集成环信的单聊功能，[EaseMob sharedInstance]报错

集成环信的单聊功能，[EaseMob sharedInstance]这个报错，具体错误如下, 请大神帮忙。
 
调用的代码
[[EaseMob sharedInstance] registerSDKWithAppKey:appkey
                                           apnsCertName:apnsCertName
                                            otherConfig:@{kSDKConfigEnableConsoleLogger:[NSNumber numberWithBool:YES]}];
 
错误信息：
2015-06-22 19:56:02.142 testhx[15905:265946] -[EMDeviceManager _setupNetworkMonitor]: unrecognized selector sent to instance 0x7ffb8a4349c0

2015-06-22 19:56:02.145 testhx[15905:265946] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[EMDeviceManager _setupNetworkMonitor]: unrecognized selector sent to instance 0x7ffb8a4349c0'