Taking screenshot on IOS

[Anonymous]

Hello!

I've been working on an IOS app that uses the Scaleform Mobile SDK as the rendering backend for a game made entirely in flash. I've been tasked with implimenting a button as part of the game interface that will take a screenshot and save it to the camera roll. I was able to get this working on any device running IOS 7.0 or higher using the following code:

//This works on ios 7 and above

    NSLog(@"Saving screenshot...");

    UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, [UIScreenmainScreen].scale);

    [self.view drawViewHierarchyInRect:self.view.bounds afterScreenUpdates:NO];

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

When I try and run this code on a device running IOS 6.0 or fewer the app will crash. Specifically it crashes on this line:

[self.view drawViewHierarchyInRect:self.view.bounds afterScreenUpdates:NO];

XCode is throwing a NSInvalidArgumentException saying unrecognized selector sent to instance. I've done a bit of research and I should be able to use the following code to take a screenshot on older versions of IOS; however it only saves out a blank white screenshot.

//This works on all things but it saves a white screenshot.

    CGSize imageSize = CGSizeMake(self.view.bounds.size.width, self.view.bounds.size.height);

    UIGraphicsBeginImageContextWithOptions(imageSize, YES, 1.0);

    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];

    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);

If anyone knows of a way to make this work I would greatly appreciate it.