How do I create a hash of a file on iOS?

Question

I\'m trying to create unique file names by renaming them using their hashed value in iOS. How can I do that?

Answer 1

Why don't you simply generate unique identifiers and use it? like

CFUUIDRef uuidObj = CFUUIDCreate(nil);
NSString *uniqueId = (NSString*)CFUUIDCreateString(nil, uuidObj);
CFRelease(uuidObj);
NSLog(@"%@",uniqueId);
[uniqueId autorelease];