クラス階層表示

クラス階層をstderrに表示する

void printClassHierarchy(id object)
{
    NSMutableArray *names = [NSMutableArray array];
    Class objClass = [object class];
    Class rootClass = [NSObject class];
    while(objClass != rootClass) {
	    [names addObject:NSStringFromClass(objClass)];
	    objClass = [objClass superclass];
    }
    [names addObject:NSStringFromClass(rootClass)];

    int i = 0;
    for(NSString *name in [names reverseObjectEnumerator]) {
	    fprintf(stderr, "%*s%s\n", i++ * 4, " ", [name UTF8String]); 
    }
}