Tableview reloading data not working in uitableview - objective-c

Question

As i am deleting the json data .whenever i am deleting the json data i have to remove that particular data in the tableview. Also whenever i trying to remove the data in the first row it throws the exception like "Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'attempt to delete row 1 from section 0 which only contains 1 rows before the update'" and app getting crashed
can anyone suggest me what was problem in the following coding?
- (IBAction)deletebutton:(id)sender {
NSString *userid = [[NSUserDefaults standardUserDefaults]
stringForKey:#"UserId"];
NSString *encodeddistrictvalue = [selecteddistrictvalue stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet alphanumericCharacterSet]];
NSString *encodedPanchaytvalue = [selectedpanchayatvalue stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet alphanumericCharacterSet]];
NSString *urlStr = [NSString stringWithFormat:#"my json url",encodeddistrictvalue,encodedPanchaytvalue,taxtypevariable,selctedassessmentno,userid];NSURL *url = [NSURL URLWithString:urlStr];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response,
NSData *data, NSError *connectionError)
{
if (data.length > 0 && connectionError == nil)
{
NSDictionary *dictionaryvalue = [NSJSONSerialization JSONObjectWithData:data
options:0
error:NULL];
NSString *code = [[dictionaryvalue objectForKey:#"code"] stringValue];
NSLog(#"the response string value is %#",code);
if ([code intValue]==1) {
NSLog(#"deletd sucessfully");
UIAlertController * alert = [UIAlertController
alertControllerWithTitle:#"Alert"
message:#"Are u sure u want to delete the table data"
preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction* yesButton = [UIAlertAction
actionWithTitle:#"yes"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action) {
{
[assessmentnumber removeObject:selctedassessmentno ];
[self.tableview registerClass:[UITableViewCell class] forCellReuseIdentifier:#"expandingCell"];
[_tableview reloadData];
}
}];
[alert addAction:yesButton];
[self presentViewController:alert animated:YES completion:nil];
alert.view.tintColor = [UIColor blackColor];
}
}
} ];
}

Answer 1

put this viewDidLoad
[self.tableview registerClass:[UITableViewCell class] forCellReuseIdentifier:#"expandingCell"];

Answer 2

You can use begin & end update:
Table.beginUpdates()
for i in 0 ..< sections[section].items.count
{
Table.reloadRows(at: [IndexPath(row: i, section: section)], with: .automatic)
}
Table.endUpdates()