所以我有2个对象。copyWithZone被称为
Library.h:
NSString *name;
Book *book;
Book.h:
NSString *title
NSString *author;
的属性都设置为(读写,拷贝)
ViewController.h:
Library *library;
Book *book;
ViewController.m:
library = [[Library alloc] init];
book = [[Book alloc]init];
//The fallowing all works
library.name = @"Library Name";
book.title = @"book Title";
book.author = @"book author";
//The fallowing crashes my app
library.book = book;
我怎样才能封装图书库对象的内部?
调试器给我一个下面的错误。
[库copyWithZone:]:无法识别选择
这表示感谢。 – endy 2010-12-04 00:59:17