//基于block處理的通知注冊(cè)
uint32_t notify_register_dispatch(const char *name, int *out_token, dispatch_queue_t queue, notify_handler_t handler)

//基于信號(hào)處理的通知注冊(cè)
uint32_t notify_register_signal(const char *name, int sig, int *out_token);

//基于mach port消息的通知注冊(cè)
uint32_t notify_register_mach_port(const char *name, mach_port_t *notify_port, int flags, int *out_token);

//基于文件描述符的通知注冊(cè)。
uint32_t notify_register_file_descriptor(const char *name, int *notify_fd, int flags, int *out_token);

 uint32_t notify_post(const char *name);

//通知的暫停，設(shè)置后此token將暫時(shí)不會(huì)接受消息的通知。
uint32_t notify_suspend(int token)
//通知的恢復(fù)，設(shè)置后此token將恢復(fù)接受消息的通知。
uint32_t notify_resume(int token)
//通知的取消，設(shè)置后此token將不再接受消息的通知。
uint32_t notify_cancel(int token);

//注冊(cè)一個(gè)通知消息檢測(cè)的token。
 uint32_t notify_register_check(const char *name, int *out_token);

//檢測(cè)這個(gè)token所對(duì)應(yīng)的通知消息是否被發(fā)送過(guò)。如果通知消息被發(fā)送過(guò)則check返回1，否則返回0。
 uint32_t notify_check(int token, int *check);

 uint32_t notify_set_state(int token, uint64_t state64)
 uint32_t notify_get_state(int token, uint64_t *state64)

#include <notify.h>
#include <notify_keys.h>

void foo()
{
  int token1, token2, token3;
  //注冊(cè)監(jiān)聽(tīng)網(wǎng)絡(luò)狀態(tài)改變的通知。
  notify_register_dispatch(kNotifySCNetworkChange, & token1, dispatch_get_main_queue(), ^(int token) {
    //...
  });
  
   
  //注冊(cè)監(jiān)聽(tīng)系統(tǒng)磁盤(pán)空間不足的通知
  notify_register_dispatch(kNotifyVFSLowDiskSpaceRootFS, &token2, dispatch_get_main_queue(), ^(int token) {
    //....
  });
 
  
  //注冊(cè)監(jiān)聽(tīng)系統(tǒng)時(shí)間被改變的通知。
  notify_register_dispatch(kNotifyClockSet, &token3, dispatch_get_main_queue(), ^(int token) {
    //...
  });
  
}

"com.apple.asl.remote"
"com.apple.system.timezone"
"com.apple.MCX._managementStatusChangedForDomains"
"com.apple.CFPreferences._domainsChangedExternally"
"com.apple.system.clock_set"
"com.apple.system.timezone"
"AppleNumberPreferencesChangedNotification"
"AppleTimePreferencesChangedNotification"
"AppleDatePreferencesChangedNotification"
"AppleLanguagePreferencesChangedNotification"
"AppleTextBehaviorPreferencesChangedNotification"
"com.apple.librarian.account-token-changed"
"com.apple.system.batterysavermode"
"com.apple.accessibility.cache.forcetouch.sensitivity.changed"
"com.apple.networkd.started"
"com.apple.neconfigurationchanged"
"com.apple.networkd.settings"
"com.apple.system.config.network_change"
"com.apple.CoreAnimation.CAWindowServer.DisplayChanged"
"com.apple.networkd.proxy_count"
"com.apple.iohideventsystem.available"
"com.apple.backboardd.rawOrientation"
"com.apple.springboard.hasBlankedScreen"
"UIBacklightLevelChangedNotification"
"com.apple.accessibility.wob.status"
"com.apple.backboardd.videosettingschanged"
"com.apple.mobile.keybagd.user_changed"
"com.apple.LaunchServices.database"
"com.apple.accessibility.cache.enhance.text.legibility"
"com.apple.frontboard.systemappservices.serverNotifyToken"
"com.apple.frontboard.workspace.serverNotifyToken"
"com.apple.accessibility.cache.captioning"
"com.apple.accessibility.cache.vot"
"com.apple.accessibility.cache.ax"
"com.apple.accessibility.cache.app.ax"
"com.apple.accessibility.status"
"com.apple.language.changed"
"com.apple.springboard.showingAlertItem"
"com.apple.mobile.keybagd.lock_status"
"NameLayerTree"
"ApplePreferredContentSizeCategoryChangedNotification"
"kKeepAppsUpToDateEnabledChangedNotification"
"com.apple.accessibility.cache.reduce.motion"
"UIKeyboardSpringBoardKeyboardShow"
"UIKeyboardSpringBoardKeyboardHide"
"com.apple.locationd.registration"
"kCTDaemonReadyNotification"
"com.apple.system.config.network_change"
"com.apple.system.timezone./var/db/timezone/zoneinfo/UTC"
"com.apple.system.info:/etc/hosts"
"com.apple.MSVLoggingConfigurationDidChange"
"com.apple.managedconfiguration.defaultsdidchange"
"com.apple.AppSupport.loggingDefaultsChanged"
"com.apple.mobileipod.MPMusicPlayerController.launched"
"com.apple.networkd.nat64.ifstate"
"com.apple.ManagedConfiguration.profileListChanged"
"com.apple.backboardd.unambiguousOrientation"
"com.apple.accessibility.cache.button.shapes.enabled"
"com.apple.accessibility.cache.use.single.system.color.enabled"
"com.apple.accessibility.cache.darken.system.colors.enabled"
"com.apple.coreui.statistics"
"com.apple.UIKit.UIScreenEdgeGestureMode"
"com.apple.managedconfiguration.restrictionchanged"
"com.apple.managedconfiguration.passcodechanged"
"PINPolicyChangedNotification"
"com.apple.managedconfiguration.settingschanged"
"com.apple.managedconfiguration.effectivesettingschanged"
"com.apple.managedconfiguration.appwhitelistdidchange"
"com.apple.managedconfiguration.defaultsdidchange"
"com.apple.managedconfiguration.keyboardsettingschanged"
"com.apple.managedconfiguration.clientrestrictionschanged"
"com.apple.managedconfiguration.webFilterUIActiveDidChange"
"com.apple.ManagedConfiguration.managedAppsChanged"
"MCManagedBooksChanged"
"com.apple.managedconfiguration.allowpasscodemodificationchanged"
"com.apple.mediaserverd.up"
"com.apple.hangtracer.prefchangednotification"
"com.apple.accessibility.cache.enhance.background.contrast"
"com.apple.system.thermalpressurelevel"
"com.apple.backboardd.backlight.changed"
"com.apple.accessibility.QuickSpeakEnabled"
"com.apple.accessibility.cache.quick.speak"
"com.apple.powerlog.state_changed"
"com.apple.powerlog.clientPermissionState"