AFNetworkReachabilityManager*managerAF = [AFNetworkReachabilityManagersharedManager];

[managerAF startMonitoring];

[managerAF setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {

switch(status) {

caseAFNetworkReachabilityStatusUnknown:

[ShowMessage showTextOnly:@"暂时没有网络,请检查网络"messageView:self.view];

break;

caseAFNetworkReachabilityStatusNotReachable:

[ShowMessage showTextOnly:@"暂时没有网络,请检查网络"messageView:self.view];

break;

default:

break;

}

}];