我是一个新手,试图在2008年更新一个免费软件应用程序,然后(显然)被程序员放弃,他们没有回复我的电子邮件,并且都为当前的MacOS更新了它,并且还创建了一个版本.苹果手机.我想这将是一个漫长而有点噩梦的过程,但我很期待学习.
现在我处于开始阶段,我正在查看原始的以下GeniusPair.h文件：
#import <Foundation/Foundation.h>
@class GeniusItem;
@class GeniusAssociation;
extern const int kGeniusPairDisabledImportance;
extern const int kGeniusPairMinimumImportance;
extern const int kGeniusPairNormalImportance;
extern const int kGeniusPairMaximumImportance;
@interface GeniusPair : NSObject <NSCoding,NSCopying> {
GeniusAssociation * _associationAB; //!< Stats for standard learning mode directional relationship.
GeniusAssociation * _associationBA; //!< Stats for Jepardy style learning mode directional relationship.
NSMutableDictionary * _userDict;
}
+ (NSArray *) associationsForPairs:(NSArray *)pairs useAB:(BOOL)useAB useBA:(BOOL)useBA;
- (id) initWithItemA:(GeniusItem *)itemA itemB:(GeniusItem *)itemB userDict:(NSMutableDictionary *)userDict;
//varIoUs other methods declared
@end
@interface GeniusPair (GeniusDocumentAdditions)
- (BOOL) disabled;
//varIoUs other methods declared
@end
@interface GeniusPair (TextImportExport)
- (NSString *) tabularTextByOrder:(NSArray *)keyPaths;
//varIoUs other methods declared
@end
我的问题是(问题是)：为什么.h文件中有多个接口？ @interface GeniusPair：NSObject和@interface GeniusPair(TextImportExport)有什么区别？什么让@interface后跟括号中的内容与@interface后跟冒号？
非常感谢您的帮助解释.
