提示网络状况

NetworkReachability.m

#import <AFNetworkReachabilityManager.h>
#import <MBProgressHUD.h>

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    
    
    // 当前网络连接情况
    AFNetworkReachabilityManager *afNetworkReachabilityManager = [AFNetworkReachabilityManager sharedManager];
    
    [afNetworkReachabilityManager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        
        switch (status) {
            case AFNetworkReachabilityStatusNotReachable:{
                MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.window animated:YES];
                hud.labelText = @"网络连接不可用，请稍候重试";
                [hud show:YES];
                [hud hide:YES afterDelay:3];
                NSLog(@"Block says Network unreachable");
                break;
            }
            case AFNetworkReachabilityStatusReachableViaWiFi:{
                NSLog(@"AFNetworkReachabilityStatusReachableViaWiFi");
                break;
            }
                
            case AFNetworkReachabilityStatusReachableViaWWAN:{
                break;
                NSLog(@"AFNetworkReachabilityStatusReachableViaWWAN");
            }
            default:
                break;
        }
    }];
    
    [afNetworkReachabilityManager startMonitoring];
    
    
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    
    

    
    return YES;
}