我正在尝试从另一个进程获取sharingType
的NSWindow
值。
我创建了一个新项目,并将sharingType
的值设置为NSWindowSharingReadWrite
。
我创建了另一个项目,然后从该项目中运行以下代码来获取kCGWindowSharingState
的值:
CFArrayRef windowList = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID);
NSLog(@"windowList: %@", windowList);
它返回带有kCGWindowSharingState
值的字典数组,但始终设置为0
。
任何对此的帮助都将是很好的。预先感谢。
您的另一个项目必须具有屏幕录制权限。是否有API要求他们?否。您必须尝试记录屏幕以获取系统对话框。
- (BOOL)doWeHaveScreenRecordingPermissions {
// Try to record -> triggers system dialog
CGDisplayStreamRef stream = CGDisplayStreamCreate(CGMainDisplayID(), 1, 1, kCVPixelFormatType_32BGRA, nil, ^(CGDisplayStreamFrameStatus status, uint64_t displayTime, IOSurfaceRef frameSurface, CGDisplayStreamUpdateRef updateRef) {
});
// NULL = No permissions
BOOL result = stream != NULL;
if (stream) {
CFRelease(stream);
}
return result;
}
您可以在没有这些权限的情况下使用CGWindowListCopyWindowInfo
,但是kCGWindowSharingState
的值将始终为0
。一旦您的另一个应用获得这些权限,将返回正确的值。
在WWDC 2019 - Advances in macOS Security中简要讨论。
此安全舞蹈适用于kCGWindowSharingState
和kCGWindowName
。
我的应用程序代表:
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
NSLog(@"Screen Recording permissions: %@", [self doWeHaveScreenRecordingPermissions] ? @"Yay!" : @"N/A");
CFArrayRef windowList = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID);
if (windowList == NULL) {
return;
}
CFIndex count = CFArrayGetCount(windowList);
for (CFIndex index = 0 ; index < count ; index++) {
CFDictionaryRef windowInfo = CFArrayGetValueAtIndex(windowList, index);
CFStringRef owner = CFDictionaryGetValue(windowInfo, kCGWindowOwnerName);
if (owner == NULL) {
continue;
}
if (CFStringCompare(owner, CFSTR("ShareWindow"), 0) != kCFCompareEqualTo) {
continue;
}
NSLog(@"Got a window from ShareWindow! %@", windowInfo);
}
CFRelease(windowList);
}
无屏幕录制权限
2020-06-03 13:22:36.073581+0200 GetSharedWindow[54889:828225] Screen Recording permissions: N/A
2020-06-03 13:22:36.074951+0200 GetSharedWindow[54889:828225] Got a window from ShareWindow! {
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 292;
Width = 480;
X = 235;
Y = 538;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 1152;
kCGWindowNumber = 5672;
kCGWindowOwnerName = ShareWindow;
kCGWindowOwnerPID = 54445;
kCGWindowSharingState = 0; <-----
kCGWindowStoreType = 1;
}
屏幕录像权限
2020-06-03 13:24:33.823247+0200 GetSharedWindow[55697:832599] Screen Recording permissions: Yay!
2020-06-03 13:24:33.824580+0200 GetSharedWindow[55697:832599] Got a window from ShareWindow! {
kCGWindowAlpha = 1;
kCGWindowBounds = {
Height = 292;
Width = 480;
X = 235;
Y = 538;
};
kCGWindowIsOnscreen = 1;
kCGWindowLayer = 0;
kCGWindowMemoryUsage = 1152;
kCGWindowName = Window;
kCGWindowNumber = 5672;
kCGWindowOwnerName = ShareWindow;
kCGWindowOwnerPID = 54445;
kCGWindowSharingState = 2; <-----
kCGWindowStoreType = 1;
}