Question

是否可以检测硬件更改？我正在寻找更改网络适配器时发送的更新通知（即当用户取消其MacBook时）。

我已经用Google搜索，但无法找到任何内容。

Answer 1

我使用过#import <AFNetworking/AFNetworkReachabilityManager.h> - (instancetype)init { self = [super init]; if( self ) { [[AFNetworkReachabilityManager sharedManager] startMonitoring]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:AFNetworkingReachabilityDidChangeNotification object:nil]; } return self; } -(void) dealloc { [[NSNotificationCenter defaultCenter] removeObserver:self name:AFNetworkingReachabilityDidChangeNotification object:nil]; }，发现它最容易使用（监听适配器更改）

- (void)reachabilityChanged:(NSNotification *)notification
{
   NSNumber *s = notification.userInfo[AFNetworkingReachabilityNotificationStatusItem];
   AFNetworkReachabilityStatus status = [s integerValue];

   //Check value of status here
}

然后实现处理程序：

   #import <SystemConfiguration/SystemConfiguration.h>

   BOOL networkAvailable = NO;
   const char *hostName = [NEVER_TRANSLATE(@"google.com") cStringUsingEncoding:NSASCIIStringEncoding];
   SCNetworkReachabilityFlags flags = 0;
   SCNetworkReachabilityRef target = SCNetworkReachabilityCreateWithName(NULL, hostName);

   if (SCNetworkReachabilityGetFlags(target, &flags))
   {
      if (flags == kSCNetworkFlagsReachable)
      {
         networkAvailable = YES;
      }
   }

这是标题，您可以在其中查看用于状态的常量： https://github.com/AFNetworking/AFNetworking/blob/4fb051898c60051d207ca0c24435766fdf140e34/AFNetworking/AFNetworkReachabilityManager.h

我还使用了SCReachability

Dim textToLookAt = txtPartNum.Text
If Not (System.Text.RegularExpressions.Regex.IsMatch(textToLookAt, "^[0-9]{2}[A-Za-z]{2}")) Then
    MessageBox.Show("Error: Part number must contain two numbers followed by two letters. first")
    blnValid = False
End If

虽然我用这个来检测特定时间的网络可用性，而不是注册为监听器，所以不确定这是否能达到你想要的效果

检测硬件/网络适配器更改

1 个答案: