title: how to calculate immediately as soon as typing in uitextfield in iphone?
body: <p>i have a view and i want functionality something like this..</p>
  
  <p>first UITextfield is price for ex- 10000
  second UItextField precentage for ex-70</p>
  
  <p>third UIlabel which will show the result for ex- $ 7,000.00</p>
  
  <p>i want this and also as soon as i type 7 the result label should show $ 700.00</p>