Question

我正在研究我的第一款iPhone游戏的“最后润色”。出于某种原因，当我使用NSKeyedArchiver / Unarchiver保存时，数据似乎加载一次然后丢失或其他东西。

我正在尝试使用相同的归档程序保存2个对象：NSMutableDictionary levelsPlist和NSMutableArray categoryLockStateArray。设置为非原子，保留头文件中的属性。

以下是我能够推断的内容：

保存为NSMutableDictionary的对象始终存在。它运作得很好。
当我在此viewController中保存，弹出到上一个，然后推送回到这个，数据被保存并打印出我想要的它来。

但是当我保存在这个viewController中，然后推送一个新的并且弹出回到这个中时，categoryLockState就会丢失。

< / LI>

知道为什么会这样吗？我有这个设置错了吗？几个月前我从一本书中复制了它。这是我用来保存和加载的方法。

    - (void) saveGameData {
        NSLog(@"LS:saveGameData");

        // SAVE DATA IMMEDIATELY
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *gameStatePath = [documentsDirectory stringByAppendingPathComponent:@"gameState.dat"];
        NSMutableData *gameSave= [NSMutableData data];
        NSKeyedArchiver *encoder = [[NSKeyedArchiver alloc] initForWritingWithMutableData:gameSave];
        [encoder encodeObject:self.categoryLockStateArray forKey:@"categoryLockStateArray];
        [encoder encodeObject:self.levelsPlist forKey:@"levelsPlist"];

        [encoder finishEncoding];
        [gameSave writeToFile:gameStatePath atomically:YES];

        NSLog(@"encoded catLockState:%@",categoryLockStateArray);
    }

- (void) loadGameData {
    NSLog(@"loadGameData");

    // If there is a saved file, perform the load
    NSMutableData *gameData = [NSData dataWithContentsOfFile:[[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"gameState.dat"]];

    // LOAD GAME DATA
    if (gameData) {
        NSLog(@"-Loaded Game Data-");
        NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:gameData];
        self.levelsPlist = [unarchiver decodeObjectForKey:@"levelsPlist"];
        categoryLockStateArray = [unarchiver decodeObjectForKey:@"categoryLockStateArray"];

        NSLog(@"decoded catLockState:%@",categoryLockStateArray);
    }

    // CREATE GAME DATA
    else {
        NSLog(@"-Created Game Data-");
        self.levelsPlist = [[NSMutableDictionary alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:kLevelsPlist ofType:@"plist"]];
    }

    if (!categoryLockStateArray) {
        NSLog(@"-Created categoryLockStateArray-");

        categoryLockStateArray = [[NSMutableArray alloc] initWithCapacity:[[self.levelsPlist allKeys] count]];

        for (int i=0; i<[[self.levelsPlist allKeys] count]; i++) {
            [categoryLockStateArray insertObject:[NSNumber numberWithBool:FALSE] atIndex:i];
        }
    }

    // set the properties of the categories
    self.categoryNames = [self.levelsPlist allKeys];
    NUM_CATEGORIES = [self.categoryNames count];
    thisCatCopy = [[NSMutableDictionary alloc] initWithDictionary:[[levelsPlist objectForKey:[self.categoryNames objectAtIndex:pageControl.currentPage]] mutableCopy]];
    NUM_FINISHED = [[thisCatCopy objectForKey:kNumLevelsBeatenInCategory] intValue];
}

我只能猜测它与viewController在弹出然后重新插入时被卸载和重新加载的事实有关，但是我的viewDidLoad代码没有提到这些变量中的任何一个。它们是从viewDidAppear方法调用的。

感谢您提供的任何帮助！

为什么我的iOS数据不能与NSKeyedArchiver持久存在？

0 个答案: