网络状态判断

1. pch文件 / Podfile

#import <AFNetworking.h>
#import <MBProgressHUD.h>


    pod 'AFNetworking', '4.0.1'
    pod 'MBProgressHUD', '~> 1.0.0'

2.Appdelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
........
[CommonTool startMonitoringForNetWork];
.......

3.Common1.h

+(void)startMonitoringForNetWork;
+(BOOL)judgeNetWorkStatusWithoutAlert;
+(BOOL)judgeNetWorkStatus;
+(void)showAlert:(NSString *)title message:(NSString *)message button1:(NSString *)bt1 button2:(NSString *)bt2;
+ (void)showAlert:(NSString *)title message:(NSString *)message button1:(NSString *)bt1 button2:(NSString *)bt2 handler1:(void (^ __nullable)(UIAlertAction *action))handler1 handler2:(void (^ __nullable)(UIAlertAction *action))handler2;

4.Common2.m

#import <NetworkExtension/NetworkExtension.h>

// **************** 网络状态检测 start ***************************************
+(void)startMonitoringForNetWork
{
    AFNetworkReachabilityManager *afNetworkReachabilityManager = [AFNetworkReachabilityManager sharedManager];
    [afNetworkReachabilityManager startMonitoring];  //开启网络监视器；
    
    [afNetworkReachabilityManager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        
        switch (status) {
            case AFNetworkReachabilityStatusNotReachable:{
                
                NSLog(@"网络不通" );
                
                break;
            }
            case AFNetworkReachabilityStatusReachableViaWiFi:{
                
                NSLog(@"网络通过WIFI连接");
//                [SQLiteDemo uploadSavedCbbt];
                
                break;
            }
                
            case AFNetworkReachabilityStatusReachableViaWWAN:{
                
//                [SQLiteDemo uploadSavedCbbt];
                NSLog(@"网络通过蜂窝连接");
                break;
            }
            default:
                break;
        }
        
        
        
        
    }];
}

+(BOOL)judgeNetWorkStatusWithoutAlert
{
    if (![AFNetworkReachabilityManager sharedManager].isReachable) {
        
        return false;
    }
    return true;
}

+(BOOL)judgeNetWorkStatus
{
    
    if (![AFNetworkReachabilityManager sharedManager].isReachable) {
        [self dismissLoading];
        if ([CommonTool.presentingVC isKindOfClass:[UIAlertController class]]) {
            UIAlertController *alertx = (UIAlertController *)CommonTool.presentingVC;
            if ([alertx.title isEqualToString:@"No Internet Connection"]) {
                return false;
            }
        }
        [CommonTool showAlert:@"No Internet Connection" message:@"Make sure your device is connected to the internet" button1:@"OK" button2: nil];
        return false;
    }
    return true;
}
+(void)showAlert:(NSString *)title message:(NSString *)message button1:(NSString *)bt1 button2:(NSString *)bt2
{
    UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:title message:message  preferredStyle:UIAlertControllerStyleAlert];
    if (bt1) {
        [alertVC addAction:[UIAlertAction actionWithTitle:bt1 style:UIAlertActionStyleCancel handler:nil]];
    }
    if (bt2) {
        [alertVC addAction:[UIAlertAction actionWithTitle:bt2 style:UIAlertActionStyleCancel handler:nil]];
        
    }
    
    
    [CommonTool.presentingVC presentViewController:alertVC animated:YES completion:nil];
}

+ (void)showAlert:(NSString *)title message:(NSString *)message button1:(NSString *)bt1 button2:(NSString *)bt2 handler1:(void (^ __nullable)(UIAlertAction *action))handler1 handler2:(void (^ __nullable)(UIAlertAction *action))handler2 {
    UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:title message:message  preferredStyle:UIAlertControllerStyleAlert];
    if (bt1) {
        [alertVC addAction:[UIAlertAction actionWithTitle:bt1 style:UIAlertActionStyleDefault handler:handler1]];
    }
    if (bt2) {
        [alertVC addAction:[UIAlertAction actionWithTitle:bt2 style:UIAlertActionStyleDefault handler:handler2]];
        
    }
    
    [CommonTool.presentingVC presentViewController:alertVC animated:YES completion:nil];
}

/**
 Description:
 
 @return Currently PresentingViewController
 */
+ (UIViewController *)presentingVC{
    UIWindow * window = [CommonTool getAppDelegateWindow];
    if (window.windowLevel != UIWindowLevelNormal){
        NSArray *windows = [[UIApplication sharedApplication] windows];
        for(UIWindow * tmpWin in windows){
            if (tmpWin.windowLevel == UIWindowLevelNormal){
                window = tmpWin;
                break;
            }
        }
    }
    UIViewController *rootViewController = window.rootViewController;
    while (rootViewController.presentedViewController) {
        rootViewController = rootViewController.presentedViewController;
    }
    
    if ([rootViewController isKindOfClass:[UITabBarController class]]) {
        UITabBarController *tabBarController = (UITabBarController *)rootViewController;
        UIViewController *selectedVC=tabBarController.selectedViewController;
        if ([selectedVC isKindOfClass:[UINavigationController class]]) {
            UINavigationController* navigationController = (UINavigationController*)selectedVC;
            return navigationController.visibleViewController;
        }else{
            return  selectedVC;
        }
        
    } else if ([rootViewController isKindOfClass:[UINavigationController class]]) {
        UINavigationController* navigationController = (UINavigationController*)rootViewController;
        return navigationController.visibleViewController;
    } else if (rootViewController.presentedViewController) {
        UIViewController* presentedViewController = rootViewController.presentedViewController;
        return presentedViewController;
    } else {
        return rootViewController;
    }
    
}

+ (UIWindow*)getAppDelegateWindow {
    return [[[UIApplication sharedApplication] delegate] window];
}

+ (void)dismissLoading{
    
    dispatch_async(dispatch_get_main_queue(), ^{
        [MBProgressHUD hideHUDForView:[CommonTool getAppDelegateWindow] animated:YES];
    }) ;
}

// **************** 网络状态检测 End*******************************************

5. 调用

        if(![CommonTool judgeNetWorkStatus]){
            // 无网络
            return;
        }