调用 UITableView reloadSections 方法崩溃

Question

I just do the normal operation: Request the data from the server and refresh the tableview by reloadSections , but I do get a lot of crash logs. If I call reloadData , everything is OK. Even though I known reloadData works well, it seems that reloadSections works more efficiently.
Does anybody have any ideas?

Get data from the server by persistent connection :

[_pomelo onRoute:@"onTlive" withCallback:^(NSDictionary *data) {
    @strongify(self);
    if (self.liveTableView) {
        [self.liveTableView configData:data refresh:self.playerView.isScreenPortrait];
    }
}];

Then config the data and refresh the tableview:

- (void)configData:(NSDictionary *)data refresh:(BOOL)refresh {
if (!data || data.allKeys.count == 0) {
    return;
}
NSArray *liveArray = [data valueForKeyPath:@"body.data"];
[liveArray enumerateObjectsUsingBlock:^(NSString *obj, NSUInteger idx, BOOL * _Nonnull stop) {
    NSArray *liveDetailInfo = [obj componentsSeparatedByString:@"|"];
    if (liveDetailInfo && liveDetailInfo.count > 0) {
        NSArray *tliveInfo = [liveDetailInfo.lastObject componentsSeparatedByString:@"^"];
        SPBasketballLive *liveObject = [SPBasketballLive new];
        liveObject.type = tliveInfo[0];
        liveObject.time = tliveInfo[1];
        liveObject.team = tliveInfo[2];
        liveObject.playerId = tliveInfo[3];
        liveObject.score = tliveInfo[4];
        liveObject.text = tliveInfo[5];
        liveObject.quarter = ((NSString *)liveDetailInfo.firstObject).integerValue;
        if (self.curMatch.liveInfo.count == liveObject.quarter) { 
            NSMutableArray *quarterArray  = self.curMatch.liveInfo.firstObject;
            [quarterArray insertObject:liveObject atIndex:0];
        } else { 
            NSMutableArray *quarterArray = [NSMutableArray new];
            [quarterArray addObject:liveObject];
            [self.curMatch.liveInfo insertObject:quarterArray atIndex:0];
        }
    }
}];
if (refresh) {
    if (_curMatch.liveInfo.count > 0) {
        [self.myTableView reloadSections:[NSIndexSet indexSetWithIndex:4] withRowAnimation:UITableViewRowAnimationNone];
    }
}
}

Here is the crash log:

invalid update: invalid number of rows in section 4. The number of rows contained in an existing section after the update (98) must be equal to the number of rows contained in that section before the update (96), plus or minus the number of rows inserted or deleted from that section (0 inserted, 0 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out)

Answer 1

Your app crashed because reloadSection method won't update section and row counters so it causes crashes in cases when you changed section or row counter and your UITableView have different counters.

And when you use reloadData it first call numberOfSectionsInTableView and then numberOfRowsInSection is called so your UITableView has correct counters for sections and rows.