is my code for getting a video from UIImagePickerController : - (IBAction)takeVideo:(UIButton *)sender { UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.allowsEditing = YES; picker.sourceType = UIImagePickerControllerSourceTypeCamera; picker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil]; [self presentViewController:picker animated:YES completion:NULL]; } - (void)viewDidAppear:(BOOL)animated { self.movieController = [[MPMoviePlayerController alloc] init]; self.movieController.controlStyle =

i have converted my .caf audio file to NSData object using the following line of code: NSData *audioData = [NSData dataWithContentsOfFile:[MyRecorderFilePathURL path] options: 0 error:&err]; I am doing so to upload the binary object to a server through a web service. How do i convert audioData back to a .caf file which can be played using AVAudioPlayer ? AVAudioPlayer has a method for playing sound from NSData object . You can use - (id)initWithData:(NSData *)data error:(NSError **)outError method of AVAudioPlayer 来源： https://stackoverflow.com/questions/9157916/converting-nsdata-back-to-audio

I want to use zlib because I'm assuming it's the best & fastest way to gzip NSData . But, is there a better way? If not, which version of the zlib library should I link to in Xcode: libz.dylib, libz.1.dylib, libz.1.1.3.dylib, or libz.1.2.5.dylib? Please provide a code example of how to us zlib to convert NSData *normalHTTPBody into NSData gzippedHTTPBody Yes, zlib is what is used to gzip data. I know of no better way. As for speed, you can select the compression level to optimize speed vs. compression for your application. You will likely find that libz.dylib and libz.1.dylib are symbolic

In order to upload an image file to my server, I need to get it's NSData. I am having trouble doing this right now, because my UIImage contains a CGImage. Let me show you how I am doing things. When a user takes a photo, this is what I do with the captured photo: NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer]; UIImage *image = [[UIImage alloc]initWithData:imageData]; _subLayer = [CALayer layer]; image = [self selfieCorrection:image]; image = [self rotate:image andOrientation:image.imageOrientation]; CGRect cropRectFinal = CGRectMake

I have the following function at the moment in my generic class func writeHeader(buffer: CMutableVoidPointer) { var headerData = NSData(bytesNoCopy:buffer, length:sizeof(H)) self.fileHandle.writeData(headerData) } But as you see this is not very type safe. I tried this but it does not compile func writeHeader(buffer: CMutablePointer<H>) { var headerData = NSData(bytesNoCopy:buffer, length:sizeof(H)) self.fileHandle.writeData(headerData) } Any idea? UPDATE This is part of a generic class as mentioned in the first sentence, sorry next time im more specific. class DataStore<H> { ..... } This

] 2 I am using AFNetworking to send data to server.Below is my code: AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; [manager setRequestSerializer:[AFJSONRequestSerializer serializer]]; [manager setResponseSerializer:[AFJSONResponseSerializer serializer]]; [manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"]; NSMutableDictionary *dict = [[NSMutableDictionary alloc]init]; [dict setValue:[[arrLoginDetails objectAtIndex:0] objectForKey:@"id"] forKey:@"user_id"]; [dict setValue:[[arrLoginDetails objectAtIndex:0] objectForKey: