替代NSLog的几种方式

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//DLog will output like NSLog only when the DEBUG variable is set

#ifdef DEBUG

//# define NSLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)

//A better version of NSLog

#define NSLog(format, ...) do { \

fprintf(stderr, "<%s : %d> %s\n", \

[[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], \

__LINE__, __func__); \

(NSLog)((format), ##__VA_ARGS__); \

fprintf(stderr, "-------\n"); \

} while (0)

#else

# define NSLog(...)

#endif

//----------------------------------------------------

// ALog will always output like NSLog

#define ALog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);

// ULog will show the UIAlertView only when the DEBUG variable is set

#ifdef DEBUG

# define ULog(fmt, ...) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:[NSString stringWithFormat:@"%s\n [Line %d] ", __PRETTY_FUNCTION__, __LINE__] message:[NSString stringWithFormat:fmt, ##__VA_ARGS__] delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil]; [alert show]; }

#else

# define ULog(...)

#endif

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