1、在專案中的info.plist中新增URL Types並設定一項URL Schemes為prefs.如下圖:

2、該上程式碼了

[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        NSLog(@"status=%@",[AFNetworkReachabilityManager sharedManager].localizedNetworkReachabilityStatusString
 
);
        if (status==AFNetworkReachabilityStatusNotReachable) {
            UIAlertController *alert=[UIAlertController alertControllerWithTitle:@"提示" message:@"網路未連線" preferredStyle:UIAlertControllerStyleAlert];
            UIAlertAction *cancelAction=[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
            }];
            UIAlertAction *jumpAction=[UIAlertAction actionWithTitle:@"連線"
 
 style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
                NSURL *url=[NSURL URLWithString:@"prefs:root=WIFI"];
                if ([[UIApplication sharedApplication] canOpenURL:url]) {
                    [[UIApplication sharedApplication] openURL:url];
                }
            }];
            [alert addAction:cancelAction];
            [alert addAction:jumpAction];
            [self
 
 presentViewController:alert animated:YES completion:nil];
        }else{
            UIAlertController *alert=[UIAlertController alertControllerWithTitle:@"" message:@"網路已連線" preferredStyle:UIAlertControllerStyleAlert];
            UIAlertAction *okAction=[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
            }];
            [alert addAction:okAction];
            [self presentViewController:alert animated:YES completion:nil];
        }
    }];
    [[AFNetworkReachabilityManager sharedManager] startMonitoring];