// 判断是否有网络
Reachability *netWorkStatus = [Reachability reachabilityForInternetConnection];
if (netWorkStatus.currentReachabilityStatus != NotReachable) {
[self loadData];
} else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"当前网络不稳定" message:nil delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
[self.view addSubview:alert];
[alert show];
return;
}
