nsdata

This might be an amateur question, but although I have searched Stack Overflow extensibly, I haven't been able to get an answer for my specific problem. I was successful in creating a GIF file from an array of images by following a Github example: func createGIF(with images: [NSImage], name: NSURL, loopCount: Int = 0, frameDelay: Double) { let destinationURL = name let destinationGIF = CGImageDestinationCreateWithURL(destinationURL, kUTTypeGIF, images.count, nil)! // This dictionary controls the delay between frames // If you don't specify this, CGImage will apply a default delay let

How do you convert CMSampleBufferRef to NSData? I've managed to get the data for an MPMediaItem by following Erik Aigner's answer on this thread , however the data is of type CMSampleBufferRef . I know CMSampleBufferRef is a struct and is defined in the CMSampleBuffer Reference in the iOS Dev Library, but I don't think I fully understand what it is. None of the CMSampleBuffer functions seem to be an obvious solution. Daniel Here you go this works for audio sample buffer which is what you are looking at, and if you want to look at the whole process (getting all audio data from MPMediaItem into

Does -dataWithContentsOfURL: of NSData work in a background thread? Michael Kessler No, it doesn't. In order to get data from URL asynchronously you should use the NSURLRequest and NSURLConnection approach. You will have to implement the NSURLConnectionDelegate methods: -(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response; -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data; -(void)connectionDidFinishLoading:(NSURLConnection *)connection; -(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error; I'm

This code doesn't working with Swift 3 anymore. imageData = NSData(base64EncodedString: mediaFile, options: NSDataBase64DecodingOptions.fromRaw(0)!) So is this one. imageData = NSData(base64EncodedString: mediaFile, options: .allZeros) Instead of using NSData use directly Swift 3 native Data . if let decodedData = Data(base64Encoded: mediaFile, options: .ignoreUnknownCharacters) { let image = UIImage(data: decodedData) } Swift 4.1 : Sometimes string has prefix data:image/png;base64 will make base64Encoded return nil , for this situation: extension String { func base64ToImage() -> UIImage? { if

The solution of this question no longer works with Swift 3. There is no longer a property bytes of Data (formerly NSData . let data = dataToWrite.first! self.outputStream.write(&data, maxLength: data.count) With this code, I get the error: Cannot convert value of type 'Data' to expected argument type 'UInt8' How can you write Data to an NSOutputStream in Swift 3? NSData had a bytes property to access the bytes. The new Data value type in Swift 3 has a withUnsafeBytes() method instead, which calls a closure with a pointer to the bytes. So this is how you write Data to an NSOutputStream (without

I get my PDF from SQLite DB into a NSData variable. Now what are my options to create CGPDFDocumentRef from this NSData? Or what are my options anyway to create this CGPDFDocumentRef, have the data in SQLite? viggio24 You can create a PDF document using this function: CGPDFDocumentRef CGPDFDocumentCreateWithProvider ( CGDataProviderRef provider ); To create the provider you can use this function: CGDataProviderRef CGDataProviderCreateWithCFData ( CFDataRef data ); and consider that NSData and CFDataRef are toll-free bridged so you can use them interchangeably. So summarizing try this: NSData