title: how to remove characters from NSString after specific NSString
body: <p>I am having a string as follows</p>
  
  <pre><code>NSString str1 = @"Hello your bal = 68094";
  </code></pre>
  
  <p>and I want to remove all characters after <strong>"="</strong> symbol  encounters in string.</p>
  
  <p>Can any one give me the solution for this?</p>