UITextView在UITableViewCell中

Question

- (void)textViewDidChange:(UITextView *)textView
{
    CGPoint pos = [textView convertPoint:CGPointZero toView:self.editTableView];
    NSIndexPath *indexPath = [self.editTableView indexPathForRowAtPoint:pos];
    NSLog(@"indexpath %@", indexPath);
    AHAttribute *attribute = self.schedule.attributes[indexPath.row];
    attribute.value = textView.text;
    NSLog(@"changed Attribute textView %@", attribute.value);
}

你看，当我在TableView中的textView中插入7行时，该方法可以工作7次 然后，NSLog告诉我这个：

indexPath {length = 2, path = 4 - 0}
changed Attribute textView (newline)

indexPath {length = 2, path = 4 - 0}
changed Attribute textView (newline)
(newline)

indexPath {length = 2, path = 4 - 0}
changed Attribute textView (newline)
(newline)
(newline)

indexPath {length = 2, path = 4 - 0}
changed Attribute textView (newline)
(newline)
(newline)
(newline)

indexPath {length = 2, path = 4 - 0}
changed Attribute textView (newline)
(newline)
(newline)
(newline)
(newline)

indexPath {length = 2, path = 4 - 0}
changed Attribute textView (newline)
(newline)
(newline)
(newline)
(newline)
(newline)

indexPath {length = 2, path = 3 - 1}
-error code...-

所以我改变了我的代码：

  - (void)textViewDidChange:(UITextView *)textView
  {
      UITableViewCell *cell = [[[textView superview] superview] superview];
      NSIndexPath *indexPath = [self.editTableView indexPathForCell:cell];
      NSLog(@"indexpath %@", indexPath);
      AHAttribute *attribute = self.schedule.attributes[indexPath.row];
      attribute.value = textView.text;
      NSLog(@"changed Attribute textView %@", attribute.value);
  }

然后更改代码显示我想要的一个indexPath。 但为什么第一个代码会显示另一个indexPath？如果你帮助我，我很感激。