Hi,
I have the following test program:
#import <Foundation/Foundation.h>
@interface MyClass: NSObject
@end
@interface MySubClass: MyClass
@end
@implementation MyClass
+(void)initialize
{
[self setVersion: 1];
}
@end
@implementation MySubClass
+(void)initialize
{
[self setVersion: 8];
}
-(id) init
{
self = [super init];
NSLog(@"SuperClass class_getVersion([super class]): %i",
class_getVersion([super class]));
NSLog(@"SuperClass class_getVersion([MyClass class]): %i",
class_getVersion([MyClass class]));
NSLog(@"SuperClass [[super class] version]: %i", [[super class] version]);
NSLog(@"SubClass class_getVersion([self class]): %i", class_getVersion([self
class]));
NSLog(@"SubClass class_getVersion([MySubClass class]): %i",
class_getVersion([MySubClass class]));
NSLog(@"SubClass [[self class] version]: %i", [[self class] version]);
return self;
}
@end
int
main(int argc, const char *argv[])
{
id pool = [[NSAutoreleasePool alloc] init];
MySubClass *my = [[MySubClass alloc] init];
[pool release];
return 0;
}
which gives me the following output:
2012-09-13 11:47:30.072 TestTool[27335] SuperClass class_getVersion([super
class]): 8
2012-09-13 11:47:30.081 TestTool[27335] SuperClass class_getVersion([MyClass
class]): 1
2012-09-13 11:47:30.081 TestTool[27335] SuperClass [[super class] version]: 8
2012-09-13 11:47:30.081 TestTool[27335] SubClass class_getVersion([self
class]): 8
2012-09-13 11:47:30.081 TestTool[27335] SubClass class_getVersion([MySubClass
class]): 8
2012-09-13 11:47:30.081 TestTool[27335] SubClass [[self class] version]: 8
What I wonder is why line 1 and line 3 returns 8 instead of 1.
I guess there must be a simple solution, but I was looking into NSObject.m but
did not found
yet, why I only get the 1 in the 2nd line.
If somebody could explain that, or has a pointer to documentation where to read
up,
that would be helpful.
thanks,
Sebastian
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