How to read bytes from NSData

Question

Can anyone suggest a method to read bytes from NSData (like read function in @interface NSInputStream : NSStream)

Answer 1

How to read binary bytes in NSData? may help you:

NSString *path = @"…put the path to your file here…";
NSData * fileData = [NSData dataWithContentsOfFile: path];
const char* fileBytes = (const char*)[fileData bytes];
NSUInteger length = [fileData length];
NSUInteger index;

for (index = 0; index<length; index++) {
   char aByte = fileBytes[index];
   //Do something with each byte
}

Answer 2

You can also create an NSInputStream from an NSData object, if you need the read interface:

NSData *data = ...;
NSInputStream *readData = [[NSInputStream alloc] initWithData:data];
[readData open];

However, you should be aware that initWithData copies the contents of data.