iOS Screen recording detection

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I tried to detect if screen capture is on for the application for iOS 11, to detect this the UIScreen.mainScreen.isCaptured property is used to check if it is recorded.

It works fine for the first launch, when the app is terminated and launched again, then the API returns NO though the screen capture is on.

Code:

//In viewWillAppear block



__block ViewController *weakSelf = self;

  [NSTimer scheduledTimerWithTimeInterval:2.0 repeats:YES block:^(NSTimer * _Nonnull timer) {

    [weakSelf screenCaptureDetection];

  }];



- (void) screenCaptureDetection {

  if (@available(iOS 11.0, *)) {

    for (UIScreen *screen in [UIScreen screens]) {

      if([screen performSelector:@selector(isCaptured)]){

      //Detected YES

    }

  }

}

Use case scenario:

Launch the app

Start screen recorder using the apple screen recording option

The screen recorder is detected

Terminate the app

Repeat the step 1 and 2

The screen recording is not detected, the API UIScreen.mainScreen.isCaptured returns NO

Please suggest

edited Nov 22 at 9:27

asked Nov 22 at 7:09

Raghav

306727

If that's reproducible, have you considered filing a bugreport?
– Gereon
Nov 22 at 7:20

Yes it is reproducible
– Raghav
Nov 22 at 8:50

FYI, unless you're still using MRR you should use __weak instead of __block. When using ARC, __block variables are still retained by the block. Also, __weak gives you a zeroing weak reference, which probably is what you're looking for.
– Lukas
Nov 22 at 13:31

@Lukas I will make the change
– Raghav
Nov 23 at 4:49

add a comment |

up vote
0
down vote

favorite

I tried to detect if screen capture is on for the application for iOS 11, to detect this the UIScreen.mainScreen.isCaptured property is used to check if it is recorded.

It works fine for the first launch, when the app is terminated and launched again, then the API returns NO though the screen capture is on.

Code:

//In viewWillAppear block



__block ViewController *weakSelf = self;

  [NSTimer scheduledTimerWithTimeInterval:2.0 repeats:YES block:^(NSTimer * _Nonnull timer) {

    [weakSelf screenCaptureDetection];

  }];



- (void) screenCaptureDetection {

  if (@available(iOS 11.0, *)) {

    for (UIScreen *screen in [UIScreen screens]) {

      if([screen performSelector:@selector(isCaptured)]){

      //Detected YES

    }

  }

}

Use case scenario:

Launch the app

Start screen recorder using the apple screen recording option

The screen recorder is detected

Terminate the app

Repeat the step 1 and 2

The screen recording is not detected, the API UIScreen.mainScreen.isCaptured returns NO

Please suggest

edited Nov 22 at 9:27

asked Nov 22 at 7:09

Raghav

306727

If that's reproducible, have you considered filing a bugreport?
– Gereon
Nov 22 at 7:20

Yes it is reproducible
– Raghav
Nov 22 at 8:50

FYI, unless you're still using MRR you should use __weak instead of __block. When using ARC, __block variables are still retained by the block. Also, __weak gives you a zeroing weak reference, which probably is what you're looking for.
– Lukas
Nov 22 at 13:31

@Lukas I will make the change
– Raghav
Nov 23 at 4:49

add a comment |

up vote
0
down vote

favorite

I tried to detect if screen capture is on for the application for iOS 11, to detect this the UIScreen.mainScreen.isCaptured property is used to check if it is recorded.

It works fine for the first launch, when the app is terminated and launched again, then the API returns NO though the screen capture is on.

Code:

//In viewWillAppear block



__block ViewController *weakSelf = self;

  [NSTimer scheduledTimerWithTimeInterval:2.0 repeats:YES block:^(NSTimer * _Nonnull timer) {

    [weakSelf screenCaptureDetection];

  }];



- (void) screenCaptureDetection {

  if (@available(iOS 11.0, *)) {

    for (UIScreen *screen in [UIScreen screens]) {

      if([screen performSelector:@selector(isCaptured)]){

      //Detected YES

    }

  }

}

Use case scenario:

Launch the app

Start screen recorder using the apple screen recording option

The screen recorder is detected

Terminate the app

Repeat the step 1 and 2

The screen recording is not detected, the API UIScreen.mainScreen.isCaptured returns NO

Please suggest

edited Nov 22 at 9:27

asked Nov 22 at 7:09

Raghav

306727

I tried to detect if screen capture is on for the application for iOS 11, to detect this the UIScreen.mainScreen.isCaptured property is used to check if it is recorded.

It works fine for the first launch, when the app is terminated and launched again, then the API returns NO though the screen capture is on.

Code:

//In viewWillAppear block



__block ViewController *weakSelf = self;

  [NSTimer scheduledTimerWithTimeInterval:2.0 repeats:YES block:^(NSTimer * _Nonnull timer) {

    [weakSelf screenCaptureDetection];

  }];



- (void) screenCaptureDetection {

  if (@available(iOS 11.0, *)) {

    for (UIScreen *screen in [UIScreen screens]) {

      if([screen performSelector:@selector(isCaptured)]){

      //Detected YES

    }

  }

}

Use case scenario:

Launch the app

Start screen recorder using the apple screen recording option

The screen recorder is detected

Terminate the app

Repeat the step 1 and 2

The screen recording is not detected, the API UIScreen.mainScreen.isCaptured returns NO

Please suggest

ios objective-c uiscreen

edited Nov 22 at 9:27

asked Nov 22 at 7:09

Raghav

306727

edited Nov 22 at 9:27

asked Nov 22 at 7:09

Raghav

306727

edited Nov 22 at 9:27

asked Nov 22 at 7:09

Raghav

306727

asked Nov 22 at 7:09

Raghav

306727

asked Nov 22 at 7:09

Raghav

306727

If that's reproducible, have you considered filing a bugreport?
– Gereon
Nov 22 at 7:20

Yes it is reproducible
– Raghav
Nov 22 at 8:50

FYI, unless you're still using MRR you should use __weak instead of __block. When using ARC, __block variables are still retained by the block. Also, __weak gives you a zeroing weak reference, which probably is what you're looking for.
– Lukas
Nov 22 at 13:31

@Lukas I will make the change
– Raghav
Nov 23 at 4:49

add a comment |

If that's reproducible, have you considered filing a bugreport?
– Gereon
Nov 22 at 7:20

Yes it is reproducible
– Raghav
Nov 22 at 8:50

FYI, unless you're still using MRR you should use __weak instead of __block. When using ARC, __block variables are still retained by the block. Also, __weak gives you a zeroing weak reference, which probably is what you're looking for.
– Lukas
Nov 22 at 13:31

@Lukas I will make the change
– Raghav
Nov 23 at 4:49

If that's reproducible, have you considered filing a bugreport?
– Gereon
Nov 22 at 7:20

Yes it is reproducible
– Raghav
Nov 22 at 8:50

FYI, unless you're still using MRR you should use __weak instead of __block. When using ARC, __block variables are still retained by the block. Also, __weak gives you a zeroing weak reference, which probably is what you're looking for.
– Lukas
Nov 22 at 13:31

@Lukas I will make the change
– Raghav
Nov 23 at 4:49

add a comment |

1 Answer
1

active

oldest

votes

up vote
0
down vote

You should check for recording repeatedly.

I used this code and it worked for me.
check it out:

https://gist.github.com/abhimuralidharan/8db55dff9023028867b719f251372bd7#file-screenrecordingdetector-m

answered Nov 22 at 8:59

Sepehr Behroozi

1,2231127

Yes, I am using the NSTimer to repeat the check for every 2 seconds
– Raghav
Nov 22 at 9:07

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
0
down vote

You should check for recording repeatedly.

I used this code and it worked for me.
check it out:

https://gist.github.com/abhimuralidharan/8db55dff9023028867b719f251372bd7#file-screenrecordingdetector-m

answered Nov 22 at 8:59

Sepehr Behroozi

1,2231127

Yes, I am using the NSTimer to repeat the check for every 2 seconds
– Raghav
Nov 22 at 9:07

add a comment |

up vote
0
down vote

You should check for recording repeatedly.

I used this code and it worked for me.
check it out:

https://gist.github.com/abhimuralidharan/8db55dff9023028867b719f251372bd7#file-screenrecordingdetector-m

answered Nov 22 at 8:59

Sepehr Behroozi

1,2231127

Yes, I am using the NSTimer to repeat the check for every 2 seconds
– Raghav
Nov 22 at 9:07

add a comment |

up vote
0
down vote

You should check for recording repeatedly.

I used this code and it worked for me.
check it out:

https://gist.github.com/abhimuralidharan/8db55dff9023028867b719f251372bd7#file-screenrecordingdetector-m

answered Nov 22 at 8:59

Sepehr Behroozi

1,2231127

You should check for recording repeatedly.

I used this code and it worked for me.
check it out:

https://gist.github.com/abhimuralidharan/8db55dff9023028867b719f251372bd7#file-screenrecordingdetector-m

answered Nov 22 at 8:59

Sepehr Behroozi

1,2231127

answered Nov 22 at 8:59

Sepehr Behroozi

1,2231127

answered Nov 22 at 8:59

Sepehr Behroozi

1,2231127

answered Nov 22 at 8:59

Sepehr Behroozi

1,2231127

Yes, I am using the NSTimer to repeat the check for every 2 seconds
– Raghav
Nov 22 at 9:07

add a comment |

Yes, I am using the NSTimer to repeat the check for every 2 seconds
– Raghav
Nov 22 at 9:07

Yes, I am using the NSTimer to repeat the check for every 2 seconds
– Raghav
Nov 22 at 9:07

add a comment |

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