无效更新:第0节中的行数无效

I am working on a table UITableViewController in Xcode. Each time when I try to delete a row from the app I have this error:`

我正在做一个Xcode中的表UITableViewController。每当我试图从应用程序中删除一行时，我都会犯这样的错误:

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0.  The number of rows contained in an existing section after the update (3) must be equal to the number of rows contained in that section before the update (3), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out)

Code for table load and delete row is:

表加载和删除行代码为:

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

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.toDoItems count];}

And that's the delete method:

这就是删除方法:

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
    [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
} else if (editingStyle == UITableViewCellEditingStyleInsert) {}
}

I hope you could help me to fix this error! Thank You!

我希望你能帮我改正这个错误!谢谢你！

1 个解决方案

#1

You forgot to remove object from your model self.toDoItems.
Try to update your last method with such body:

您忘记从模型self.toDoItems中删除对象。尝试用这样的主体更新您的上一个方法:

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        [self.toDoItems removeObjectAtIndex:indexPath.row];
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
    } else if (editingStyle == UITableViewCellEditingStyleInsert) {}
    }
}