Can I override scroll view's automatic behavior to scroll to the first responder?
I didn't test this particular situation, but I've managed to prevent a scrollview from bouncing at the top and bottom by subclassing the scrollview and overriding setContentOffset: and setContentOffset:animated:. The scrollview calls this at every scroll movement, so I'm fairly certain they will be called when scrolling to the textfield.
You can use the delegate method textFieldDidBeginEditing: to determine when the scroll is allowed.
In code:
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
self.blockingTextViewScroll = YES;
}
-(void)setContentOffset:(CGPoint)contentOffset
{
if(self.blockingTextViewScroll)
{
self.blockingTextViewScroll = NO;
}
else
{
[super setContentOffset:contentOffset];
}
}
-(void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated
{
if(self.blockingTextViewScroll)
{
self.blockingTextViewScroll = NO;
}
else
{
[super setContentOffset:contentOffset animated:animated];
}
}
If your current scroll behaviour works with a setContentOffset: override, just place it inside the else blocks (or preferably, in a method you call from the else blocks).
In my project I have succeeded to achieve this by performing my scroll only after some delay.
- (void)keyboardWillShow:(NSNotification *)note
{
NSDictionary *userInfo = note.userInfo;
CGRect keyboardFrame = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
UIEdgeInsets contentInsets = self.tableView.contentInset;
contentInsets.bottom += keyboardFrame.size.height;
[self.tableView setContentInset:contentInsets];
[self performSelector:@selector(scrollToEditableCell) withObject:nil afterDelay:0];
}
Also there is other possibility to make your view with additional views to be first responder and fool scroll view where to scroll. Haven't tested this yet.