Question

提前致谢。请帮我找出错误。

在我的应用程序中，我有可扩展的tableview。当我尝试显示部分中的所有行时，应用程序崩溃。

for (int i=0; i<rows; i++)
                {
                    NSIndexPath *tmpIndexPath = [NSIndexPath indexPathForRow:i
                                                                   inSection:section];
                    [tmpArray addObject:tmpIndexPath];
                }

但如果循环类似于 tableView :( UITableView *）tableView didSelectRowAtIndexPath：（NSIndexPath *）indexPath

，则可以正常工作

for (int i=1; i<rows; i++)
                {
                    NSIndexPath *tmpIndexPath = [NSIndexPath indexPathForRow:i
                                                                   inSection:section];
                    [tmpArray addObject:tmpIndexPath];
                }

由于未捕获的异常'NSInternalInconsistencyException'而终止应用程序，原因：'无效更新：第0节中的行数无效。更新后的现有部分中包含的行数（6）必须等于更新前该部分中包含的行数（1），加上或减去从该部分插入或删除的行数（插入6个，删除0个）以及加入或减去移入或移出该部分的行数（ 0移入，0移出）。'

*** First throw call stack:
(
    0   CoreFoundation                      0x02d9c5e4 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x02b1f8b6 objc_exception_throw + 44
    2   CoreFoundation                      0x02d9c448 +[NSException raise:format:arguments:] + 136
    3   Foundation                          0x0270023e -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 116
    4   UIKit                               0x0196320d -[UITableView _endCellAnimationsWithContext:] + 13402
    5   UIKit                               0x01972c60 -[UITableView _updateRowsAtIndexPaths:updateAction:withRowAnimation:] + 337
    6   UIKit                               0x01972c9f -[UITableView insertRowsAtIndexPaths:withRowAnimation:] + 55
    7   UIKit                               0x0dceada5 -[UITableViewAccessibility(Accessibility) insertRowsAtIndexPaths:withRowAnimation:] + 65
    8   BPSSalesDocs                        0x00222d10 -[MiddlePageViewController_iPhone tableView:didSelectRowAtIndexPath:] + 1152
    9   UIKit                               0x01973ec1 -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] + 1513
    10  UIKit                               0x01974034 -[UITableView _userSelectRowAtPendingSelectionIndexPath:] + 279
    11  UIKit                               0x01978018 __38-[UITableView touchesEnded:withEvent:]_block_invoke + 43
    12  UIKit                               0x018aed33 ___afterCACommitHandler_block_invoke + 15
    13  UIKit                               0x018aecde _applyBlockToCFArrayCopiedToStack + 403
    14  UIKit                               0x018aeb0a _afterCACommitHandler + 532
    15  CoreFoundation                      0x02d6453e __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
    16  CoreFoundation                      0x02d6448f __CFRunLoopDoObservers + 399
    17  CoreFoundation                      0x02d423b4 __CFRunLoopRun + 1076
    18  CoreFoundation                      0x02d41b33 CFRunLoopRunSpecific + 467
    19  CoreFoundation                      0x02d4194b CFRunLoopRunInMode + 123
    20  GraphicsServices                    0x04b449d7 GSEventRunModal + 192
    21  GraphicsServices                    0x04b447fe GSEventRun + 104
    22  UIKit                               0x0189294b UIApplicationMain + 1225
    23  BPSSalesDocs                        0x001c8a3d main + 141
    24  libdyld.dylib                       0x03822725 start + 0
)
libc++abi.dylib: terminating with uncaught exception of type NSException

以下是UITable View didSelectRowAtIndexPath

的代码

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    _ParentCollection = [[Content alloc] initWithDictionary:[_collections objectAtIndex:indexPath.section]];
    [self performSelectorOnMainThread:@selector(loadChildCollection:) withObject:[_ParentCollection collectionId] waitUntilDone:YES];
    if ([_childCollections count] > 0) {
        if ([self tableView:tableView canCollapseSection:indexPath.section]) {
            if (!indexPath.row) {
                [tableView deselectRowAtIndexPath:indexPath animated:YES];

                NSInteger section = indexPath.section;
                BOOL currentlyExpanded = [_expandedSections containsIndex:section];
                NSInteger rows;

                NSMutableArray *tmpArray = [NSMutableArray array];

                if (currentlyExpanded)
                {
                    rows = [self tableView:tableView numberOfRowsInSection:section];
                    [_expandedSections removeIndex:section];
                }
                else
                {
                    [_expandedSections addIndex:section];
                    rows = [self tableView:tableView numberOfRowsInSection:section];
                }

                for (int i=0; i<rows; i++)
                {
                    NSIndexPath *tmpIndexPath = [NSIndexPath indexPathForRow:i
                                                                   inSection:section];
                    [tmpArray addObject:tmpIndexPath];
                }

                if (currentlyExpanded)
                {
                    [tableView deleteRowsAtIndexPaths:tmpArray
                                     withRowAnimation:UITableViewRowAnimationTop];
                }
                else
                {
                    [tableView insertRowsAtIndexPaths:tmpArray
                                     withRowAnimation:UITableViewRowAnimationTop];
                }
            }
            else {
                self.childCollectionContent = [[Content alloc] initWithDictionary:[self.childCollections objectAtIndex:indexPath.row]];

                UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:[DeviceHelper getStoryboardName] bundle:nil];

                ContentViewController *contentViewController = (ContentViewController*)[mainStoryboard instantiateViewControllerWithIdentifier: @"ContentViewController"];
                [contentViewController setNavigationalContents:_childCollections];
                [contentViewController setCollectionId:[NSString stringWithFormat:@"%@", [self.childCollectionContent collectionId]]];
                [contentViewController setContentId:[self.childCollectionContent contentId]];
                [contentViewController setTitle:[self.childCollectionContent title]];
                [contentViewController setContentType:[self.childCollectionContent type]];


                //        [contentViewController setContentUpdateDelegate:_contentUpdateDelegate];
                //        [contentViewController setContentNavigationDelegate:_contentNavigationDelegate];

                if ([[[AppService sharedService] mainViewController] isKindOfClass:[UINavigationController class]]) {
                    UINavigationController* navigationController = (UINavigationController*)[[AppService sharedService] mainViewController];
                    navigationController.navigationBarHidden  = NO;
                    [navigationController pushViewController:contentViewController animated:YES];
                    NSDictionary *attributes = @{NSForegroundColorAttributeName: [UIColor whiteColor]};
                    [[navigationController navigationBar] setTitleTextAttributes:attributes];

                } else {
                    [[[AppService sharedService] mainViewController] presentViewController:contentViewController animated:YES completion:nil];
                }

                AnalyticsClicked* analyticsClicked = [[AnalyticsClicked alloc] init];
                analyticsClicked.collectionId = [self.childCollectionContent collectionId];
                analyticsClicked.contentId = [self.childCollectionContent contentId];
                analyticsClicked.contentNumber = [self.childCollectionContent contentNumber];

                [[[AppService sharedService] analytics] platformAnalyticsContentClickPush:analyticsClicked];
            }
        }
    }
}

和numberOfRowsInSections代码

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
//    return [_collections count];
    if ([self tableView:tableView canCollapseSection:section]) {
        if ([_expandedSections containsIndex:section]) {
            return [_childCollections count];
        }
    }
    return 1;
}

Answer 1

我终于能够克服那个错误。在我的 didSelectRowAtIndexPath 中，我更改了以下代码

if (currentlyExpanded)
                {
                    [tableView deleteRowsAtIndexPaths:tmpArray
                                     withRowAnimation:UITableViewRowAnimationTop];
                }
                else
                {
                    [tableView insertRowsAtIndexPaths:tmpArray
                                     withRowAnimation:UITableViewRowAnimationTop];
                }

与

if (currentlyExpanded)
                {
                    [tableView beginUpdates];
                    [tableView reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationTop];
                    [tableView deleteRowsAtIndexPaths:tmpArray
                                     withRowAnimation:UITableViewRowAnimationTop];
                    [tableView endUpdates];
                }
                else
                {
                    [tableView beginUpdates];
                    [tableView reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationTop];
                    [tableView insertRowsAtIndexPaths:tmpArray
                                     withRowAnimation:UITableViewRowAnimationTop];
                    [tableView endUpdates];
                }

我认为问题是由于更新前和更新后的行数不匹配，只需通过调用即可解决

[tableView reloadSections：[NSIndexSet indexSetWithIndex：indexPath.section]

重置行数。如果有人想改进或纠正这个问题，请纠正我。

由于未捕获的异常'NSInternalInconsistencyException'而终止应用程序，原因：'无效更新：第0节中的行数无效

1 个答案: