[Objective-c] Base64 String to NSData, NSData to Base64 String

// Base64String to NSData

NSString *str = @”SGVsbG8gV29ybGQ=”;

NSData *base64Data = [[NSData alloc] initWithBase64EncodedString:str options:0];

// NSData to Base64String

NSData *data = [base64Data base64EncodedDataWithOptions:0];

NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

// str : SGVsbG8gV29ybGQ=

NSLog(@”str : %@”, str);