Preprocessor macros are indeed great for debugging. There’s nothing wrong with NSLog(), but it’s simple to define your own logging function with better functionality. Here’s the one I use, it includes the file name and line number to make it easier to track down log statements. #define DEBUG_MODE #ifdef DEBUG_MODE #define DebugLog( s, … ) … Read more
It is the description instance method, declared as: – (NSString *)description Here’s an example implementation (thanks to grahamparks): – (NSString *)description { return [NSString stringWithFormat: @”Photo: Name=%@ Author=%@”, name, author]; }
Here are some useful macros around NSLog I use a lot: #ifdef DEBUG # define DLog(fmt, …) NSLog((@”%s [Line %d] ” fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__) #else # define DLog(…) #endif // ALog always displays output regardless of the DEBUG setting #define ALog(fmt, …) NSLog((@”%s [Line %d] ” fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__) The DLog macro is … Read more