在日常的app开发中,我们会根据网络的不同状态,做不同的事情,也会当网络断开时,给弹出框提示,这样更好的提醒用户当前的网络状态,避免用户浪费流量,也增加用户的使用舒服感.
在开发过程中,我们一般使用AFNetworking这个三方库请求接口数据,下面我想分享的是使用AFNetworking在appDelegate.m中写个方法直接实时监测网络状态,并获得断网之后的提示,很简单的代码,只需要复制粘贴即可,本人已经测试过了
在AppDelegate.m中引用头文件

import "AFNetworking.h"

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
   ....
    [self networkingState];
   ....
    return YES;
}

- (void)networkingState {
    [[AFNetworkReachabilityManager sharedManager] startMonitoring];
    [[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        switch (status) {
            case -1:
                NSLog(@"未知网络");
                break;
            case 0:
                NSLog(@"网络不可达");
                break;
            case 1:
                NSLog(@"GPRS网络");
                break;
            case 2:
                NSLog(@"wifi网络");
                break;
            default:
                break;
        }
        
        if(status ==AFNetworkReachabilityStatusReachableViaWWAN || status == AFNetworkReachabilityStatusReachableViaWiFi)
        {
            NSLog(@"有网");
        } else {
            NSLog(@"没有网");
            UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"网络失去连接" message:nil preferredStyle:UIAlertControllerStyleAlert];
            UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
            }];
            [alertVC addAction:cancelAction];
            //初始化UIWindows
            UIWindow *AW = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
            AW.rootViewController = [[UIViewController alloc]init];
            AW.windowLevel = UIWindowLevelAlert + 1;
            [AW makeKeyAndVisible];
            [AW.rootViewController presentViewController:alertVC animated:YES completion:nil];
        }
    }];
}