564NSData to NSString and vice versa

From NSData to NSString: 
NSString *s = [[NSString alloc] initWithData:d encoding:NSUTF8StringEncoding];
And the other way round: 
NSData *d = [s dataUsingEncoding:NSUTF8StringEncoding]:
565Stripping Characters from an NSString
484Printing Selectors in NSLog
452Padding with Zeros (or other characters)
383String By Appending Path Component
381Zero-Padding in Objective-C
376Variable length of accuracy of float in NSString
347UIImage → pixelData → UIImage Rountrip