title: UITextView setBorderStyle crashes in iOS 5 Simulator
body: <p>I have a strange situation in one view controller where this line crashes in the iOS 5 simulator:</p>
  
  <pre><code>   // myTextField is created in a NIB
     myTextField.borderStyle = UITextBorderStyleNone;
  </code></pre>
  
  <p>It's okay in the device (and both device and simulator on iOS 4.3).  I've checked the connections in the NIB (even deleted and reconnected).  myTextField has a retainCount of 2 at this point in the code.  I'm setting other attributes (e.g., "text" and "userInteractionEnabled" prior to this point, and those do not cause a crash.</p>
  
  <p>However, if I use this sequence, it does not crash:</p>
  
  <pre><code>   myTextField.borderStyle = 4; // not a defined border style
     myTextField.borderStyle = UITextBorderStyleNone;
  </code></pre>
  
  <p>If I use 1, 2, or 3 (defined styles) instead of "4" (an undefined border style), it crashes.  "7" works.</p>
  
  <p>In my other view controllers, I have similar textViews, and no problem setting the borderStyle to UITextBorderStyleNone.</p>
  
  <p>Edit: Here's the backtrace:</p>
  
  <pre><code>Thread 1, Queue : (null)
  #0  0x01e0609b in objc_msgSend ()
  #1  0x005c1c22 in -[UIView(Hierarchy) _setBackgroundColor:] ()
  #2  0x005c3a06 in -[UIView(Rendering) setBackgroundColor:] ()
  #3  0x0063eab7 in -[UITextField setBackgroundColor:] ()
  #4  0x0063e1b6 in -[UITextField setBorderStyle:] ()
  #5  0x000c23e6 in -[DutyEditViewController viewWillAppear:] at /Users/jeff/Applications/iPhone/MyApp/Classes/DutyEditViewController.m:197
  #6  0x00651fbf in -[UIViewController _setViewAppearState:isAnimating:] ()
  #7  0x0065221b in -[UIViewController __viewWillAppear:] ()
  #8  0x006524c3 in -[UIViewController beginAppearanceTransition:animated:] ()
  #9  0x00662b71 in -[UINavigationController _startTransition:fromViewController:toViewController:] ()
  #10 0x006633df in -[UINavigationController _startDeferredTransitionIfNeeded] ()
  #11 0x00663986 in -[UINavigationController pushViewController:transition:forceImmediate:] ()
  #12 0x0c894dbd in -[UINavigationControllerAccessibility(SafeCategory) pushViewController:transition:forceImmediate:] ()
  #13 0x006635a4 in -[UINavigationController pushViewController:animated:] ()
  #14 0x000bf99a in -[DutiesTableViewController tableView:didSelectRowAtIndexPath:] ()
  #15 0x0061a71d in -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] ()
  #16 0x0061a952 in -[UITableView _userSelectRowAtPendingSelectionIndexPath:] ()
  #17 0x0025386d in __NSFireDelayedPerform ()
  #18 0x020dc966 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ ()
  #19 0x020dc407 in __CFRunLoopDoTimer ()
  #20 0x0203f7c0 in __CFRunLoopRun ()
  #21 0x0203edb4 in CFRunLoopRunSpecific ()
  #22 0x0203eccb in CFRunLoopRunInMode ()
  #23 0x0258a879 in GSEventRunModal ()
  #24 0x0258a93e in GSEventRun ()
  #25 0x0058aa9b in UIApplicationMain ()
  #26 0x0006117d in main ()
  #27 0x00002c65 in start ()
  </code></pre>
  
  <p>I notice that the setBorderStyle: is doing a setBackgroundColor:, so changed my code to this:</p>
  
  <pre><code>myTextField.backgroundColor = [UIColor clearColor];
  myTextField.borderStyle = UITextBorderStyleNone;
  </code></pre>
  
  <p>and the crash no longer happens.  But, the background color is being set to "Clear Color" in the NIB.</p>
  
  <p>So, the crash is gone, but the mystery of why I must set the background color (even though the NIB is already doing that) remains.</p>