在mac os中通過api鎖定屏幕X

Question

是否有Api，可以將屏幕鎖定爲可從鑰匙串首選項添加的菜單項？

Answer 1

我沒有看到任何記錄本身，而是菜單使用屏幕保護程序框架，它定義了這一點：

@interface ScreenSaverDefaults : NSUserDefaults 
{ 
@private 
    NSMutableDictionary  *_defaults; 
    NSMutableDictionary  *_registeredDefaults; 
    NSString    *_userName; 
    NSString    *_domainName; 
    BOOL     _dirty; 
    BOOL     _screenLockPrefChanged; 
} 

+ (id) defaultsForModuleWithName:(NSString *)inModuleName; 

@end 

Answer 2

要鎖定屏幕，請致電：

/系統/庫/ CoreServices /菜單\ 其他/ User.menu /內容/資源/ CGSession -suspend

Answer 3

普雷斯頓是正確的，我用下面的方法，它就像一個魅力：

- (void)lockScreen { 
    NSTask *task; 
    NSArray *arguments = [NSArray arrayWithObject:@"-suspend"]; 

    task = [[NSTask alloc] init]; 
    [task setArguments: arguments]; 
    [task setLaunchPath: @"/System/Library/CoreServices/Menu Extras/User.menu/Contents/Resources/CGSession"]; 
    [task launch]; 
    [task release]; 
    NSLog(@"screen is Locked"); 
} 

Answer 4

如果你真的想要做什麼鑰匙串並（即只鎖定屏幕，不用去登錄窗口），這是相當容易：

io_registry_entry_t r = IORegistryEntryFromPath(kIOMasterPortDefault, "IOService:/IOResources/IODisplayWrangler"); 
if (r) { 
    IORegistryEntrySetCFProperty(r, CFSTR("IORequestIdle"), sleep ? kCFBooleanTrue);   
    IOObjectRelease(r); 
} 

但是，這隻適用於用戶在睡眠或屏幕保護程序開始時要求密碼設置爲'立即'的情況。但是，您可以立即爲它們設置它，然後將其設置回完成時的狀態。事實證明，要生效可能會非常棘手（更多信息，請參閱this answer），但可以完成。把它放在一起，你有這樣的：

- (void)lockScreen; 
{ 
    int screenSaverDelayUserSetting = 0; 

    screenSaverDelayUserSetting = [self readScreensaveDelay]; 

    if (screenSaverDelayUserSetting != 0) { 
     // if the delay isn't already 0, temporarily set it to 0 so the screen locks immediately. 
     [self setScreensaverDelay:0]; 
     [self touchSecurityPreferences]; 
    } 

    io_registry_entry_t r = IORegistryEntryFromPath(kIOMasterPortDefault, "IOService:/IOResources/IODisplayWrangler"); 
    if (r) { 
     IORegistryEntrySetCFProperty(r, CFSTR("IORequestIdle"), sleep ? kCFBooleanTrue : kCFBooleanFalse);   
     IOObjectRelease(r); 
    } 

    if (screenSaverDelayUserSetting != 0) { 
     [self setScreensaverDelay:screenSaverDelayUserSetting]; 
     [self launchAndQuitSecurityPreferences]; 
    } 
} 

- (void)touchSecurityPreferences; 
{ 
    // necessary for screen saver setting changes to take effect on file-vault-enabled systems 
    // NOTE: this *only* works when going from non-zero settings of askForPasswordDelay to zero. 

    NSAppleScript *kickSecurityPreferencesScript = [[[NSAppleScript alloc] initWithSource: @"tell application \"System Events\" to tell security preferences to set require password to wake to true"] autorelease]; 
    [kickSecurityPreferencesScript executeAndReturnError:nil]; 
} 

- (void)launchAndQuitSecurityPreferences; 
{ 
    // necessary for screen saver setting changes to take effect on file-vault-enabled systems when going from a askForPasswordDelay setting of zero to a non-zero setting 
    NSAppleScript *kickSecurityPreferencesScript = [[[NSAppleScript alloc] initWithSource: 
                @"tell application \"System Preferences\"\n" 
                @"  tell anchor \"General\" of pane \"com.apple.preference.security\" to reveal\n" 
                @"  activate\n" 
                @"end tell\n" 
                @"delay 0\n" 
                @"tell application \"System Preferences\" to quit"] autorelease]; 
    [kickSecurityPreferencesScript executeAndReturnError:nil]; 
} 

- (int)readScreensaveDelay; 
{ 
    NSArray *arguments = @[@"read",@"com.apple.screensaver",@"askForPasswordDelay"]; 

    NSTask *readDelayTask = [[[NSTask alloc] init] autorelease]; 
    [readDelayTask setArguments:arguments]; 
    [readDelayTask setLaunchPath: @"/usr/bin/defaults"]; 

    NSPipe *pipe = [NSPipe pipe]; 
    [readDelayTask setStandardOutput:pipe]; 
    NSFileHandle *file = [pipe fileHandleForReading]; 
    [readDelayTask launch]; 
    NSData *resultData = [file readDataToEndOfFile]; 
    NSString *resultString = [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding]; 
    return resultString.intValue; 
} 

- (void)setScreensaverDelay:(int)delay; 
{ 
    NSArray *arguments = @[@"write",@"com.apple.screensaver",@"askForPasswordDelay", [NSString stringWithFormat:@"%i", delay]]; 
    NSTask *resetDelayTask = [[[NSTask alloc] init] autorelease]; 
    [resetDelayTask setArguments:arguments]; 
    [resetDelayTask setLaunchPath: @"/usr/bin/defaults"]; 
    [resetDelayTask launch]; 
} 

Answer 5

要鎖定計算機，並顯示最近的用戶密碼PROMT您可以使用此代碼：

- (void)lockScreen 
{ 
    MDSendAppleEventToSystemProcess(kAESleep); 
} 

OSStatus MDSendAppleEventToSystemProcess(AEEventID eventToSendID) 
{ 
    AEAddressDesc     targetDesc; 
    static const ProcessSerialNumber kPSNOfSystemProcess = {0, kSystemProcess}; 
    AppleEvent      eventReply   = {typeNull, NULL}; 
    AppleEvent      eventToSend   = {typeNull, NULL}; 

    OSStatus status = AECreateDesc(typeProcessSerialNumber, 
      &kPSNOfSystemProcess, sizeof(kPSNOfSystemProcess), &targetDesc); 

    if (status != noErr) return status; 

    status = AECreateAppleEvent(kCoreEventClass, eventToSendID, 
      &targetDesc, kAutoGenerateReturnID, kAnyTransactionID, &eventToSend); 

    AEDisposeDesc(&targetDesc); 

    if (status != noErr) return status; 

    status = AESendMessage(&eventToSend, &eventReply, 
      kAENormalPriority, kAEDefaultTimeout); 

    AEDisposeDesc(&eventToSend); 
    if (status != noErr) return status; 
    AEDisposeDesc(&eventReply); 
    return status; 
} 

Answer 6

這不是正式文件，並使用私有API，但在Mac OS 10.10（也許還更早的系統）以下工作：

// lockscreen.c 
extern void SACLockScreenImmediate (); 

int main() 
{ 
    SACLockScreenImmediate(); 
    return 0; 
} 

建設有：

clang -F /System/Library/PrivateFrameworks -framework login -o lockscreen lockscreen.c 

現在調用./lockscreen將立即鎖定屏幕，無論用戶在其安全首選項中配置了什麼（是否鎖定屏幕保護程序/系統休眠）並且無需登錄用戶。這是系統內部用於記錄屏幕的功能。我很強烈地不鼓勵使用它，它可能會破壞你的應用程序，我甚至不確定我是否正確地調用它（也許它需要參數，也許它有一個返回值），所以它甚至可能會破壞你的整個系統（暫時 - 重啓將修復一切），誰知道。我只是想在某個地方發佈文檔。也許有更好的黑客技能的人可以再分析一下這個電話。

Answer 7

只是沒有使用SWIFT Mecki的回答是：

let libHandle = dlopen("/System/Library/PrivateFrameworks/login.framework/Versions/Current/login", RTLD_LAZY) 
    let sym = dlsym(libHandle, "SACLockScreenImmediate") 
    typealias myFunction = @convention(c) Void -> Void 
    let SACLockScreenImmediate = unsafeBitCast(sym, myFunction.self) 
    SACLockScreenImmediate() 

在這裏： https://github.com/ftiff/MenuLock/blob/master/MenuLock/AppDelegate.swift#L126

Answer 8

下面的代碼不準確的鑰匙扣菜單項做什麼，因爲它只是調用。我曾經使用過這個（在10.11和10.12），但是現在在10.13（公共測試版）上失敗了，因爲根本沒有Keychain.menu也沒有菜單項。Mecki的答案是一個可用的替代品，但不會淡出屏幕，因此它的確是低級別的。

void lock() { 
    NSBundle *bundle = [NSBundle bundleWithPath:@"/Applications/Utilities/Keychain Access.app/Contents/Resources/Keychain.menu"]; 
    Class principalClass = [bundle principalClass]; 
    id instance = [[principalClass alloc] init]; 
    [instance performSelector:@selector(_lockScreenMenuHit:) withObject:nil]; 
}