Objective-C获取所有的类

all_class_in_objc.c

    int numClasses = 0;
	Class * classes = NULL;
	
	numClasses = objc_getClassList(NULL, 0);
	if (numClasses > 0 )
	{
		classes = malloc(sizeof(Class) * numClasses);
		numClasses = objc_getClassList(classes, numClasses);
		
		for (int i = 0; i < numClasses; i++)
		{
			Class cls = classes[i];
			NSLog(@"[%d]:%@", i, NSStringFromClass(cls));
		}
		
		free(classes);
	}