Moving form content which is located under the keyboard - ios

Question

I am using UITableView, where each cell contains a UITextField, and using Apple official example, I wish to perform goal, moving the active field above the keyboard if it's already hidden. However, the form doesn't move although the UITableView is scroll eabled. Here is my relevant code, please help me pointing on what seems to be missing/wrong:
#interface ViewController (){
UITextField *activeField;
}
- (void)viewDidLoad
{
//....
objTableView.scrollEnabled=YES;
//....
}
#pragma mark - Keyboard notifications
// Call this method somewhere in your view controller setup code.
- (void)registerForKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification object:nil];
}
// Called when the UIKeyboardDidShowNotification is sent.
- (void)keyboardWasShown:(NSNotification*)aNotification
{
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
objTableView.contentInset = contentInsets;
objTableView.scrollIndicatorInsets = contentInsets;
// If active text field is hidden by keyboard, scroll it so it's visible
// Your application might not need or want this behavior.
CGRect aRect = self.view.frame;
aRect.size.height -= kbSize.height;
if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) {
CGPoint scrollPoint = CGPointMake(0.0, activeField.frame.origin.y-kbSize.height);
[objTableView setContentOffset:scrollPoint animated:YES];
}
}
// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
objTableView.contentInset = contentInsets;
objTableView.scrollIndicatorInsets = contentInsets;
}
#pragma mark - UITextFieldDelegate protocol method
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
activeField = textField;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
activeField = nil;
}

Answer 1

Try this code:
if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) {
CGRect rc = [activeField bounds];
rc = [activeField convertRect:rc toView:objTableView];
[objTableView scrollRectToVisible:rc animated:YES];
}