iOS开发之 app网络实时监测

Posted 2020-07-22

1.在

#import "AppDelegate.h"

{

    Reachability *hostReach;

}

2.在

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {}里

    //监测网络情况

    [[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(reachabilityChanged:)

                                                 name: kReachabilityChangedNotification

                                               object: nil];

    //初始化Reachability类，并添加一个监测的网址。

    hostReach = [Reachability reachabilityWithHostName:@"https://www.baidu.com"];

    //开始监测

    [hostReach startNotifier];

3.

#pragma mark - 监测网络情况，当网络发生改变时会调用

- (void)reachabilityChanged:(NSNotification *)note {

    Reachability* curReach = [note object];

    NSParameterAssert([curReach isKindOfClass: [Reachability class]]);

    NetworkStatus status = [curReach currentReachabilityStatus];

    

    if (status == NotReachable) {

        //初始化提示框；

        UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"是否清理缓存" preferredStyle: UIAlertControllerStyleAlert];

        

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

            //点击按钮的响应事件；

            

         }]];

        

        //弹出提示框；

        [self.window.rootViewController presentViewController:alert animated:true completion:nil];

 

    }

    

}