title: how to pause and resume NSTimer in iphone
body: <p>hello
  I am developing small gameApp. 
  I need to pause the timer,when user goes to another view [say settings view]. 
  when user comes back to that view , I need to resume the timer.</p>
  
  <p>can anybody solve this issue ...</p>
  
  <p>Thanks in Advance...</p>