UITextField Delegate Methods for Show Hide Keyboard with Animation.

 These delegate methods will automatically call according to the trigger.

Code for .h Controller. 


@interface UIController : UIViewController <UITextFieldDelegate>{

}

-(void)setViewMovedUp:(BOOL)movedUp;

Code for .m Controller.
 
- (void)viewWillAppear:(BOOL)animated{
   
    // watch the keyboard so we can adjust the user interface if necessary.
    [[NSNotificationCenter defaultCenter ] addObserver:self selector:@selector(keyboardWillShow:)
                                                  name:UIKeyboardWillShowNotification object:self.view.window];
    [[NSNotificationCenter defaultCenter ] addObserver:self selector:@selector(keyboardWillHide:)
                                                  name:UIKeyboardWillHideNotification object:self.view.window];
   
}

- (void)viewWillDisappear:(BOOL)animated{
   
    [self setEditing:NO animated:YES];
    // unregister for keyboard notifications while not visible.
   
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}

#pragma mark - UIViewController delegate methods

- (void) keyboardWillShow:(NSNotification *)notif{
    // The keyboard will be shown. If the user is editing the comments, adjust the display so that the
    // comments field will not be covered by the keyboard.
    if((txtCity.editing==TRUE) || (txtTwitterID.editing==TRUE) || (txtTwitterPassword.editing==TRUE) || (txtFacebookID.editing==TRUE) || (txtFacebookPassword.editing==TRUE) || (txtPostalCode.editing == TRUE) || (txtState.editing == TRUE) || (txtCountry.editing == TRUE) || (txtTeamName.editing==TRUE)){
       
    }
    else {
        [self setViewMovedUp:YES];
    }
}

- (void) keyboardWillHide:(NSNotification *)notif{
    // The keyboard will be hidden.
    // view should be shifted donw to its real position.
    [self setViewMovedUp:NO];
}

-(void)textViewDidBeginEditing:(UITextView *)textView{
   
    [self setViewMovedUp:YES];
}
-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
   
    if([text isEqualToString:@"\n"]) {
        [txtViewDescription resignFirstResponder];
        [self setViewMovedUp:NO];
        return NO;
    }   
    return NO;
}

- (void)textFieldDidBeginEditing:(UITextField *)textField{
    // The keyboard will be shown. If the user is editing the comments, adjust the display so that the
    // comments field will not be covered by the keyboard.
    if((txtCity.editing==TRUE) || (txtTwitterID.editing==TRUE) || (txtTwitterPassword.editing==TRUE) || (txtFacebookID.editing==TRUE) || (txtFacebookPassword.editing==TRUE) || (txtPostalCode.editing == TRUE) || (txtState.editing == TRUE) || (txtCountry.editing == TRUE) || (txtTeamName.editing==TRUE)){
       
    }
    else {
        [self setViewMovedUp:YES];
    }
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField{   
    [txtCity resignFirstResponder];
    [txtTwitterID resignFirstResponder];
    [txtPostalCode resignFirstResponder];
    [txtTwitterPassword resignFirstResponder];
    [txtState resignFirstResponder];
    [txtFacebookID resignFirstResponder];
    [txtFacebookPassword resignFirstResponder];
    [txtCountry resignFirstResponder];
    [txtAdministratorName resignFirstResponder];
    [txtFlickrID resignFirstResponder];
    [txtAdminEmailID resignFirstResponder];
    [txtFlickrPassword resignFirstResponder];
    [txtNumberOfDivisions resignFirstResponder];
    [txtLevels resignFirstResponder];
    [self setViewMovedUp:NO];
    return NO;
}

- (void)setViewMovedUp:(BOOL)movedUp{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];
    // Make changes to the view's frame inside the animation block. They will be animated instead
    // of taking place immediately.
    CGRect rect = self.view.frame;
    if (movedUp){       
        if(rect.origin.y == 0)
            rect.origin.y = self.view.frame.origin.y - 216;
    }
    else{       
        if(rect.origin.y < 0)
            rect.origin.y = self.view.frame.origin.y + 216;
    }   
    self.view.frame = rect;   
    [UIView commitAnimations];
}