如何打印出方法名称和行号并有条件地禁用NSLog? [英] How to print out the method name and line number and conditionally disable NSLog?
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问题描述
我有两个问题:
p>- 是否有方法可以轻松地NSLog当前方法的名称/行号?
- 在编译发布代码之前,是否可以轻松地禁用所有NSLog?
解决方案
NSLog的宏使用了很多:
#ifdef DEBUG
#define DLog(fmt,...)NSLog (...)($ @%s [Line%d]fmt),__PRETTY_FUNCTION__,__LINE__,## __ VA_ARGS__)
#else
#define DLog(...)
#endif
// ALog总是显示输出而不管调试设置
#define ALog(fmt,...)NSLog((@%s [Line%d]fmt),__PRETTY_FUNCTION__,__LINE__, DLOG宏仅用于在设置DEBUG变量时输出(-DDEBUG)(仅当设置了DEBUG变量时才会输出)
ALog将总是输出文本(如常规NSLog)。
输出(例如ALog(@Hello world))将如下所示:
- [LibraryController awakeFromNib] b $ b
I'm doing a presentation on debugging in Xcode and would like to get more information on using NSLog efficiently.
In particular, I have two questions:
- is there a way to easily NSLog the current method's name / line number?
- is there a way to "disable" all NSLogs easily before compiling for release code?
解决方案 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 used to only output when the DEBUG variable is set (-DDEBUG in the projects's C flags for the debug confirguration).
ALog will always output text (like the regular NSLog).
The output (e.g. ALog(@"Hello world") ) will look like this:
-[LibraryController awakeFromNib] [Line 364] Hello world
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