通过重新加载 10-10 新闻扩展 tableView 行中的问题

Posted 2023-02-23

【中文标题】通过重新加载 10-10 新闻扩展 tableView 行中的问题

【英文标题】：Problem in Extended the tableView rows with reloading the 10-10 News

【发布时间】：2011-09-20 09:14:26

【问题描述】：

我的程序运行良好，但问题是我想用当前行扩展我的行。 我有每页给我 10 条新闻的 API，我想用这个新闻标题更新我的 tableViewRows。在开始时我用第一页解析 Api（IDValue 用于页面）首先我的表格视图在 UIAlert 之后加载并在完成解析后开始解析（[myTableView reloadData];）用 10 个新闻 Raw 更新 tableView 但我当我再次单击此解析开始时，有第 11 行具有“加载更多 10 条新闻选项”，但最后我想更新我的表格视图，并扩展下 10 条新闻，例如（前 10 条 + 新 10 条）新闻 = 20 TableView 中的新闻（行），但它给了我“SIGABRT”错误。

我与您分享我的 .h 和 .m 文件，请仔细阅读并给我建议，请告诉我如何克服这个错误。

错误是：

2011-09-20 14:28:57.278 工作[8692:207] * 由于以下原因终止应用程序 未捕获的异常 'NSRangeException'，原因：' -[NSMutableArray objectAtIndex:]: 索引 11 超出范围 [0 .. 9]' ** 首次抛出时调用堆栈：( 0 CoreFoundation 0x013ac5a9 异常预处理 + 185 1 libobjc.A.dylib 0x01500313 objc_exception_throw + 44 2 核心基础 0x013a20a5 -[__NSArrayM objectAtIndex:] + 261 3 FashionUnited 0x00005288 -[NewsMainVC tableView:cellForRowAtIndexPath:] + 648 4 UIKit 0x00673b98 -[UITableView（UITableView 内部） _createPreparedCellForGlobalRow:withIndexPath:] + 634 5 UIKit 0x006694cc -[UITableView(UITableViewInternal) _createPreparedCellForGlobalRow:] + 75 6 UIKit 0x0067e8cc -[UITableView(_UITableViewPrivate) _updateVisibleCellsNow:] + 1561 7 UIKit 0x0067690c -[UITableView layoutSubviews] + 242 8 QuartzCore 0x01e06a5a -[CALayer layoutSublayers] + 181 9 QuartzCore 0x01e08ddc CALayerLayoutIfNeeded + 220 10 QuartzCore 0x01dae0b4 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 310 11 石英核心 0x01daf294 _ZN2CA11Transaction6commitEv + 292 12 QuartzCore 0x01daf46d _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 99 13 核心基础 0x0138d89b __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION + 27 14 CoreFoundation 0x013226e7 __CFRunLoopDoObservers + 295 15 核心基础 0x012ea857 CFRunLoopRunSpecific + 231 16 核心基础 0x012ea761 CFRunLoopRunInMode + 97 17 图形服务 0x019f61c4 GSEventRunModal + 217 18 图形服务 0x019f6289 GSEventRun + 115 19 UIKit 0x0060cc93 UIApplicationMain + 1160 20 FashionUnited 0x00002d49 主要 + 121 21 FashionUnited 0x00002cc5 start + 53 ) 在抛出一个实例后调用终止 'NSException'

并且每次使用 +10 新闻扩展 TableRows。

.h 文件

NewsMainVC.h

@class DetailNewsDisplayController,NewsInfo,NewsParser;

@interface NewsMainVC : UIViewController <UITableViewDelegate,UITableViewDataSource> 

    int selectedLanguage;
    int currentLanguage;

    NSInteger IDValue;

    NSMutableData *responseData;

    NewsParser *parser;

    NSURL *url;
    UIAlertView *alert;
    NewsInfo *aNewsInfo;

    NSString *FinalString;
    UIAlertView *alertNext;

    UITableViewCell *nibLoadedCell;
    UIActivityIndicatorView *spinnerNext;

    DetailNewsDisplayController *ndvController;

    UIActivityIndicatorView *spinner;
    UIAlertView *alertt;

    IBOutlet UILabel *textLabel;
    IBOutlet UITextView *textView;
    IBOutlet UILabel *titleLabel;
    IBOutlet UIImageView *imageLabel;
    IBOutlet UITableView *myTableView;



@property (nonatomic, retain) UIAlertView *alertt;
@property (nonatomic, retain) UIActivityIndicatorView *spinner;
@property (assign, readwrite) NSInteger IDValue;
@property (assign,readwrite) int selectedLanguage;
@property (nonatomic, retain) NSString *FinalString;
@property (nonatomic, retain) IBOutlet UILabel *pages;
@property (nonatomic,retain) IBOutlet UITableViewCell *nibLoadedCell;
@property (nonatomic,retain) NSData *responseData;

-(IBAction) goToOptions:(id)sender;

- (void) parseXML;

-(NSString*) languageSelectedStringForKey:(NSString*) key;

.m 文件

@implementation NewsMainVC
@synthesize selectedLanguage;
@synthesize nibLoadedCell,optionPageVC,FinalString,IDValue,spinner,alertt,responseData;


extern int global;


- (void)viewDidLoad

    // Do any additional setup after loading the view from its nib.

    appDelegate = (WorkAppDelegate *)[[UIApplication sharedApplication] delegate];
    IDValue = 1;
    textLabel.text=[self languageSelectedStringForKey:@"Welcome to Advance Localization"];

    NSString *mainWaitMessage = NSLocalizedString (@"Contacting Server\nPlease Wait...", @"Contacting Server\nPlease Wait...");
    alert = [[[UIAlertView alloc] initWithTitle:mainWaitMessage message:nil delegate:self cancelButtonTitle:nil otherButtonTitles: nil] autorelease];
    [alert show];
    spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    spinner.center = CGPointMake(alert.bounds.size.width / 2, alert.bounds.size.height - 50);
    [alert addSubview:spinner];
    [spinner startAnimating];

    [super viewDidLoad];



- (void)viewWillAppear:(BOOL)animated

    [myTableView reloadData];



#pragma ----------------------
#pragma Select APi According to selectedLanguage

-(NSString*) languageSelectedStringForKey:(NSString*) key

    NSString *path = [[NSBundle mainBundle] pathForResource:@"zh" ofType:@"lproj"];

    if(selectedLanguage==MGD_LANG)
    

        FinalString = [[NSString alloc] initWithFormat:@"http://www.xyz.com/api.php?page_id=%d",IDValue];

    
    else if(selectedLanguage==TKY_LANG)
    

        FinalString = [[NSString alloc] initWithFormat:@"http://www.abc.com/api.php?page_id=%d",IDValue];

    

     url = [[NSURL alloc] initWithString:FinalString];
    [FinalString release];

    // Create the Request.
    NSURLRequest *request = [NSURLRequest requestWithURL:url
                                             cachePolicy:NSURLRequestUseProtocolCachePolicy 
                                         timeoutInterval: 30.0];
   // [url release];

    // Create the connection and send the request
    NSURLConnection *connection = 
    [[NSURLConnection alloc] initWithRequest:request delegate:self];

    // Make sure that the connection is good
    if (connection) 
        // Instantiate the responseData data structure to store to response
        self.responseData = [NSMutableData data];

    
    else 
        NSLog (@"The connection failed");
    

    NSBundle* languageBundle = [NSBundle bundleWithPath:path];
    NSString* str=[languageBundle localizedStringForKey:key value:@"" table:nil];

    return str;



#pragma mark -
#pragma mark NSURLConnection delegate methods

// Called when a redirect will cause the URL of the request to change
- (NSURLRequest *)connection:(NSURLConnection *)connection 
             willSendRequest:(NSURLRequest *)request 
            redirectResponse:(NSURLResponse *)redirectResponse

    NSLog (@"connection:willSendRequest:redirectResponse:");
    return request;


// Called when the server requires authentication
- (void)connection:(NSURLConnection *)connection 
didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge

    NSLog (@"connection:didReceiveAuthenticationChallenge:");


// Called when the authentication challenge is cancelled on the connection
- (void)connection:(NSURLConnection *)connection 
didCancelAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge

    NSLog (@"connection:didCancelAuthenticationChallenge:"); 


// Called when the connection has enough data to create an NSURLResponse
- (void)connection:(NSURLConnection *)connection
didReceiveResponse:(NSURLResponse *)response 
    NSLog (@"connection:didReceiveResponse:");
    NSLog(@"expectedContentLength: %qi", [response expectedContentLength] );
    NSLog(@"textEncodingName: %@", [response textEncodingName]);

    [self.responseData setLength:0];



// Called each time the connection receives a chunk of data
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data

    NSLog (@"connection:didReceiveData:");

    // Append the received data to our responseData property
    [self.responseData appendData:data];



// Called before the response is cached
- (NSCachedURLResponse *)connection:(NSURLConnection *)connection
                  willCacheResponse:(NSCachedURLResponse *)cachedResponse

    NSLog (@"connection:willCacheResponse:");
    // Simply return the response to cache
    return cachedResponse;


// Called when the connection has successfully received the complete response
- (void)connectionDidFinishLoading:(NSURLConnection *)connection

    NSLog (@"connectionDidFinishLoading:");

    // Convert the data to a string and log the response string
    NSString *responseString = [[NSString alloc] 
                                initWithData:self.responseData
                                encoding:NSUTF8StringEncoding];
    NSLog(@"Response String: \n%@", responseString);

    [responseString release];
    [connection release];

    [self parseXML];




// Called when an error occurs in loading the response
- (void)connection:(NSURLConnection *)connection 
  didFailWithError:(NSError *)error

    NSLog (@"connection:didFailWithError:");
    NSLog (@"%@",[error localizedDescription]);

    [connection release];




- (void) parseXML

    NSLog (@"parseXML");

    // Initialize the parser with our NSData from the RSS feed
    NSXMLParser *xmlParser = [[NSXMLParser alloc] 
                              initWithData:self.responseData];

    //Initialize the delegate.
    parser = [[NewsParser alloc] initXMLParser];

    //Set delegate
    [xmlParser setDelegate:parser];

    // Start the parser
    if (![xmlParser parse])
    
        NSLog (@"An error occurred in the parsing");    
    

    [myTableView reloadData];

    if (IDValue == 1) 
    [spinner stopAnimating];
    [alert dismissWithClickedButtonIndex:0 animated:YES];
    

    [xmlParser release];




#pragma -
#pragma TableView

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

    return 1;



- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

    return [appDelegate.newsArray count]+1;




// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath


    static NSString *postCellId = @"postCell";
    static NSString *moreCellId = @"moreCell";
    UITableViewCell *cell = nil;

    NSUInteger row = [indexPath row];
    NSUInteger count = [appDelegate.newsArray count];

    if (row == count) 

        cell = [tableView dequeueReusableCellWithIdentifier:moreCellId];
        if (cell == nil) 

            if (cell == nil) 
                [[NSBundle mainBundle] loadNibNamed:@"TableCell103" owner:self options:NULL];
                cell = nibLoadedCell;
            

        

     else 

        cell = [tableView dequeueReusableCellWithIdentifier:postCellId];
        if (cell == nil) 
            [[NSBundle mainBundle] loadNibNamed:@"TableCell13" owner:self options:NULL];
            cell = nibLoadedCell;
        

        aNewsInfo = [appDelegate.newsArray objectAtIndex:indexPath.row];
        titleLabel.text = [aNewsInfo.title stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
        imageLabel.image = aNewsInfo.smallImageData;
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    

    return cell;



- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 

    NSLog(@" Global %d",global);

    NSUInteger row = [indexPath row];
    NSLog(@"%d",row);

    NSUInteger count = [appDelegate.newsArray count];
    NSLog(@"Ini AppDelegate Count  %d",count);

    if (row == count) 


        NSMutableArray *newPosts = [[NSArray alloc] initWithArray:appDelegate.newsArray];  
        NSUInteger newCount = [newPosts count];
        NSLog(@"NewPost  %d",newCount);

        selectedLanguage = global;
        IDValue = IDValue +1;
        textLabel.text=[self languageSelectedStringForKey:@"Welcome to Advance Localization"];

        if (newPosts) 
            [appDelegate.newsArray addObjectsFromArray:newPosts];

            NSUInteger countOne = [appDelegate.newsArray count];
            NSLog(@"appdelegate+newPosts %d",countOne);
            NSUInteger newCountTwo = [newPosts count];
            [newPosts release];
            NSLog(@"NewPost %d",newCountTwo);
            NSMutableArray *insertIndexPaths = [NSMutableArray array];

            for (NSUInteger item = newCount; item < countOne; item++) 

                [insertIndexPaths addObject:[NSIndexPath indexPathForRow:item 
                                                               inSection:0]];
            

            [myTableView beginUpdates];
            [myTableView insertRowsAtIndexPaths:insertIndexPaths 
                                  withRowAnimation:UITableViewRowAnimationFade];
            [myTableView endUpdates];

            [myTableView scrollToRowAtIndexPath:indexPath 
                                  atScrollPosition:UITableViewScrollPositionNone 
                                          animated:YES];

            NSIndexPath *selected = [myTableView indexPathForSelectedRow];
            if (selected) 
                [myTableView deselectRowAtIndexPath:selected animated:YES];
            

        

    
    else 

        ndvController = [[DetailNewsDisplayController alloc] initWithNibName:@"DetailNewsDisplayController" bundle:[NSBundle mainBundle]];
        aNewsInfo = [appDelegate.newsArray objectAtIndex:indexPath.row];

        ndvController.aNewsInfo = aNewsInfo;

        [[self navigationController] pushViewController:ndvController 
                                               animated:YES];
        [ndvController release];
    



-(CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath: (NSIndexPath *)indexPath

    return 63;





@end

【参考方案1】：

当您重新加载表格视图时，您必须增加行数。