objective-c - 奇怪的内存管理事件iOS

Question

由于下面的代码中的某些原因，replies数组是正确的NSLogging描述，但是comment.replies数组是NSLogging空。

我立即认为这是由于代码中的内存管理问题引起的，但我不认为那是真的。

请您告诉我为什么会这样吗？

- (TBComment *) dictionaryToComment:(NSDictionary *)dict {
    TBComment *comment = [[TBComment alloc] init];
    [comment setBody:[dict objectForKey:@"body"]];
    [comment setCommentID:[dict objectForKey:@"id"]];
    [comment setCreated_at:[dict objectForKey:@"created_at"]];
    [comment setUpdated_at:[dict objectForKey:@"updated_at"]];
    [comment setUser:[self dictionaryToUser:[dict objectForKey:@"user"]]];
    NSMutableArray *replies = nil;
    if ([[dict allKeys] containsObject:@"replies"]) {
        replies = [[NSMutableArray alloc] init];
        for (NSDictionary *reply in [dict objectForKey:@"replies"]) {
            NSLog(@"in");
            [replies addObject:[self dictionaryToComment:reply]];
        }
    }
    if (replies != nil) {
        [comment setReplies:replies];
        NSLog(@"COMMENT REPLIES = %@", comment.replies);
        NSLog(@"REPLIES = %@", replies);
        [replies release];
    }
    return [comment autorelease];
}

控制台->

2011-11-30 21:25:14.980 Timbrr[2379:f803] in
2011-11-30 21:25:14.980 Timbrr[2379:f803] COMMENT REPLIES = (null)
2011-11-30 21:25:14.980 Timbrr[2379:f803] REPLIES = (
    "<TBComment: 0x68dbeb0>"
)


- (void) setReplies:(NSArray *)_replies {
    hasReplies = (_replies == nil ? NO : ([_replies count] == 0 ? NO : YES));
    //replies is synthesised
}

Answer 1

我会怀疑comment是nil(尽管这需要nil中的显式TBComment -returning代码，这是可能的，但不常见)，或者-replies或-setReplies:的实现不正确。您是否有针对这些的自定义实现？

您的setReplies:实现永远不会设置_replies。