日志调试目标C代码时使用哪些日志记录解决方案？

Question

我目前在我的代码中的任何地方都使用NSLog来测试它，除了使用标准NSLog之外，还有更好更专业的方法吗？介意分享其他专业目标-C编码器在调试时用于记录日志的情况吗？

Answer 1

这是我的日志记录类。它只是NSLog周围的宏，但它允许你有可切换的级别。我从别人那里借来修改过这些东西，但不记得在哪里 - 我希望我能给道具。评论是一个很好的使用指南。希望能帮助到你。

/* 
* There are three levels of logging: debug, info and error, and each can be enabled independently 
* via the ENLOGGING_LEVEL_DEBUG, ENLOGGING_LEVEL_INFO, and ENLOGGING_LEVEL_ERROR switches below, respectively. 
* In addition, ALL logging can be enabled or disabled via the ENLOGGING_ENABLED switch below. 
* 
* To perform logging, use any of the following function calls in your code: 
* 
* ENDebug(fmt, …) – will print if ENLOGGING_LEVEL_DEBUG is set on. 
* ENInfo(fmt, …) – will print if ENLOGGING_LEVEL_INFO is set on. 
* ENHeading(fmt, …) – will print if ENLOGGING_LEVEL_INFO is set on. 
* ENError(fmt, …) – will print if ENLOGGING_LEVEL_ERROR is set on. 
* 
* Each logging entry can optionally automatically include class, method and line information by 
* enabling the ENLOGGING_INCLUDE_CODE_LOCATION switch. 
* 
* Logging functions are implemented here via macros, so disabling logging, either entirely, 
* or at a specific level, removes the corresponding log invocations from the compiled code, 
* thus completely eliminating both the memory and CPU overhead that the logging calls would add. 
*/ 

#define ENLOGGING_ENABLED 1 

// Set any or all of these switches to enable or disable logging at specific levels. 

#define ENLOGGING_LEVEL_DEBUG 1 
#define ENLOGGING_LEVEL_INFO 1 
#define ENLOGGING_LEVEL_ERROR 1 

// Set this switch to set whether or not to include class, method and line information in the log entries. 
#define ENLOGGING_INCLUDE_CODE_LOCATION 0 

////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 
// 
// Implementation 
// 
////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 
#if !(defined(ENLOGGING_ENABLED) && ENLOGGING_ENABLED) 
#undef ENLOGGING_LEVEL_DEBUG 
#undef ENLOGGING_LEVEL_INFO 
#undef ENLOGGING_LEVEL_ERROR 
#endif 

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

#if defined(ENLOGGING_INCLUDE_CODE_LOCATION) && ENLOGGING_INCLUDE_CODE_LOCATION 
#define ENLOG_FORMAT(fmt, lvl, ...) ENLOG_FORMAT_WITH_LOCATION(fmt, lvl, ##__VA_ARGS__) 
#else 
#define ENLOG_FORMAT(fmt, lvl, ...) ENLOG_FORMAT_NO_LOCATION(fmt, lvl, ##__VA_ARGS__) 
#endif 

// Debug level logging 

#if defined(ENLOGGING_LEVEL_DEBUG) && ENLOGGING_LEVEL_DEBUG 
#define ENDebug(fmt, ...) ENLOG_FORMAT(fmt, @"debug", ##__VA_ARGS__) 
#else 
#define ENDebug(...) 
#endif 

// Info level logging 

#if defined(ENLOGGING_LEVEL_INFO) && ENLOGGING_LEVEL_INFO 
#define ENInfo(fmt, ...) ENLOG_FORMAT(fmt, @"info", ##__VA_ARGS__) 
#define ENHeading(fmt, ...) ENLOG_FORMAT(@"#################### " fmt " ####################", @"HD", ##__VA_ARGS__) 
#else 
#define ENInfo(...) 
#define ENHeading(...) 
#endif 

// Error level logging 

#if defined(ENLOGGING_LEVEL_ERROR) && ENLOGGING_LEVEL_ERROR 
#define ENError(fmt, ...) ENLOG_FORMAT(fmt, @"***ERROR***", ##__VA_ARGS__) 
#else 
#define ENError(...) 
#endif 

#if defined(ENLOGGING_LEVEL_ERROR) && ENLOGGING_LEVEL_ERROR 
#define ENResult(result, error) if (result == NO) ENError("%@", error) 
#else 
#define ENResult(...) 
#endif 

Answer 2

我正在使用标准工具在Xcode中进行调试，例如，通过向某些行添加断点并在其停止时查看iVar的值。您还可以使用Instruments来测试性能和内存管理。