nsdata

I am implementing push notifications. I'd like to save my APNS Token as a String. - (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)newDeviceToken { NSString *tokenString = [NSString stringWithUTF8String:[newDeviceToken bytes]]; //[[NSString alloc]initWithData:newDeviceToken encoding:NSUTF8StringEncoding]; NSLog(@"%@", tokenString); NSLog(@"%@", newDeviceToken); } The first line of code prints null. the second prints the token. How can I get my newDeviceToken as an NSString? kulss use this : NSString * deviceTokenString = [[[

I'm implementing JSON Web Token authentication on the iOS (7) cient-side. It's working nicely. My app rceives tokens, and can make authenticated calls to my server with them. Now, I want my client side code to check for an expiration date on the token so it can know when to re-authenticate. Checking for the expiration date on a JWT auth token is straightforward. The authorization token is 3 base64 encoded JSON blobs, separated by a '.' - The expiration timestamp is in the middle blob, in a field called ext . It's seconds since unix epoch. So my code's looking like so: - (NSDate*)

I have a struct containing a struct and an NSObject that I want to serialize into an NSData object: struct Packet { var name: String var index: Int var numberOfPackets: Int var data: NSData } var thePacket = Packet(name: name, index: i, numberOfPackets: numberOfPackets, data: packetData) How do I best serialize the Packet into an NSData , and how do I best deserialize it? Using var bufferData = NSData(bytes: & thePacket, length: sizeof(Packet)) of only gives me the pointers of name and data. I was exploring NSKeyedArchiver , but then I'd have to make Packet an object, and I'd prefer to keep it

I have an NSData object of approximately 1000kB in size. Now I want to transfer this via Bluetooth. It would be better if I have, let's say, 10 objects of 100kB. It comes to mind that I should use the -subdataWithRange: method of NSData. I haven't really worked with NSRange. Well, I know how it works, but I can't figure out how to read from a given location with the length: 'to end of file'... I've no idea how to do that. Some code on how to split this into multiple 100kB NSData objects would really help me out here. (it probably involves the -length method to see how many objects should be

I have some NSData which is Base-64 encoded and I would like to decode it, I have seen an example that looks like this NSData* myPNGData = [xmlString dataUsingEncoding:NSUTF8StringEncoding]; [Base64 initialize]; NSData *data = [Base64 decode:img]; cell.image.image = [UIImage imageWithData:myPNGData]; However this gives me a load of errors, I would like to know what to do in order to get this to work. Is there some type of file I need to import into my project or do I have to include a framework? These are the errors I get Use of undeclared identifier 'Base64' Use of undeclared identifier