Static Table View - UITextField hidden by Keyboard - ios

Question

Maybe this is a recurrent question, but I got stuck with this issue and some iOS concepts. I have a ViewController with a Static Table View, Three Sections and some Rows on Each Section. Inside the rows I have UITextFields. What I’m trying to do is preventing the keyboard to hide my bottom screen UI Text Fields. I’ve just tried an apple solution from Managing the Keyboard, but since I'm not getting the concept behind the scroll view attached to a static table view, I couldn't implement the idea into my project. Do you guys recommend anyplace to learn it? Sorry if couldn't explain what I'm trying to do. I'm a little lost.
Any help will be appreciated.
Many thanks,
Marcos.

Answer 1

I've had to do something similar, here's my code, hopefully it helps you.
- (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);
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
CGRect aRect = self.bounds;
aRect.size.height -= kbSize.height;
CGRect activeRect = [activeTextField convertRect:activeTextField.frame toView:self];
if (!CGRectContainsPoint(aRect, activeRect.origin) ) {
CGPoint scrollPoint = CGPointMake(0.0, activeRect.origin.y-kbSize.height+10);
[scrollView setContentOffset:scrollPoint animated:YES];
}
}
// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
self.activeTextField = textField;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
self.activeTextField = nil;
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return NO;
}
Also, make sure to set your notification observers when loading your view, like this:
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification object:nil];
Just define activeTextField as a UITextField and make sure everything you want to move is contained in your scrollView (in your case you can probably change your viewController to a scrollView). Also, make sure your scrollView's contentSize is at least self.bounds.size.
Hope this helps.

Answer 2

I just had to do this in my application - Stakenborg's answer got me 80% there, but there were a couple of additional refinements I added to work with TableViews specifically.
The main bits are that:
TableViews already have insets, so we need to add or subtract from those.
I also want to scroll so that the cell I'm editing is in a good place to be seen.
The second part requires a little bit of indirection - the text fields belong to my custom cells, so I need to respond to the BeginEditing message there by sending a message to the UITableViewController.
Here's how it all comes together. In the UITableViewController:
#property (nonatomic, strong) NSIndexPath *editCellIndexPath;
#property (nonatomic) bool keyboardShowing;
//....
- (void)setEditRow:(UITableViewCell *)cell
{
self.editCellIndexPath = [self.tableView indexPathForCell:cell];
if (self.keyboardShowing)
{
[self.tableView scrollToRowAtIndexPath:self.editCellIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:true];
}
}
- (void)keyboardWillShow:(NSNotification *)sender
{
CGSize kbSize = [[[sender userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
NSTimeInterval duration = [[[sender userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
UIEdgeInsets edgeInsets = [self.tableView contentInset];
edgeInsets.bottom += kbSize.height;
UIEdgeInsets scrollInsets = [self.tableView scrollIndicatorInsets];
scrollInsets.bottom += kbSize.height;
self.keyboardShowing = true;
[UIView animateWithDuration:duration animations:^{
[self.tableView setContentInset:edgeInsets];
[self.tableView setScrollIndicatorInsets:scrollInsets];
}];
}
- (void)keyboardWillHide:(NSNotification *)sender
{
CGSize kbSize = [[[sender userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
NSTimeInterval duration = [[[sender userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
UIEdgeInsets edgeInsets = [self.tableView contentInset];
edgeInsets.bottom -= kbSize.height;
UIEdgeInsets scrollInsets = [self.tableView scrollIndicatorInsets];
scrollInsets.bottom -= kbSize.height;
self.keyboardShowing = false;
[UIView animateWithDuration:duration animations:^{
[self.tableView setContentInset:edgeInsets];
[self.tableView setScrollIndicatorInsets:scrollInsets];
}];
}
Then I have a weak property for the owningController in each of my custom UITableViewCells, and let the controller know when my cell is being text-edited. I use a TextView in one, and TextFields in another row, so I use these methods:
- (void)textViewDidBeginEditing:(UITextView *)textView
{
MyCustomTableController *itemControl = (MyCustomTableController *)self.owningController;
[itemControl setEditRow:self];
}
and
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
MyCustomTableController *itemControl = (MyCustomTableController *)self.owningController;
[itemControl setEditRow:self];
}
So far, this is working very well.