只要网络状态发生了变化，在任何一个视图控制器都会给出相应的提示
说明： 这里需要导入第三方库，1. MBProgressHUD 2. AFNetworking
导入头文件 MBProgressHUD.h, AFNetworking.h
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// 应用程序加载完成
UIWindow *window = ((AppDelegate *) [UIApplication sharedApplication].delegate).window;
AFNetworkReachabilityManager *manager = [AFNetworkReachabilityManager sharedManager];
[manager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
// 使用MBProgressHUD三方库创建弹框，给出相应的提示
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:window animated:YES];
hud.mode = MBProgressHUDModeText;
switch (status) {
case AFNetworkReachabilityStatusNotReachable:
// 弹框提示的内容
hud.labelText = @"世界上最遥远的距离就是没网";
break;
case AFNetworkReachabilityStatusReachableViaWWAN:
hud.labelText = @"2G/3G/4G";
break;
case AFNetworkReachabilityStatusReachableViaWiFi:
hud.labelText = @"WiFi在线";
default:
break;
}
dispatch_async(dispatch_get_global_queue(0, 0), ^{
// 显示时间2s
sleep(2);
dispatch_async(dispatch_get_main_queue(), ^{
// 让弹框消失
[MBProgressHUD hideHUDForView:window animated:YES];
});
});
}];
[manager startMonitoring];
return YES;
}
