title: xcode NSArrayM insertObject:atIndex:]: object cannot be nil
body: <p>I'm new to Xcode. what i want is  read plist data locally in my program. i got 
  <code>NSArrayM insertObject:atIndex:]: object cannot be nil</code> error. Here is what i declared and my plist file. Thanks</p>
  
  <pre><code>NSMutableArray *phoneArray;
  
  NSString *path=[[NSBundle mainBundle] pathForResource:@"PhoneList" ofType:@"plist"];
  
  phoneArray= [[NSMutableArray alloc]initWithContentsOfFile:path];
  </code></pre>
  
  <hr>
  
  <p>key        type
  Item 0     Dictionary
  Item 1     Dictionary</p>
  
  <p>Items have  description, name keys as type of String.</p>