Take a screenshot of an UIView where its subviews are camera sessions

Question

I'm building an app where I need to take a screenshot of a view whose subviews are camera sessions (AVFoundation sessions). I've tried this code: ``` CGRect rect = [self.containerView bounds]; UIGraphicsBeginImageContextWithOptions(rect.size,YES,0.0f); CGContextRef context = UIGraphicsGetCurrentContext(); [self.containerView.layer renderInContext:context]; UIImage *capturedImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); ``` Which effectively gets me an UIImage with the views, only that the camera sessions are black: I've tried the private method `UIGetScreenImage()` and works perfectly, but as Apple doesn't allows this, I can't use it. I've also tried the one in Apple's docs but it's the same. I've tracked the problem to AVFoundation sessions using layers. How can I achieve this? The app has a container view with two views which are stopped camera sessions.

Accepted Answer

If using iOS 7, it's fairly simple and you could do something like this from a UIViewController:

```
UIView *snapshotView = [self.view snapshotViewAfterScreenUpdates:YES];
```

You can also use this link from a widow: iOS: what's the fastest, most performant way to make a screenshot programatically?

For iOS 6 and earlier, I could only find the following Apple Technical Q&A: [How do I take a screenshot of my app that contains both UIKit and Camera elements?]

- Capture the contents of your camera view.

- Draw that captured camera content yourself into the graphics context that you are rendering your UIKit elements. (Similar to what you did in your code)

Take a screenshot of an UIView where its subviews are camera sessions

Solution

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