Capture screen by excluding a button

sacha1996 · 01-28-2012, 06:47 AM

Hi,

You can use this code to capture a screen:

Code:

  UIGraphicsBeginImageContext(self.view.bounds.size);
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
    UIGraphicsEndImageContext();

But let's say I have a

Code:

 UIButton *button1;

How can I make a screen capture without the button1 in it?

Is there a way to cut this from the capture?

Thanks!

Duncan C · 01-28-2012, 07:12 AM

Quote:

Originally Posted by sacha1996

Hi,

You can use this code to capture a screen:

Code:

    UIGraphicsBeginImageContext(self.view.bounds.size);
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
    UIGraphicsEndImageContext();

But let's say I have a

Code:

 UIButton *button1;

How can I make a screen capture without the button1 in it?

Is there a way to cut this from the capture?

Thanks!

Hide the button, take the screen capture, and un-hide the button?

You would need to pause for an instant after hiding the button in order to let the screen re-draw. Something like this

Code:

button1.hidden = TRUE;
[self performSelector: screenSnapshot withObject: nil afterDelay: 0];

(A delay of 0 still lets the system return and go through the event loop, where your graphics changes take effect.)

Code:

- (void) screenSnapshot;
{
    UIGraphicsBeginImageContext(self.view.bounds.size);
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
    UIGraphicsEndImageContext();
    button1.hidden = false;
}

sacha1996 · 01-28-2012, 01:48 PM

Thank you!