訪問數組中的對象的屬性以在UITableViewCell中顯示

Question

我正在使用XML解析器從博客獲取信息以創建饋送閱讀器應用程序。我創建了一個對象，其屬性是每個博客條目的數據（標題，發佈，作者...）。我將數據存儲在對象中，然後使用指針將對象放入解析數據的數組中。當我去訪問屬性以在我的UITableView中顯示它們時，每個單元格都是相同的，每個單元格的最後一個博客條目的數據都是相同的。

解析器.m文件

@interface Parser() 

//This property holds the blog objects that were parsed 
@property (nonatomic, strong) NSMutableArray *parsedResults; 

//This property holds the current element content being parsed 
@property (nonatomic, strong) NSString *currentElement; 

@property (nonatomic, strong) FRFeedItem *blogEntry; 

@end 


@implementation SolsticeParser 

@synthesize parsedResults = _parsedResults; 
@synthesize currentElement = _currentElement; 

// Will be used to truncate data parsed from publish tag so that it will only store the YYYY-MM-DD to self.blogEntry.datepublished 
NSRange dateOnly = {0, 10}; 

//This method initializes the parser, sets the delegate, starts parsing, and returns the results. 
- (NSMutableArray *)parseFeedWithResults:(NSURL *)URL 
{ 
NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:URL]; 
parser.delegate = self; 
self.parsedResults = [[NSMutableArray alloc] init]; 
[parser parse];    // Everything parsed here 
return self.parsedResults; 
} 

...這裏分析的數據保存到BlogEntry對象的屬性...

#pragma mark - Parser delegate 

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

// Custom blog object initialized here 
    if ([elementName isEqualToString:@"entry"]) { 
     if (!self.blogEntry) { 
      self.blogEntry = [[FRFeedItem alloc] init]; 

     } 
    } 

} 
... 

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

if([elementName isEqualToString:@"title"]) { 
    self.blogEntry.title = self.currentElement; 

} else if([elementName isEqualToString:@"published"]) { 
    self.blogEntry.datePublished = [self.currentElement substringWithRange:dateOnly]; 

} else if([elementName isEqualToString:@"entry"]) { 
    [self.parsedResults addObject:self.blogEntry]; 
} 
} 

在MyTableViewController.m：

@interface MyTableViewController() 

@property (nonatomic, strong) Parser* parser; 
@property (nonatomic, strong) NSMutableArray* feedDataFromParser; 

@end 

@implementation MyTableViewController 

// synthesize automatically done by Xcode v4.6 

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 
self.parser = [[Parser alloc] init]; // initialize parser by allocating memory on the heap 
[self loadItems]; // automatically loads data to be displayed upon opening the app 

} 

- (void)loadItems 
{ 
// information parsed from blog stored to a mutable array 
self.feedDataFromParser = [self.parser parseFeedWithResults:[NSURL URLWithString:kFeedURL]]; 
} 

... 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
//code not included for this question for brevity 

// Configure the cell from data stored in mutable array of FRFeedItem objects 
// PROBLEM: 
cell.textLabel.text = [[self.feedDataFromParser objectAtIndex:indexPath.row] title]; 
cell.detailTextLabel.text = [[self.feedDataFromParser objectAtIndex:indexPath.row] datePublished]; 

return cell; 
} 
@end 

據我所知，沒有任何語法錯誤。我試着打印出解析出的數據並保存到解析器文件中的對象以及indexPath.row的值，並且兩者都是正確的。 我在想什麼？

Answer 1

我認爲這個問題是這一行：

if (!self.blogEntry) 

創建第一個後，你不會產生任何更多。嘗試刪除if子句，看看是否修復它。