mac屏幕保护程序启动事件

屏幕保护程序启动时是否有事件被触发？ 喜欢钥匙串锁定：

OSStatus keychain_locked(SecKeychainEvent keychainEvent, SecKeychainCallbackInfo *info, void *context){...} 

Answer 1

终于找到了 – 解决方案是使用NSDistributedNotificationCenter并观察下面的事件

• com.apple.screensaver.didstart
• com.apple.screensaver.willstop
• com.apple.screensaver.didstop
• com.apple.screenIsLocked
• com.apple.screenIsUnlocked

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 [[NSDistributedNotificationCenter defaultCenter] addObserver:self selector:@selector(screensaverStarted:) name:@"com.apple.screensaver.didstart" object:nil]; 

Answer 2

虽然没有Carbon事件，但您可以在当前应用程序更改时收到通知，然后检查新应用程序是否是屏幕保护程序进程。

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 // Register the event handler for when applications change { EventTypeSpec es; es.eventClass = kEventClassApplication; es.eventKind = kEventAppFrontSwitched; InstallApplicationEventHandler(&appChanged, 1, &es, NULL, NULL); } OSStatus appChanged(EventHandlerCallRef nextHandler, EventRef anEvent, void* userData) { ProcessSerialNumber psn; GetEventParameter(anEvent, kEventParamProcessID, typeProcessSerialNumber, NULL, sizeof(psn), NULL, &psn); // Determine process name char procName[255]; { ProcessInfoRec pInfo; Str255 procName255; FSRef ref; pInfo.processInfoLength = sizeof(ProcessInfoRec); pInfo.processName = procName255; pInfo.processAppRef = &ref; GetProcessInformation(&psn, &pInfo); const unsigned int size = (unsigned int)procName255[0]; memcpy(procName, procName255 + 1, size); procName[size] = '\0'; } if(strcmp(procName, "ScreenSaverEngine") == 0) { NSLog(@"Found %s\n", procName); } return noErr; } 

Answer 3

这不是问题的答案，但是我花了很多时间寻找OS X发布的通知列表，所以我想发布一些我为通知发现编写的代码。

代码只是注册以收听所有通知，并为每个通知打印一些信息。

 import Foundation let distCenter = CFNotificationCenterGetDistributedCenter() if distCenter == nil { exit(1) } CFNotificationCenterAddObserver(distCenter, nil, { (center, observer, name, object, userInfo) -> Void in print("Event occurred: \(name) User info: \(userInfo)") }, nil, nil, .DeliverImmediately) CFRunLoopRun()