新可见行NSInternalInconsistencyException的UITableView缺少单元格

问题描述

我的应用程序一直遇到此问题，不确定出现了什么问题.致命异常:NSInternalInconsistencyException新可见的第78行缺少单元格

I've been getting this issue with my app and not sure what went wrong.Fatal Exception: NSInternalInconsistencyExceptionMissing cell for newly visible row 78

这是堆栈跟踪:

Fatal Exception: NSInternalInconsistencyException
0  CoreFoundation                 0x191bbefd8 __exceptionPreprocess
1  libobjc.A.dylib                0x190620538 objc_exception_throw
2  CoreFoundation                 0x191bbeeac +[NSException raise:format:]
3  Foundation                     0x192656710 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:]
4  UIKit                          0x198022b3c __46-[UITableView _updateWithItems:updateSupport:]_block_invoke.1049
5  UIKit                          0x197d234b8 +[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:]
6  UIKit                          0x197d39bac +[UIView(UIViewAnimationWithBlocks) animateWithDuration:delay:options:animations:completion:]
7  UIKit                          0x197ee8770 -[UITableView _updateWithItems:updateSupport:]
8  UIKit                          0x197eccfbc -[UITableView _endCellAnimationsWithContext:]
9  MyApp                      0x1000ed518 -[UICommentsTableViewController insertNewComment:atLocation:] (UICommentsTableViewController.m:1228)
10 MyApp                      0x1000e99e8 -[UICommentsTableViewController onCommentsReceivedWithMessage:] (UICommentsTableViewController.m:881)
11 MyApp                      0x1000e9094 -[UICommentsTableViewController processWSMessage:] (UICommentsTableViewController.m:803)
12 MyApp                      0x1000e8f84 -[UICommentsTableViewController webSocket:didReceiveMessage:] (UICommentsTableViewController.m:788)
13 MyApp                      0x10009ea30 __30-[SRWebSocket _handleMessage:]_block_invoke (SRWebSocket.m:837)
14 libdispatch.dylib              0x190a769e0 _dispatch_call_block_and_release
15 libdispatch.dylib              0x190a769a0 _dispatch_client_callout
16 libdispatch.dylib              0x190a7b5e8 _dispatch_main_queue_callback_4CF
17 CoreFoundation                 0x191b6d0c0 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
18 CoreFoundation                 0x191b6acdc __CFRunLoopRun
19 CoreFoundation                 0x191a9ad94 CFRunLoopRunSpecific
20 GraphicsServices               0x193504074 GSEventRunModal
21 UIKit                          0x197d53130 UIApplicationMain
22 MyApp                      0x10011ba40 main (main.m:7)
23 libdyld.dylib                  0x190aa959c start

错误发生在这里:

- (void)insertNewComment:(NSIndexSet *)indexSet atLocation:(NSInteger)location{

    [self.tableView beginUpdates];

    NSMutableArray *indexArray = [NSMutableArray new];
    if (!indexSet) {
        [indexArray addObject:[NSIndexPath indexPathForRow:location inSection:0]];
    } else {
        [indexSet enumerateIndexesUsingBlock:^(NSUInteger index, BOOL *stop ) {
            [indexArray addObject:[NSIndexPath indexPathForRow:index inSection:0]];
        }];
    }

    [self.tableView insertRowsAtIndexPaths:indexArray withRowAnimation:UITableViewRowAnimationBottom];
    [self.tableView endUpdates];

}

我正在为单元格使用AutoLayout，但是我手动计算了高度并根据其设备方向对其进行缓存.

I'm using AutoLayout for the cell, but I calculated the height manually and cache them according to their device orientation.

高度计算器:

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


    Comment* comment = self.comments[indexPath.row];

    CGFloat cellHeight = [self getHeightForLayoutMode:self.screenMode forCommentID:comment.commentID];

    if(cellHeight > 0) {

        return cellHeight;
    }


    if([comment isType2]) {
        [self setHeightForLayoutMode:self.screenMode forCommentID:comment.commentID height:106];
        return 106;
    }

    CGFloat width = tableView.bounds.size.width - 100;

    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle defaultParagraphStyle] mutableCopy];
    paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;


    NSDictionary *attributes = @{NSFontAttributeName: [UIFont fontWithName:@"MyFont" size:11.0f], NSParagraphStyleAttributeName:paragraphStyle};

    CGRect rect = [comment.message boundingRectWithSize:CGSizeMake(width, CGFLOAT_MAX)
                                                options:NSStringDrawingUsesLineFragmentOrigin
                                             attributes:attributes
                                                context:nil];

    CGFloat height = 31+ceilf(rect.size.height);

    [self setHeightForLayoutMode:self.streamViewController.screenMode forCommentID:comment.commentID height:height];

    return height;
}

有人遇到了这样的问题(更新UITableView时，新可见行缺少单元格崩溃)，并且它们只是删除了EstimateSectionHeaderHeight，但是我的代码上没有EstimatedSectionHeaderHeight.

Someone had an issue like this (Crash with Missing cell for newly visible row when updating UITableView), and they just removed estimatedSectionHeaderHeight, but I don't have estimatedSectionHeaderHeight on my code.

推荐答案

当插入值时节数超出范围时，将发生此错误.这不是高度问题.

This error occurs when the number of sections is out of range when inserting the value. It's not a height issue.

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