title: How a get a part of the string from main String in Objective C
body: <p>I have mainString from which i need to get the part of the string after finding a keyword.</p>
  
  <p>NSString *mainString = "Hi how are you GET=dsjghdsghghdsjkghdjkhsg";</p>
  
  <p>now I need to get the string after the keyword "GET=".</p>
  
  <p>Waiting for a reply.</p>