在mac os中通过api锁定屏幕X

Question

是否有Api，可以将屏幕锁定为可从钥匙串首选项添加的菜单项？

Answer 1

我没有看到任何记录本身，而是菜单使用屏幕保护程序框架，它定义了这一点：

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

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

@end 

Answer 2

要锁定屏幕，请致电：

/系统/库/ CoreServices /菜单\ 其他/ User.menu /内容/资源/ CGSession -suspend

Answer 3

普雷斯顿是正确的，我用下面的方法，它就像一个魅力：

- (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么钥匙串并（即只锁定屏幕，不用去登录窗口），这是相当容易：

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

但是，这只适用于用户在睡眠或屏幕保护程序开始时要求密码设置为'立即'的情况。但是，您可以立即为它们设置它，然后将其设置回完成时的状态。事实证明，要生效可能会非常棘手（更多信息，请参阅this answer），但可以完成。把它放在一起，你有这样的：

- (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

要锁定计算机，并显示最近的用户密码PROMT您可以使用此代码：

- (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

这不是正式文件，并使用私有API，但在Mac OS 10.10（也许还更早的系统）以下工作：

// lockscreen.c 
extern void SACLockScreenImmediate (); 

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

建设有：

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

现在调用./lockscreen将立即锁定屏幕，无论用户在其安全首选项中配置了什么（是否锁定屏幕保护程序/系统休眠）并且无需登录用户。这是系统内部用于记录屏幕的功能。我很强烈地不鼓励使用它，它可能会破坏你的应用程序，我甚至不确定我是否正确地调用它（也许它需要参数，也许它有一个返回值），所以它甚至可能会破坏你的整个系统（暂时 - 重启将修复一切），谁知道。我只是想在某个地方发布文档。也许有更好的黑客技能的人可以再分析一下这个电话。

Answer 7

只是没有使用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() 

在这里： https://github.com/ftiff/MenuLock/blob/master/MenuLock/AppDelegate.swift#L126

Answer 8

下面的代码不准确的钥匙扣菜单项做什么，因为它只是调用。我曾经使用过这个（在10.11和10.12），但是现在在10.13（公共测试版）上失败了，因为根本没有Keychain.menu也没有菜单项。Mecki的答案是一个可用的替代品，但不会淡出屏幕，因此它的确是低级别的。

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]; 
}