xcode 如何获取类和运行时信息？
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How to get class and runtime information?
提问by Jake
For debugging purposes, I'd like to display as much class information as I can, and possibly runtime information (which thread does the class/function run in, etc) into the console.
出于调试目的，我想在控制台中显示尽可能多的类信息，以及可能的运行时信息（类/函数在哪个线程中运行等）。
Is there an easy way to do this with a function, variable or even (external) framework?
有没有一种简单的方法可以使用函数、变量甚至（外部）框架来做到这一点？
P.S: I'm using Cocoa Touch.
PS：我正在使用 Cocoa Touch。
回答by amattn
in a class, if you overload the -(NSString *)descriptionmethod, you can easily log class info with NSLog(@"%@", some_object);
在一个类中，如果您重载该-(NSString *)description方法，您可以轻松地记录类信息NSLog(@"%@", some_object);
here's a fictitious example:
这是一个虚构的例子：
-(NSString *)description
{
return [NSString stringWithFormat:@"%@, %@, %d",
[super description],
class.object_ivar,
class.int_ivar];
}
You can use standard C macros to get things like name, file, line number etc... use the NSThread classes to get information about what thread the method is being called on.
您可以使用标准 C 宏来获取名称、文件、行号等内容……使用 NSThread 类获取有关调用该方法的线程的信息。
I posted this one to twitter. http://twitter.com/kailoa/status/1349928820Feel free to follow me if you are interested in more tidbits like this. I try to put them up regularly.
我把这个贴到推特上。 http://twitter.com/kailoa/status/1349928820如果您对更多这样的花絮感兴趣，请随时关注我。我试着定期把它们放好。
#define METHOD_LOG (NSLog(@"%@ %s\n%@", NSStringFromSelector(_cmd), __FILE__, self))
