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我想用我自己的对象作为键将东西保存到 NSMutableDictionary

为此，我为我的对象实现了 NSCopying 协议，以及它昨晚使用的所有元素，它确实保存了对象，今天早上，当我运行完全相同的代码时，它不再保存它了。

这是为什么 ？

这些是我的 NSCopying 方法：

    - (id)copyWithZone:(NSZone *)zone{
    Player *player = [[[self class]allocWithZone:zone]init];
    if(player){
    player->name = [name copyWithZone:zone];
    player->deck = [deck copyWithZone:zone];
    }
    return player;
}
-(id)copy{
    Player *player = [[[self class]alloc]init];
    if(player){
    player->name = [name copy];
    player->deck = [deck copy];
    }
    return player;
}

 -(BOOL)isEqual:(id)object{
    if(![object isKindOfClass:[Player class]]){
        return NO;
    }
    Player *player = (Player *)object;
    return [self.name isEqualToString:[player name]];
}

   -(id)copyWithZone:(NSZone *)zone{
    DeckOfCards *deckOfCards = [[[self class]allocWithZone:zone]init];
    if(deckOfCards){
    deckOfCards->deck = [deck copyWithZone:zone];
    }
    return deckOfCards;
}
-(id)copy{
    DeckOfCards *deckOfCards = [[[self class]alloc]init];
    if(deckOfCards){
    deckOfCards->deck = [deck copy];
    }
    return deckOfCards;
}

这就是我想使用对象的方式：在 viewDidLoad

CGPoint  player1CardOrigin = CGPointMake(20, 160);
CGPoint  player2CardOrigin = CGPointMake(180, 160);

[origins setObject:[NSValue valueWithCGPoint:player1CardOrigin] forKey:player1];
[origins setObject:[NSValue valueWithCGPoint:player2CardOrigin] forKey:player2];

代码后面的某个地方

Player *player = [game playerToMove];
CGPoint origin = [[origins objectForKey:player]CGPointValue];

此时，origin已经再次为0,0，而不是正确的值

我不明白的是，为什么昨天它有效，而今天却没有？我究竟做错了什么 ？

进一步检查表明：

- (IBAction)click:(id)sender {
    Player *player1 = [Player playerWithName:[self getNameFromTextField:tfPlayer1]];
    Player *player2 = [Player playerWithName:[NSString stringWithFormat:@"%@ ",[self getNameFromTextField:tfPlayer2]]];
    NSMutableDictionary *dict = [[NSMutableDictionary alloc]init];
    [dict setObject:@"player1" forKey:player1];
    [dict setObject:@"player2" forKey:player2];
    NSLog(@"dict: %@",dict);
}

多次单击所述按钮，产生以下输出：

2013-06-29 10:06:10.165 CardWarGame[3109:c07] dict: {
    "2 \n(0)" = (null);
    "1\n(0)" = player1;
}
2013-06-29 10:06:13.612 CardWarGame[3109:c07] dict: {
    "1\n(0)" = player1;
    "2 \n(0)" = player2;
}
2013-06-29 10:06:19.407 CardWarGame[3109:c07] dict: {
    "1\n(0)" = player1;
    "2 \n(0)" = player2;
}
2013-06-29 10:06:20.798 CardWarGame[3109:c07] dict: {
    "1\n(0)" = player1;
    "2 \n(0)" = (null);
}
2013-06-29 10:06:21.780 CardWarGame[3109:c07] dict: {
    "2 \n(0)" = (null);
    "1\n(0)" = player1;
}
2013-06-29 10:06:22.620 CardWarGame[3109:c07] dict: {
    "2 \n(0)" = player2;
    "1\n(0)" = player1;
}
2013-06-29 10:06:23.402 CardWarGame[3109:c07] dict: {
    "2 \n(0)" = (null);
    "1\n(0)" = player1;
}

在我看来，有时它无法保存给定键的对象......？我该怎么做才能解决它，请帮忙

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1 回答 1

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我也应该忽略这种方法：

-(NSUInteger)hash{
    NSLog(@"player hash");
    return [[self name]hash];
}

然后它每次都有效

于 2013-06-29T07:46:34.353 回答