title: Find one string in another with case insensitive in Objective-C
body: <p>My question is similar to <a href="https://stackoverflow.com/q/2753956/602011">How do I check if a string contains another string in Objective-C?</a></p>
  
  <p>How can I check if a string (NSString) contains another smaller string but with ignoring case?</p>
  
  <pre><code>NSString *string = @"hello bla bla";
  </code></pre>
  
  <p>I was hoping for something like:</p>
  
  <pre><code>NSLog(@"%d",[string containsSubstring:@"BLA"]);
  </code></pre>
  
  <p>Anyway is there any way to find if a string contains another string with ignore case ? But please do not convert both strings to UpperCase or to LowerCase.</p>