iphone - xml解析期间出现内存泄漏问题？

我遇到了奇怪的内存泄漏问题，

现在我的代码是

-(NSMutableDictionary *)getParsedWallpaperData{
NSMutableDictionary *dataDictionary = [NSMutableDictionary dictionary];

NSData *xmlData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Wallpaper" ofType:@"xml"]];
TBXML *tbXml = [[TBXML alloc] initWithXMLData:xmlData error:nil];

//TBXML *tbXml = [[TBXML tbxmlWithXMLData:xmlData error:nil] autorelease];

@synchronized(self){
    TBXMLElement *rootXMLElement = tbXml.rootXMLElement;

    if(rootXMLElement)
    {
        TBXMLElement *paging = [TBXML childElementNamed:kPaging parentElement:rootXMLElement];
        NSMutableDictionary *pagingData = [[NSMutableDictionary alloc] init];
        if(paging){
            TBXMLElement *totalPages = [TBXML childElementNamed:kTotalPages parentElement:paging];
            NSString *totalPagesString = [TBXML textForElement:totalPages];
            [pagingData setObject:totalPagesString forKey:@"TotalPages"];

            TBXMLElement *currentPage = [TBXML childElementNamed:kCurrentPage parentElement:paging];
            NSString *currentPageString = [TBXML textForElement:currentPage];
            [pagingData setObject:currentPageString forKey:@"CurrentPage"];

            TBXMLElement *prevPage = [TBXML childElementNamed:kPerviousPage parentElement:paging];
            NSString *prevPageString = [TBXML textForElement:prevPage];
            [pagingData setObject:prevPageString forKey:@"PreviousPage"];

            TBXMLElement *nextPage = [TBXML childElementNamed:kNextPage parentElement:paging];
            NSString *nextPageString = [TBXML textForElement:nextPage];
            [pagingData setObject:nextPageString forKey:@"NextPage"];
        }
        [dataDictionary setObject:pagingData forKey:@"PagingInfo"];
        [pagingData release];
        pagingData = nil;

        TBXMLElement *totalItems = [TBXML childElementNamed:kTotalItems parentElement:rootXMLElement];
        NSString *totalItemsString = [TBXML textForElement:totalItems];
        [dataDictionary setObject:totalItemsString forKey:@"TotalItems"];

        NSMutableArray *itemArray = [[NSMutableArray alloc] initWithCapacity:[totalItemsString intValue]];

        TBXMLElement *items = [TBXML childElementNamed:kItems parentElement:rootXMLElement];
        if(items){
            TBXMLElement *item = [TBXML childElementNamed:kItem parentElement:items];
            while (item) {
                NSMutableDictionary *itemInfoDict = [[NSMutableDictionary alloc] init];
                TBXMLElement *title = [TBXML childElementNamed:kTitle parentElement:item];
                NSString *titleString = [TBXML textForElement:title];
                [itemInfoDict setObject:titleString forKey:@"Title"];

                TBXMLElement *image1 = [TBXML childElementNamed:kImage1 parentElement:item];
                NSString *image1String = [TBXML textForElement:image1];
                [itemInfoDict setObject:image1String forKey:@"Image1"];

                TBXMLElement *image2 = [TBXML childElementNamed:kImage2 parentElement:item];
                NSString *image2String = [TBXML textForElement:image2];
                [itemInfoDict setObject:image2String forKey:@"Image2"];

                TBXMLElement *image3 = [TBXML childElementNamed:kImage3 parentElement:item];
                NSString *image3String = [TBXML textForElement:image3];
                [itemInfoDict setObject:image3String forKey:@"Image3"];

                TBXMLElement *thumbnail = [TBXML childElementNamed:kThumbnail parentElement:item];
                NSString *thumbnailString = [TBXML textForElement:thumbnail];
                [itemInfoDict setObject:thumbnailString forKey:@"Thumbnail"];

                [itemArray addObject:itemInfoDict];
                [itemInfoDict release];
                itemInfoDict = nil;
                item = item -> nextSibling;
            }
        }
        [dataDictionary setObject:itemArray forKey:@"ImagesInfo"];
        [itemArray release];
        itemArray = nil;
    }
}

[tbXml release];
tbXml = nil;
return dataDictionary;
 }

我发现只有内存泄漏TBXML * tbXml = [[TBXML alloc] initWithXMLData：xmlData错误：无]；在这一行上，即使我手动释放了tbXml对象，

请建议我y这件事发生了吗？

谢谢，

最佳答案

好吧，如果它是显示为泄漏的根元素，我想知道是否是像childElementNamed这样的访问器之一引起了它（通过返回类似NSString的行为，但实际上还优化了指针存储回根元件）。您可以看一下childElementNamed的实现吗？更改代码以确保不是这样的一种相对较快的方法是，使用dataDictionary调用将要存储在[NSString stringWithFormat:@"%@", [TBXML textForElement:fooTitle]]中的所有NSString结果包装。

此外，如果TBXML正在创建许多自动发布的对象，则可以将此函数包装在@nsautoreleasepool宏中。

作为最后的建议，如果可以的话（例如，如果要部署到iOS 4+），应该查看ARC。