iOS อยากเก็บ Hide Keyboard ใน Simulator กรณี Touch ที่อื่น

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
     UITouch *touch = [touches anyObject];
     if(touch.phase==UITouchPhaseBegan){
         //find first response view
         for (UIView *view in [self.view subviews]) {
             if ([view isFirstResponder]) {
                 [view resignFirstResponder];
                 break;
             }
         }
     }
}

UITapGestureRecognizer *oneTapGesture = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(hideKeyboard:)];
    [oneTapGesture setNumberOfTouchesRequired:1];
    [[self view] addGestureRecognizer:oneTapGesture];

-(void)hideKeyboard:(UITapGestureRecognizer *)sender {
    [txtName resignFirstResponder];
    [txtEmail resignFirstResponder];
    [txtTel resignFirstResponder];
}