Question

在我的刷新方法中，我使用以下代码滚动到顶部，它工作正常，但是当我在第三个单元格后向下滚动并再次点击刷新时，它会崩溃应用程序，错误终止，类型为未捕获异常NSException。

- (void)viewDidLoad
{
    [super viewDidLoad];

    NewsTbView.delegate = self;
    NewsTbView.dataSource = self;

    [self refresh]; 
}

-(void)refresh
{
    catName = @"All";
    self.imageArray = [[NSMutableArray alloc]init];
    self.titleArray = [[NSMutableArray alloc]init];
    self.descArray = [[NSMutableArray alloc]init];
    self.dateArray = [[NSMutableArray alloc]init];
    self.linkArray = [[NSMutableArray alloc]init];
    self.categoryArray = [[NSMutableArray alloc]init];
    self.categoryNewsArray = [[NSMutableArray alloc]init];

    self.imageCatArray = [[NSMutableArray alloc]init];
    self.titleCatArray = [[NSMutableArray alloc]init];
    self.descCatArray = [[NSMutableArray alloc]init];
    self.dateCatArray = [[NSMutableArray alloc]init];
    self.linkCatArray = [[NSMutableArray alloc]init];
    // Create the request.
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:[config getXmlWordPress]]];

    // Create url connection and fire request

    conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];

    MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];

    hud.mode = MBProgressHUDModeIndeterminate;
    hud.labelText = @"Verversen";
    hud.dimBackground = YES;

    [NewsTbView scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:YES];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"CellIndent";
    TableViewCellHome *cell = (TableViewCellHome *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    NSString *CellName;

    CellName = @"TableViewCellHome";

    if (cell == nil) {

        UIViewController *c = [[UIViewController alloc] initWithNibName:CellName bundle:nil];

        cell = (TableViewCellHome *)c.view;
    }

    cell.textLabel.numberOfLines = 0;

    [cell.txtDate setAlpha:0];
    [cell.txtTitle setAlpha:0];
    [cell.btnShare setAlpha:0];
    [cell.imgNews setAlpha:0];

    [UIView beginAnimations:@"CustomCellAnimation" context:NULL];
    [UIView setAnimationDuration:1.0f];
    [cell.txtDate setAlpha:1];
    [cell.txtTitle setAlpha:1];
    //[cell.btnShare setAlpha:1];
    [cell.imgNews setAlpha:1];
    [UIView commitAnimations];

    if ([catName isEqualToString:@"All"]) {
        cell.txtTitle.text = [titleArray objectAtIndex:indexPath.row];
        cell.txtDate.text = [dateArray objectAtIndex:indexPath.row];
        [cell.imgNews setImage:[imageArray objectAtIndex:indexPath.row]];
        [cell.btnShare    addTarget:self
                             action:@selector(sharePost:)
                   forControlEvents:UIControlEventTouchUpInside];
        cell.btnShare.tag = indexPath.row;
    }
    else
    {
        cell.txtTitle.text = [titleCatArray objectAtIndex:indexPath.row];
        cell.txtDate.text = [dateCatArray objectAtIndex:indexPath.row];
        [cell.imgNews setImage:[imageCatArray objectAtIndex:indexPath.row]];
        [cell.btnShare    addTarget:self
                             action:@selector(sharePost:)
                   forControlEvents:UIControlEventTouchUpInside];
        cell.btnShare.tag = indexPath.row;

    }

    return cell;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    NSInteger total;
    if ([catName isEqualToString:@"All"]) {
        total = imageArray.count;
    }
    else
    {
        total = imageCatArray.count;
    }
    return total;
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

UITableView有7个动态单元格。我是否需要添加一些东西以使其适用于整个tableview？

完整的错误消息：

Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 1 beyond bounds for empty array' *** First throw call stack: (0x189516f50 0x195a201fc 0x1894184b0 0x1000984d0 0x18c628904 0x18c5c6db0 0x18c5c662c 0x18c4daff8 0x18c0cc258 0x18c0c6e20 0x18c0c6cd8 0x18c0c6560 0x18c0c6304 0x18c11cb84 0x18a417e74 0x1894c88e0 0x1894d6e90 0x1894d6df0 0x1894d5014 0x189415c20 0x18f0fdc0c 0x18c546fdc 0x10008cedc 0x196013aa0) libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

尝试将所有NSMutableArray alloc移入viewDidLoad方法。发生的事情是，每次刷新时都会重新初始化数组，这会刷新第一个并且只给它一个可用的索引。

在第三个单元格（未捕获的异常）之后刷新UITableView崩溃后滚动到顶部

1 个答案: