title: iOS Convert NSString to NSDate alway nil
body: <p>I'm trying to convert string to <code>NSdate</code>. The string date is "<strong>12/27/2014 07:42:00 AM +0000</strong>"</p>
  
  <p>Here is my code:</p>
  
  <pre><code>NSDate *date =[[NSDate alloc] init];
  NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
  dateFormatter.dateFormat = @"MM/dd/yyyy HH:mm:ss a";
  date = [ dateFormatter dateFromString:dateString];
  </code></pre>
  
  <p>The date value is always nil. Any of you knows what canI be doing wrong?</p>
  
  <p>I'll really appreaciate your help.</p>