Objective c NSMutableDictionary问题

假设我有一个有两个NSMUTABLE字典的类

@interface GameDataManager : CCNode {

    NSMutableDictionary *worldInfoDictionary;
    NSMutableDictionary *levelInfoDictionary;
}

@property (nonatomic, retain) NSMutableDictionary *worldInfoDictionary;
@property (nonatomic, retain) NSMutableDictionary *levelInfoDictionary;

当应用程序启动时，我从plist加载数据，如下所示：

-(BOOL) readApplicationData:(NSString *)fileName
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *appFile = [documentsDirectory stringByAppendingPathComponent:fileName];
    NSData *myData = [[[NSData alloc] initWithContentsOfFile:appFile] autorelease];

    if (myData == nil) {

       return NO;
    }

    NSKeyedUnarchiver *un = [[NSKeyedUnarchiver alloc] initForReadingWithData:myData];
    NSMutableDictionary *dic = [un decodeObjectForKey:@"GameData"];

    self.worldInfoDictionary = [dic objectForKey:@"WorldInfoDictionary"];
    self.levelInfoDictionary = [dic objectForKey:@"LevelInfoDictionary"];

for (int i = 1; i <= 10; i++) {

           WorldInfoData * w = [worldInfoDictionary objectForKey:
                             [[[NSString alloc] initWithFormat:@"World%d", i] autorelease]];
    NSLog(@"%d", w.worldNum);
    [w release];
}

    [un finishDecoding];
    [un release];
    return YES; 
}

NSMutableDictionary *dic = [GameDataManager sharedGameDataManager].worldInfoDictionary;
        for (int i = 1; i <= 10; i++) {

            NSString *key = [[NSString alloc] initWithFormat:@"World%d", i];    
            WorldInfoData *worldInfoData = [dic objectForKey:key];

            if (worldInfoData.worldNum == 1) {
                //......
            }
            [key release];
        }

我可以看出两个字典中的值/键的数量是正确的

然后我尝试打印出每个对象的所有“worldNum”值，但应用程序除外 crahed：

如果我取消对此行的注释：

[un release];

应用程序工作正常，没有崩溃

谁能给我解释一下，谢谢^_^

谢谢你的回答

但如果我删除了用于输出某些信息的代码行：

for (int i = 1; i <= 10; i++) {

           WorldInfoData * w = [worldInfoDictionary objectForKey:
                  [[[NSString alloc] initWithFormat:@"World%d", i] autorelease]];
    NSLog(@"%d", w.worldNum);
    [w release];
}

---

对于（inti=1；i首先，我建议在启用僵尸检测的情况下运行应用程序

您将发现一个通知，说明您正在过度删除“w”

WorldInfoData * w = [worldInfoDictionary objectForKey:
                         [[[NSString alloc] initWithFormat:@"World%d", i] autorelease]];
NSLog(@"%d", w.worldNum);
[w release];

将“w”添加到自动释放池中，然后显式地调用release；line将修复您的问题或不向自动释放池中添加“w”。
finishDecoding函数中有什么？这是NSKeyEdunachiver的函数…几乎…被显式自动释放的东西是键。但是
w
在它不是此代码所拥有的对象时被释放。
NSMutableDictionary *dic = [GameDataManager sharedGameDataManager].worldInfoDictionary;
        for (int i = 1; i <= 10; i++) {

            NSString *key = [[NSString alloc] initWithFormat:@"World%d", i];    
            WorldInfoData *worldInfoData = [dic objectForKey:key];

            if (worldInfoData.worldNum == 1) {
                //......
            }
            [key release];
        }

WorldInfoData * w = [worldInfoDictionary objectForKey:
                         [[[NSString alloc] initWithFormat:@"World%d", i] autorelease]];
NSLog(@"%d", w.worldNum);
[w release];