选择提示框UIAlertController 和网络状态判断AFNetworking

// 选择提示框

            DownloadView *vc = [[DownloadView alloc] initWithFrame:CGRectMake(, , SCREEN_WIDTH, SCREEN_HEIGHT)];

            [vc show];

            UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示"

                                                                                     message:@"当前GPRS网络,确定要下载吗？"

                                                                              preferredStyle:UIAlertControllerStyleAlert ];

            //添加取消到UIAlertController中

            UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

                NSLog(@"选择了取消");

            }];

            [alertController addAction:cancelAction];

            //添加确定到UIAlertController中

            UIAlertAction *OKAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

                NSLog(@"选择了确定");

            }];

            [alertController addAction:OKAction];

            [self presentViewController:alertController animated:YES completion:nil];

            // 网络状态

            [[AFNetworkReachabilityManager sharedManager] startMonitoring];

            [[AFNetworkReachabilityManager sharedManager ] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {

                switch (status) {

                    case -:

                        NSLog(@"未知网络");

                        break;

                    case :

                        NSLog(@"网络不可达");

                        break;

                    case :

                        NSLog(@"GPRS网络");

                        break;

                    case :

                        NSLog(@"wifi网络");

                        break;

                    default:

                        break;

                }

                if(status ==AFNetworkReachabilityStatusReachableViaWWAN || status == AFNetworkReachabilityStatusReachableViaWiFi)

                {

                    NSLog(@"有网");

                }else

                {

                    NSLog(@"没有网");

                    UIAlertController *notNetWorking = [UIAlertController alertControllerWithTitle:@"提示"

                                                                                           message:@"网络失去连接"

                                                                                    preferredStyle:UIAlertControllerStyleAlert ];

                    //添加取消到UIAlertController中

                    UIAlertAction *cancelClick = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

                        NSLog(@"选择了取消");

                    }];

                    [notNetWorking addAction:cancelClick];

                    [self presentViewController:notNetWorking animated:YES completion:nil];

                }

            }];