在切换案例中枚举崩溃时收集变异

Question

我正在使用库SRWebSocket，我遇到了以下崩溃： 似乎没有循环，除了调用handleMessage的主要SRWebSocket循环：

{"BranchByList":
[
{"id":"342","flag_image":"http:\/\/demo.techzarinfo.com\/newant‌​ara\/images\/flags\/USD.png","units":"1","code":"USD B","currency":"US DOLLAR BIG","buy":"4.36","sell":"4.395","updated":"2016-04-11 03:24:24"
},
{"id":"342","flag_image":"http:\/\/demo.techzarinfo.com\/newantara\/i‌​mages\/flags\/USD.png","units":"1","code":"USD B","currency":"US DOLLAR BIG","buy":"4.36","sell":"4.395","updated":"2016-04-11 03:24:24"
}
]};

首先在SRWebSocket中调用：

Fatal Exception: NSGenericException
*** Collection <_NSFaultingMutableSet: 0x14f60ced0> was mutated while being enumerated.

Fatal Exception: NSGenericException
0  CoreFoundation                 0x181e0ae38 __exceptionPreprocess
1  libobjc.A.dylib                0x18146ff80 objc_exception_throw
2  CoreFoundation                 0x181e0a86c -[NSException name]
3  Appname                         0x1002507b0 -[WebSocketClient notification:] (WebSocketClient.m:534)
4  Appname                         0x10024fa68 -[WebSocketClient webSocket:didReceiveMessage:] (WebSocketClient.m:223)
5  Appname                         0x10017c260 __30-[SRWebSocket _handleMessage:]_block_invoke (SRWebSocket.m:741)
6  libdispatch.dylib              0x1818554bc _dispatch_call_block_and_release
7  libdispatch.dylib              0x18185547c _dispatch_client_callout
8  libdispatch.dylib              0x18185ab84 _dispatch_main_queue_callback_4CF
9  CoreFoundation                 0x181dc0dd8 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
10 CoreFoundation                 0x181dbec40 __CFRunLoopRun
11 CoreFoundation                 0x181ce8d10 CFRunLoopRunSpecific
12 GraphicsServices               0x1835d0088 GSEventRunModal
13 UIKit                          0x186fbdf70 UIApplicationMain
14 Appname                         0x1003201e4 main (AppDelegate.swift:18)
15 libdispatch.dylib              0x1818868b8 (Missing)

• 委托类WebSocketClient -

第一个函数调用：

- (void)_handleMessage:(id)message
{
    SRFastLog(@"Received message");
    [self _performDelegateBlock:^{
        [self.delegate webSocket:self didReceiveMessage:message];
    }];
}

第二个电话：

- (void)webSocket:(SRWebSocket *)webSocket didReceiveMessage:(id)message
{

  NSDictionary *dict = [message objectFromJSONString];
  int code = [[dict objectForKey:@"msgCode"] intValue];
  MessageType messageType = [[dict objectForKey:@"msgType"] intValue];

  if (self.loginBlock != nil && _autoLogining == NO) {

    [self feedbackLoginblock:dict];

    [self sendToken];
  }else{
    switch (messageType) {
      case MessageTypeReply:
      {
        NSString *matchIdentify = [dict objectForKey:@"msgId"];
        [self checkWaitingBlockQueue:matchIdentify code:code message:dict];
      }
        break;
      case MessageTypeReceiveMessage:{
        [self parseReadMessageFeedback:dict];
        NSInteger receiveInt = self.receiveNumber.intValue;
        receiveInt ++;
        self.receiveNumber = [NSNumber numberWithInteger:receiveInt];
      }
        break;
      case MessageTypeAddGroup:{
        [self addMemberToGroup:dict];
      }
        break;
      case MessageTypeDeleteGroup:{
        [self deleteMemberFromGroup:dict];
      }
        break;
      case MessageTypeNotifyMsgType:{
        NSDictionary *content = [dict objectForKey:@"datacontent"];
        [self notification:content]; <<< LINE 223
      }
   }
}

通知更新：方法

- (void)sendMessage:(Message *)message resultBlock:(MessageReplyBlock )block
{

  MessageBlock *messageBlock = [self createMessageBlock:block];
  [_waitingBlockQueue addObject:messageBlock];

  NSNumber *push;
  if(message.belongToSession.withSomebody) {

    push = [NSNumber numberWithInt:1];
  }else{
    push = [NSNumber numberWithInt:0];

  }
  NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                               messageBlock.matchMessageID, @"matchID",
                               message.messageType, @"msgType",
                               message.sourceType, @"msgSourceT",
                               message.textContent, @"msgTextContent",
                               _currentUser.contactID, @"from",
                               push, @"push",
                               nil];
  MessageType messageType = [message.messageType integerValue];
  MessageSourceType sourceType = [message.sourceType integerValue];
  NSNumber *toContactID = message.toUser.contactID;
  if (toContactID == nil) {
    return;
  }

  if ([message.whisperType isEqualToNumber:@1]) {
    [dict setObject:@1 forKey:@"option"];
    [dict setObject:message.whisperTimeCount forKey:@"msgTimer"];
  }

  switch (messageType) {
    case MessageTypeImage:
    {
      [dict setObject:message.bigImagePath forKey:@"msgBigsrc"];
      [dict setObject:message.smallImagePath forKey:@"msgSmallsrc"]; <<< LINE 534
    }
      break;
    case MessageTypeOfflineAudio:
    {
      [dict setObject:message.webSourcePath forKey:@"msgUrl"];
      [dict setObject:message.voiceTime forKey:@"msgVoiceTime"];

    }
      break;
    case MessageTypeMap:
    {
      NSString *latitude = [message.latitude stringValue];
      NSString *longitude = [message.longitude stringValue];

      if (latitude.length > 0 && longitude.length > 0) {
        [dict setObject:latitude forKey:@"lat"];
        [dict setObject:longitude forKey:@"lng"];
      }
    }
      break;

    default:
      break;
  }

  switch (sourceType) {
    case MessageSourceTypeP2p:
    {
      [dict setObject:toContactID forKey:@"to"];
    }
      break;
    case MessageSourceTypeGroup:
    {
      [dict setObject:toContactID forKey:@"gid"];
    }
      break;
    default:
      break;
  }

  NSData *data = [NSJSONSerialization dataWithJSONObject:dict options:0 error:nil];

  if(isConnected)
    [_webSocket send:data];
  else
    [self reconnect];
}