前言
例如，有一个Person类： #import #import “Book.h” @interface Person : NSObject @property(nonatomic,retain)NSString *name; @property(nonatomic,retain)Book *book; – (void)read; @end
#import “Person.h” @implementation Person – (void)dealloc { NSLog(@“人挂了。。。”): [_name release]; [_book release]; [super dealloc]; – (void)read { [_book castZhiShi]; NSLog(@“啊，书真好。。。”); } @end
还有一个Book类： #import @class Person; @interface Book : NSObject @property(nonatomic,retain)NSString *name; ///书的拥有者 @property(nonatomic,retain)Person *owner; ///传播知识的方法 – (void)castZhiShi; @end
#import “Book.h” #import “Person.h” @implem
