iPhone 序列号问题

Question

我需要将自己创建的类保存到文件中，我在互联网上发现，好的方法是使用 NSKeyedArchiver 和 NSKeyedUnarchiver我的类定义如下所示:

@interface Game : NSObject <NSCoding> {

    NSMutableString *strCompleteWord;
    NSMutableString *strWordToGuess;

    NSMutableArray *arGuessedLetters;    //This array stores characters
    NSMutableArray *arGuessedLettersPos;  //This array stores CGRects

    NSInteger iScore;
    NSInteger iLives;
    NSInteger iRocksFallen;

    BOOL bGameCompleted;
    BOOL bGameOver;
}

我已经这样实现了方法 initWithCoder: 和 encodeWithCoder::

- (id)initWithCoder:(NSCoder *)coder
    {   
        if([coder allowsKeyedCoding])
        {
            strCompleteWord = [[coder decodeObjectForKey:@"CompletedWord"] copy];
            strWordToGuess = [[coder decodeObjectForKey:@"WordToGuess"] copy];
            arGuessedLetters = [[coder decodeObjectForKey:@"GuessedLetters"] retain];
        //  arGuessedLettersPos = [[coder decodeObjectForKey:@"GuessedLettersPos"] retain];
            iScore = [coder decodeIntegerForKey:@"Score"];
            iLives = [coder decodeIntegerForKey:@"Lives"];
            iRocksFallen = [coder decodeIntegerForKey:@"RocksFallen"];
            bGameCompleted = [coder decodeBoolForKey:@"GameCompleted"];
            bGameOver = [coder decodeBoolForKey:@"GameOver"];
        }
        else
        {
            strCompleteWord = [[coder decodeObject] retain];
            strWordToGuess = [[coder decodeObject] retain];
            arGuessedLetters = [[coder decodeObject] retain];
        //  arGuessedLettersPos = [[coder decodeObject] retain];
            [coder decodeValueOfObjCType:@encode(NSInteger) at:&iScore];
            [coder decodeValueOfObjCType:@encode(NSInteger) at:&iLives];
            [coder decodeValueOfObjCType:@encode(NSInteger) at:&iRocksFallen];
            [coder decodeValueOfObjCType:@encode(BOOL) at:&bGameCompleted];
            [coder decodeValueOfObjCType:@encode(BOOL) at:&bGameOver];
        }

        return self;
    }

    - (void)encodeWithCoder:(NSCoder *)coder
    {
        if([coder allowsKeyedCoding])
        {
            [coder encodeObject:strCompleteWord forKey:@"CompleteWord"];
            [coder encodeObject:strWordToGuess forKey:@"WordToGuess"];
            [coder encodeObject:arGuessedLetters forKey:@"GuessedLetters"];
            //[coder encodeObject:arGuessedLettersPos forKey:@"GuessedLettersPos"];
            [coder encodeInteger:iScore forKey:@"Score"];
            [coder encodeInteger:iLives forKey:@"Lives"];
            [coder encodeInteger:iRocksFallen forKey:@"RocksFallen"];
            [coder encodeBool:bGameCompleted forKey:@"GameCompleted"];
            [coder encodeBool:bGameOver forKey:@"GameOver"];
        }
        else
        {
            [coder encodeObject:strCompleteWord];
            [coder encodeObject:strWordToGuess];
            [coder encodeObject:arGuessedLetters];
            //[coder encodeObject:arGuessedLettersPos];
            [coder encodeValueOfObjCType:@encode(NSInteger) at:&iScore];
            [coder encodeValueOfObjCType:@encode(NSInteger) at:&iLives];
            [coder encodeValueOfObjCType:@encode(NSInteger) at:&iRocksFallen];
            [coder encodeValueOfObjCType:@encode(BOOL) at:&bGameCompleted];
            [coder encodeValueOfObjCType:@encode(BOOL) at:&bGameOver];
        }
    }

我使用这些方法来归档和取消归档数据:

[NSKeyedArchiver archiveRootObject:currentGame toFile:strPath];
Game *currentGame = [NSKeyedUnarchiver unarchiveObjectWithFile:strPath];

我有两个问题。

1) 正如你所看到的，带有 arGuessedLettersPos 的行被注释了，这是因为每次我尝试编码这个数组时，都会出现错误(这个归档器无法编码结构)，并且使用了这个数组用于存储 CGRect 结构。我在互联网上看到了解决方案。问题是，数组中的每个 CGRect 都会转换为 NSString(使用 NSStringFromCGRect() )，然后保存。这是一个好方法吗？

2)这对我来说是个更大的问题。即使我注释掉这一行，然后成功运行代码，然后保存(存档)数据，然后尝试加载(取消存档)它们，也不会加载任何数据。没有任何错误，但 currentGame 对象没有应加载的数据。

您能给我一些建议吗？这是我第一次使用归档器和解归档器。

非常感谢您的每一个回复。

Answer 1

加载和保存的问题通过另一种方式解决了......

我没有实现 - (id)initWithCoder:(NSCoder )coder 和 - (void)encodeWithCoder:(NSCoder)coder 我使用了这个解决方案:

    NSMutableData *data = [NSMutableData alloc];
    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];

    [archiver encodeObject:self.strCompleteWord forKey:@"CompleteWord"];
    [archiver encodeObject:self.strWordToGuess forKey:@"WordToGuess"];
    [archiver encodeObject:self.arGuessedLetters forKey:@"GuessedLetters"];
    //[coder encodeObject:self.arGuessedLettersPos forKey:@"GuessedLettersPos"];
    [archiver encodeInteger:self.iScore forKey:@"Score"];
    [archiver encodeInteger:self.iLives forKey:@"Lives"];
    [archiver encodeInteger:self.iRocksFallen forKey:@"RocksFallen"];
    [archiver encodeBool:self.bGameCompleted forKey:@"GameCompleted"];
    [archiver encodeBool:self.bGameOver forKey:@"GameOver"];

    [archiver finishEncoding];

    [data writeToFile:strPath atomically:YES];

    [data release];

和

    NSMutableData *data = [[NSMutableData alloc] initWithContentsOfFile:strPath];
    NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];

    self.strCompleteWord = [[unarchiver decodeObjectForKey:@"CompletedWord"] copy];
    self.strWordToGuess = [[unarchiver decodeObjectForKey:@"WordToGuess"] copy];
    self.arGuessedLetters = [[unarchiver decodeObjectForKey:@"GuessedLetters"] retain];
    //self.arGuessedLettersPos = [[unarchiver decodeObjectForKey:@"GuessedLettersPos"] retain];     
    self.iScore = [unarchiver decodeIntegerForKey:@"Score"];
    self.iLives = [unarchiver decodeIntegerForKey:@"Lives"];
 self.iRocksFallen = [unarchiver decodeIntegerForKey:@"RocksFallen"];
   self.bGameCompleted = [unarchiver decodeBoolForKey:@"GameCompleted"];
    self.bGameOver = [unarchiver decodeBoolForKey:@"GameOver"];

    [unarchiver finishDecoding];
    [data release];

这完全没问题:)