在 OS X 中检测已安装的 USB 设备

Question

所以我试图在我的 Mac Mini 上检测 OS X 中已安装和未安装的 USB 设备

我已按照其他指南进行操作，但我似乎没有收到任何通知。

这是我拥有的代码，我也尝试将其放置在视图控制器类中，但无济于事。

@implementation AppDelegate

- (void)deviceMounted: (NSNotification *) notification
{
    NSLog(@"Mounted");
}
- (void)deviceUnmounted: (NSNotification *) notification
{
    NSLog(@"Unmounted");
}

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
   NSNotificationCenter *notificationCenter2 = [[NSWorkspace sharedWorkspace] notificationCenter];

    // Notification for Mountingthe USB device
    [notificationCenter2 addObserver:self selector:@selector(deviceMounted:)  name:NSWorkspaceDidMountNotification object:nil];

    // Notification for Un-Mountingthe USB device
    [notificationCenter2 addObserver:self selector:@selector(deviceUnmounted:)  name:NSWorkspaceDidUnmountNotification object:nil];
}

Answer 1

您的代码尝试记录的方式不正确，NSLog 是您需要的：

- (void)deviceMounted: (NSNotification *) notification
{
    NSLog(@"Mounted");
}
- (void)deviceUnmounted: (NSNotification *) notification
{
    NSLog(@"Unmounted");
}

结果：

2015-02-27 04:07:00.593 notify[32431:16256290] Mounted
2015-02-27 04:07:11.587 notify[32431:16256290] Unmounted