title: UIKeyboard not appearing when tapping on UITextField
body: <p><img src="https://i.stack.imgur.com/uG0XS.png" alt="This is the Signup VC ,as Tapping pops the white space Not the KeyBoard"><img src="https://i.stack.imgur.com/MIspK.png" alt="This is the login VC ,as Tapping pops the white space Not the KeyBoard"></p>
  
  <p>I had been into a weird problem, As every other thing is working fine. All of sudden when I compile my application and got this problem, when I tapped on the <code>UITextField</code> white space is popping up, but the keyboard is not visible and I am not able to enter anything.</p>