问题描述
我的代码中有一堆NSLog语句。无论如何,我可以禁止他们在生产中执行,但在我开发时执行?我不想评论它们,并且在开发时将它们放回去,因为它很麻烦。
I got a bunch of NSLog statements in my code. Is there anyway I can suppress them from executing in production, but execute when I'm developing? I want to not comment them out, and them put them back in when developing, as it's a hassle.
推荐答案
DEBUG
是一个仅定义的宏(xcode默认值)当您正在进行项目的调试/开发构建时。执行<$ c时,这将导致 #ifdef DEBUG
和 #endif
行之间的任何代码都不包括在内$ c> release build但它们将被编译并包含在 debug / dev / test 版本中。
DEBUG
is a macro that is only defined (xcode default) when you are doing a debug/development build of your project. This will cause any code between the #ifdef DEBUG
and #endif
lines to not be included when doing a release
build but they will be compiled and included with a debug/dev/test build.
示例:
#ifdef DEBUG
NSLog(@"Hello World!");
#endif
这就是我的意思在我的 Project-Prefix.pch
文件中使用(使用 DEBUGLOG(@abc%@,someStr)调用;
):
This is what I use in my Project-Prefix.pch
file (called with DEBUGLOG(@"abc %@", someStr);
):
#ifdef DEBUG
extern void DBGQuietLog(NSString *format, ...);
#define DEBUGLOG(fmt, ...) DBGQuietLog((@"[Line: %d] %s: " fmt), __LINE__, __FUNCTION__, ##__VA_ARGS__);
#else
#define DEBUGLOG(fmt, ...)
#endif
#ifdef DEBUG
void DBGQuietLog(NSString *format, ...) {
if (format == nil) {
printf("nil\n");
return;
}
va_list argList;
va_start(argList, format);
NSString *s = [[NSString alloc] initWithFormat:format arguments:argList];
printf("%s\n", [[s stringByReplacingOccurrencesOfString:@"%%" withString:@"%%%%"] UTF8String]);
[s release];
va_end(argList);
}
#endif
打印控制台线(仅在调试时)行号,类名和方法名如下:
This prints console lines (only when debugging) with line number, class name, and method name like so:
[Line: 36] -[iPhoneAppDelegate application:didFinishLaunchingWithOptions:]: Hello World!
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