unrecognized selector sent to instance resignFirstResponder - ios

Question

I'm using TPKeyboardAvoiding in my app to hide move text fields when the keyboard is showing, but I'm getting an exception when I try to end editing the text field. It's coming from this method in TPKeyboardAvoiding:
- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UIView* view =[self TPKeyboardAvoiding_findFirstResponderBeneathView:self];
NSLog(#"%#",[view description]);
[view resignFirstResponder]; //this line gives the exception
[super touchesEnded:touches withEvent:event];
}
I'm a bit confused here. Shouldn't all UIViews respond to resignFirstResponder? Thanks for the help.
Full error:
2014-03-25 17:40:39.919 Rysk[5553:70b] -[MenuViewController textFieldDidBeginEditing:]: unrecognized selector sent to instance 0xb63c820

Answer 1

Not sure if you have called [yourTextField resignFirstResponder] as well. So it is possible that the UITextField (in the code you have provided) is not the FirstResponder at that point. I would suggest to adjust your code like this:
- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UIView* view =[self TPKeyboardAvoiding_findFirstResponderBeneathView:self];
if([view conformsToProtocol:#protocol(UITextFieldDelegate)] || [view conformsToProtocol:#protocol(UITextViewDelegate)]) &&
[view isFirstResponder] && [view canResignFirstResponder])
{
[view resignFirstResponder];
}
[super touchesEnded:touches withEvent:event];
}
Also, if you using PODs please make sure you are using a latest version, because the one i am using has something like this in this event:
- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[[self TPKeyboardAvoiding_findFirstResponderBeneathView:self] resignFirstResponder];
[super touchesEnded:touches withEvent:event];
}
Hope it helps!

Answer 2

Update your code as follows:
- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UIView* view =[self TPKeyboardAvoiding_findFirstResponderBeneathView:self];
NSLog(#"%#",[view description]);
if([view isKindOfClass:[UITextField class]]) {
UITextField *myTextField = (UITextField *)view;
[myTextField resignFirstResponder];
}
[super touchesEnded:touches withEvent:event];
}

Answer 3

Try this simple method....
- (void)viewDidLoad
{
[super viewDidLoad];
//--Gesture to resign keyborad on touch outside
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(dismissKeyboard)];
tap.cancelsTouchesInView = NO;
[self.view addGestureRecognizer:tap];
}
//-- Resign keyboard on touch UIView
-(void)dismissKeyboard
{
self.view.frame = CGRectMake(self.view.frame.origin.x, 0, self.view.frame.size.width, self.view.frame.size.height);
[self.view endEditing:YES];
}

Answer 4

I solved the problem by having my view controller than contains the TPKeyboardAvoidingScrollView implement the UITextFieldDelegate protocol. Most importantly, these two methods:
- (void)textFieldDidBeginEditing:(UITextField *)textField{}
- (void)textFieldDidEndEditing:(UITextField *)textField{}