title: iPhone Wi-Fi transport sequence UI design, has some problem, anyone can help me?
body: <p>Download code here: <a href="http://www.cocoachina.com/bbs/job.php?action=download&amp;aid=12804" rel="nofollow noreferrer">http://www.cocoachina.com/bbs/job.php?action=download&amp;aid=12804</a></p>
  
  <p>I do it like iPhone BlueTooth transporting, but it has some problem.</p>
  
  <p>For example, there are 2 iphones: A and B </p>
  
  <p>Both Press "Search Devices" button, then start to search devices, 
  after getting others, display the target devices list view.</p>
  
  <p>On A iPhone, press the target device name(here is B iPhone), display a waitting view;
  And on B iPhone, display a "decide" view with "accept" and "cancel" button.</p>
  
  <p>if B iPhone select "accept", the "decide" view dismiss, start data transport(in my app, it is same as click "cancel" button); and the same time, on A iphone, the waitting view dismissed.</p>
  
  <p>But! On both devices, in target devices list，</p>
  
  <p>If A and B both press target device name at the same time，and on "decide" view of one device, after press "Cancel" button, some times, the "exc_bad_access" error happend.</p>
  
  <p>The error happend at WifiDeviceListController.m line87</p>
  
  <p>Does any one can help me?</p>
  
  <p>Thank you very much～～</p>