I've made a simple command line app that requires Screen recording permission.
When I ran it from Xcode, it prompts for a permission and once I allowed it from the settings, it runs well.
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <CoreGraphics/CGDisplayStream.h>
int main() {
printf("# Start #\n");
if (CGPreflightScreenCaptureAccess()) {
printf("# Permitted.\n");
} else {
printf("# Not permitted.\n");
if (CGRequestScreenCaptureAccess() == false) {
printf("# CGRequestScreenCaptureAccess() returning false\n");
}
}
size_t output_width = 1280;
size_t output_height = 720;
dispatch_queue_t dq = dispatch_queue_create("com.domain.screengrabber", DISPATCH_QUEUE_SERIAL);
CGError err;
CGDisplayStreamRef sref = CGDisplayStreamCreateWithDispatchQueue(
1,
output_width,
output_height,
'BGRA',
NULL,
dq,
^(
CGDisplayStreamFrameStatus status,
uint64_t time,
IOSurfaceRef frame,
CGDisplayStreamUpdateRef ref
) {
printf("Got frame: %llu, FrameStatus:%d \n", time, status);
}
);
err = CGDisplayStreamStart(sref);
if (kCGErrorSuccess != err) {
printf("Error: failed to start streaming the display. %d\n", err);
exit(EXIT_FAILURE);
}
while (true) {
usleep(1e5);
}
CGDisplayStreamStop(sref);
printf("\n\n");
return 0;
}
Now I want to execute this from terminal, so I went to the build folder and
typed the app name.
cd /Users/klee/Library/Developer/Xcode/DerivedData/ScreenStreamTest-ezddqbkzhndhakadslymnvpowtig/Build/Products/Debug
./ScreenStreamTest
But I am getting following output without any prompt for permission.
# Start #
# Not permitted.
# CGRequestScreenCaptureAccess() returning false
Error: failed to start streaming the display. 1001
Is there a something I need to consider for this type of command line app?
Kyung
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Post
Replies
Boosts
Views
Activity
I had no luck to compile a sample code provided by apple with Xcode 16.0 beta 5.
ScreenCaptureKit demo (https://developer.apple.com/documentation/screencapturekit/capturing_screen_content_in_macos)
The part it is failling is,
streamOutput.capturedFrameHandler = { continuation.yield($0) }
And the error message is
Sending '$0' risks causing data races
Task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
Please enlighten me why this is an issue and how to avoid?
Thanks in advance!
Hello,
I am trying to make use of SCContentSharingPicker for my app and I wonder how I can detect a close event of SCContentSharingPicker.
I could open the picker screen with following simple code:
SCContentSharingPicker.shared.isActive = true
SCContentSharingPicker.shared.add(self)
SCContentSharingPicker.shared.present()
And I closed it with "Cancel" button located at the top right corner.
Initially I was expecting to get a event through an observer like below but realised that it's called when a stream is canceled.
extension ContentPickerButton: SCContentSharingPickerObserver {
func contentSharingPicker(_ picker: SCContentSharingPicker, didCancelFor stream: SCStream?) {
logger.info("Picker canceled for stream \(stream)")
}
I would like to get a picker close event so that I can deactivate the picker. (Otherwise, camera icon will stay alive at the tray.)
How do we get a close event?
How do we open Keyboard Viewer programatically? I am working on Sonoma Mac Application.
I could open "Emoji & Symbols" programatically as follows.
NSArray *sources = (__bridge NSArray*)TISCreateInputSourceList(nil, false);
TISInputSourceRef keyboardViewer = (__bridge TISInputSourceRef)[sources objectAtIndex: 2]; // "Emoji & Symbols" is the 3rd one. So 2.
TISSelectInputSource(keyboardViewer);
CFRelease((CFTypeRef)sources);
After some searching, Keyboard Viewer could be opened with similiar approach with above in the old previous version of MacOS.
I have a strong feeling there is a way to bring up the keyboard because we can bring up "Emoji & Symbols". I mean, why would apple prevent us to show Keyboard Viewer.
Any idea?