re-focus UItextfield after rotation of device - ios

Question

I am reloading my table with reloaddata on rotation of device in my app. If a UITextfield is focused before rotation and keyboard is open , I want it to stay focused and keyboard remains open. Reloaddata calls "textfieldshouldEndEditing" and "KeyboardshouldHide" notifications and thus on rotation my textfield is not focused and keyboard is also closed.
To achieve this I am using the following code:
[myTextfield performSelector:#selector(becomeFirstResponder)
withObject:nil
afterDelay:1.0f];
This works fine and keyboard opens again after rotating the device but the problem is when I press keyboard hide button (now keyboard is closed) and then rotate the device, Keyboard is still showing up which is wrong as before rotating the device I closed it.
Can someone suggest what is wrong or what should be done to achieve this? Thanks

Answer 1

How about just using a BOOL class variable like this:
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
hasKeyboardOpen = YES;
}
// your own method to hide keyboard you would call when user physically hide keyboard
- (void)dismissKeyboard
{
[myTextField resignFirstResponder];
hasKeyboardOpen = NO;
}
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
if(hasKeybaordOpen == YES)
{
[myTextfield performSelector:#selector(becomeFirstResponder)
withObject:nil
afterDelay:1.0f];
}
}

Answer 2

So you before the rotation if the keyboard is visible you it and schedule it to present in 1 second.
I guess the problem is that you schedule the keyboard to present even if it is hidden. If that is the case you should check if the keyboard is visible before performSelector: withObject:afterDelay:
if ([myTextField isFirstResponder]) {
[myTextField resignFirstResponder];
[myTextField performSelector:#selector(becomeFirstResponder) withObject:nil afterDelay:1.];
}
Although I really don't think performSelector: withObject:afterDelay: is the proper way of doing it. You might want to use willRotateToInterfaceOrientation:duration: and didRotateFromInterfaceOrientation: methods instead. You can store the reference to the textField or any other firstResponder (i.e. if you have multiple textFields or textViews:
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
if ([self.myTextFiled isFirstResponder]) {
self.toBeFirstResponderAfterInterfaceOrientationChange = self.myTextFiled;
[self.myTextFiled resignFirstResponder];
}
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
if (self.toBeFirstResponderAfterInterfaceOrientationChange) {
[self.toBeFirstResponderAfterInterfaceOrientationChange becomeFirstResponder];
self.toBeFirstResponderAfterInterfaceOrientationChange = nil;
}
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
self.toBeFirstResponderAfterInterfaceOrientationChange = nil;
}