表視圖使用最後一個XML條目填充所有單元格iphone

Question

我試圖解析XML（這似乎是好的）並在Iphone上填充一個表視圖。我正在從蘋果siesmec的例子。 我的XML看起來是這樣的，有大約10項來自artist1要artist10

<promo> <id> 42 </id> <artistname> artist1 </artistname> <img> http://address.com/avatar_42.jpg </img> </promo>

如果我把斷點，我可以看到所有的正確名字，但是當解析完成所有10個細胞的我表說：「artist10：

了代號爲XML是文件作爲表視圖控制器中你能看見什麼那刺目一個愚蠢的錯誤

#pragma mark Parser constants 
    // Limit the number of parsed earthquakes to 50. 

static const const NSUInteger kMaximumNumberOfEarthquakesToParse = 50; 

static NSUInteger const kSizeOfEarthquakeBatch = 10; 

// Reduce potential parsing errors by using string constants declared in a single place. 
static NSString * const kArtistName = @"artistname"; 
static NSString * const kEntryElementName = @"promo"; 
static NSString *const kEntryElementID =@"id"; 
static NSString *const kEntryElementImg=@"img"; 


- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict { 
    if (parsedPromoListCounter >= kMaximumNumberOfEarthquakesToParse) { 
     // Use the flag 
    didAbortParsing = YES; 
     [parser abortParsing]; 
    } 
    if ([elementName isEqualToString:kEntryElementName]) { 
     PromoListItem *promoitem = [[PromoListItem alloc] init]; 
     self.currentPromoListObject = promoitem; 
     [promoitem release]; 

} else if ([elementName isEqualToString:kEntryElementImg]) { 
    //nothing for now 
    } else if ([elementName isEqualToString:kArtistName] || [elementName isEqualToString:kEntryElementImg] || [elementName isEqualToString:kEntryElementID]) { 
    accumulatingParsedCharacterData = YES; 

     // The mutable string needs to be reset to empty. 
     [currentParsedCharacterData setString:@""]; 
    } 
} 

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {  
if ([elementName isEqualToString:kEntryElementName]) { 
    [self.currentParseBatch addObject:self.currentPromoListObject]; 
    parsedPromoListCounter++; 
    if (parsedPromoListCounter % kSizeOfEarthquakeBatch == 0) { 
    [self performSelectorOnMainThread:@selector(addPromosToList:) withObject:self.currentParseBatch waitUntilDone:NO]; 
    self.currentParseBatch = [NSMutableArray array]; 
    } 
} else if ([elementName isEqualToString:kArtistName]) { 
    self.currentPromoListObject.artistName=self.currentParsedCharacterData; 
} else if ([elementName isEqualToString: kEntryElementID]) { 
    self.currentPromoListObject.artistID = self.currentParsedCharacterData; 
} else if ([elementName isEqualToString:kEntryElementImg]) { 

    self.currentPromoListObject.imgLink=self.currentParsedCharacterData; 
} 
// Stop accumulating parsed character data. We won't start again until specific elements begin. 
accumulatingParsedCharacterData = NO; 
} 
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { 
    if (accumulatingParsedCharacterData) { 
    // If the current element is one whose content we care about, append 'string' 
    // to the property that holds the content of the current element. 
    [self.currentParsedCharacterData appendString:string]; 
    } 
    }` 

而且我這是怎麼populat？ e我的表格視圖

#pragma mark Table View Methods 

// The number of rows is equal to the number of earthquakes in the array. 
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { 
    return [self.promoList count]; 
} 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 

// Each subview in the cell will be identified by a unique tag. 
    static NSUInteger const kartistNameLabelTag = 2; 

    // Declare references to the subviews which will display the earthquake data. 
    UILabel *artistNameLabel = nil; 


static NSString *kpromoCellID = @"promoCellID"; 

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kpromoCellID]; 
if (cell == nil) { 
     // No reusable cell was available, so we create a new cell and configure its subviews. 
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:kpromoCellID] autorelease]; 

     artistNameLabel = [[[UILabel alloc] initWithFrame:CGRectMake(10, 3, 190, 20)] autorelease]; 
    artistNameLabel.tag = kartistNameLabelTag; 
     artistNameLabel.font = [UIFont boldSystemFontOfSize:14]; 
     [cell.contentView addSubview: artistNameLabel]; 

} else { 
     // A reusable cell was available, so we just need to get a reference to the subviews using their tags. 
     artistNameLabel = (UILabel *)[cell.contentView viewWithTag:kartistNameLabelTag]; 

    } 

    // Get the specific promo for this row. 
PromoListItem *promo = [promoList objectAtIndex:indexPath.row]; 

    // Set the relevant data for each subview in the cell. 
    artistNameLabel.text =promo.artistName; 

return cell; 

} 

Answer 1

這讓我很生氣，所以我採取了不同的方法。

這裏是代碼執行我做

我不知道哪種方法比較好。也許有人會對此有意見？

我無法工作的第一個版本似乎讓你更好地控制字符數據被解析。這是我能看到的唯一真正的好處。

(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict { 

    if([elementName isEqualToString:@"promolist"]) { 
     //Initialize the array. 
     promoList = [[NSMutableArray alloc] init]; 
    } 
    else if([elementName isEqualToString:kEntryElementName]) { 

     //Initialize the book. 
     //aBook = [[Book alloc] init]; 
     //aBook =[[PromoListItem alloc] init]; 
     PromoListItem *promo = [[PromoListItem alloc] init]; 
     self.currentPromoListObject = promo; 
     [promo release]; 

    } 

    NSLog(@"Processing Element: %@", elementName); 
} 

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { 

    if(!currentParsedCharacterData) 
     currentParsedCharacterData = [[NSMutableString alloc] initWithString:string]; 
    else 
     [currentParsedCharacterData appendString:string]; 

NSLog(@"Processing Value: %@", currentParsedCharacterData); } 

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName 
    namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { 

    if([elementName isEqualToString:@"promolist"]) 
    { 
     [self.tableView reloadData]; 
     return; 
    } 

    //There is nothing to do if we encounter the promo element here. 
    //If we encounter the promo element howevere, we want to add the book object to the array 
    // and release the object. 
    else if([elementName isEqualToString:kEntryElementName]) { 
     [promoList addObject:currentPromoListObject]; 

     [currentPromoListObject release]; 
     currentPromoListObject = nil; 
    } 
    else{ 
     [currentPromoListObject setValue:currentParsedCharacterData forKey:elementName]; 

     } 
    [currentParsedCharacterData release]; 
    currentParsedCharacterData = nil; 

}