Scrolling UITableView to top doesn't scroll properly - ios

Question

My UIViewController splits to 2:
UIView
UITableView
I've added a footer view to table in order to hide the rest of the table.
Since I cannot use static cells and also hide all bottom view of the table, I did it a bit tricky.
But the table view didn't scroll to top when I tap on my textfields correctly.
The keyboard hides the UITextField and doesn't scroll to correct point.
How can I fix it?
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return 6;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *identifier;
if (indexPath.row == 0) identifier = #"cell_name";
else if (indexPath.row == 1) identifier = #"cell_password";
else if (indexPath.row == 2) identifier = #"cell_password_verify";
else if (indexPath.row == 3) identifier = #"cell_email";
else if (indexPath.row == 4) identifier = #"cell_cellphone";
else if (indexPath.row == 5) identifier = #"cell_social";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier forIndexPath:indexPath];
if (cell == nil) cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
return cell;
}
- (void)configureUI
{
UIView *tableFooterView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth([UIScreen mainScreen].bounds), 1)];
tableFooterView.backgroundColor = [UIColor whiteColor];
self.tableView.tableFooterView = tableFooterView;
tableFooterView.backgroundColor = [UIColor whiteColor];
self.tableView.tableFooterView = tableFooterView;
self.edgesForExtendedLayout = UIRectEdgeNone;
self.extendedLayoutIncludesOpaqueBars = NO;
self.automaticallyAdjustsScrollViewInsets = NO;
}
UPDATE:
Problem was, scroll view cannot scroll because tableFooterView is too short, then I modified my code.
Basically,#Roger Nolan right, I also added the following code and now it works perfect:
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
UITableViewCell *cell = (UITableViewCell *)textField.superview.superview.superview;
[self.tableView scrollToRowAtIndexPath:[self.tableView indexPathForCell:cell] atScrollPosition:UITableViewScrollPositionTop animated:YES];
}
- (void)registerObservers
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardDidShow:)
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardDidHide:)
name:UIKeyboardDidHideNotification
object:nil];
}
- (void)keyboardDidShow:(NSNotification *)notification
{
CGFloat keyboardHeight = [CoreGraphicsHandler keyboardFramFromNotification:notification].size.height;
UIView *tableFooterView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth([UIScreen mainScreen].bounds), keyboardHeight)];
tableFooterView.backgroundColor = [UIColor whiteColor];
self.tableView.tableFooterView = tableFooterView;
}
- (void)keyboardDidHide:(NSNotification *)notification
{
UIView *tableFooterView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth([UIScreen mainScreen].bounds), 1)];
tableFooterView.backgroundColor = [UIColor whiteColor];
self.tableView.tableFooterView = tableFooterView;
}

Answer 1

You need to make the controller a delegate of your text fields and then send the tableview scrollToRowAtIndexPath:atScrollPosition: animated:
See this exact dupe: Making a UITableView scroll when text field is selected

Answer 2

I had a similar problem and, as suggested by Idan Moshe in the update, I solved inserting a footerView in my tableView.
The solution in Swift 4:
func registerObservers(){
NotificationCenter.default.addObserver(self, selector: #selector(keyboardDidShow), name: NSNotification.Name.UIKeyboardDidShow, object: nil);
NotificationCenter.default.addObserver(self, selector: #selector(keyboardDidHide), name: NSNotification.Name.UIKeyboardDidHide, object: nil);
}
#objc func keyboardDidShow(_ notification: Notification) {
DispatchQueue.main.async {
if let keyboardFrame: NSValue = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue {
let keyboardHeight = keyboardFrame.cgRectValue.height;
let tableFooterView = UIView.init(frame: CGRect.init(x: 0, y: 0, width: UIScreen.main.bounds.width, height: keyboardHeight))
self.tableView.tableFooterView = tableFooterView;
}
}
}
#objc func keyboardDidHide(_ notification: Notification) {
DispatchQueue.main.async {
let tableFooterView = UIView.init(frame: CGRect.init(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 1));
self.tableView.tableFooterView = tableFooterView;
}
}
func textFieldDidBeginEditing(_ textField: UITextField) {
let cell = self.selectedTExtField?.superview?.superview;
if let idxPath = self.tableView.indexPath(for: cell){
self.tableView.scrollToRow(at: idxPath, at: .top, animated: true);
}
else{
print("Error: index path not found");
}
}