Take screenshot programmatically iOs 5

Question

I'm developing an iOs 5 iPhone app, I would like to take a screenshot programmatically when the user press a button of a view in the story board. I've tried many codes but they are for older versions of iOs. How can I do it in iOs 5. Thanks!!

Answer 1

- (void)drawRect:(CGRect)rect {   
     UIGraphicsBeginImageContext(self.bounds.size);
     [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
     UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();  
     UIGraphicsEndImageContext();   
}

Answer 2

Well, there are few ways of capturing the iPhone screen programmatically

1. Using UIKIT http://developer.apple.com/library/ios/#qa/qa1703/_index.html

2. Using AVFoundation framework http://developer.apple.com/library/ios/#qa/qa1702/_index.html

3. Using OpenGL ES http://developer.apple.com/library/ios/#qa/qa1704/_index.html

4. Using view

   CGRect screenRect = [[UIScreen mainScreen] bounds];
   UIGraphicsBeginImageContext(screenRect.size);
   CGContextRef ctx = UIGraphicsGetCurrentContext();
   [[UIColor blackColor] set];
   CGContextFillRect(ctx, screenRect);
   [self.window.layer renderInContext:ctx];
   UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
   UIGraphicsEndImageContext();
   

5. Using Window

   UIGraphicsBeginImageContext(self.view.frame.size);
   [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
   UIImage *viImage=UIGraphicsGetImageFromCurrentImageContext();
   UIGraphicsEndImageContext();
   

Out of these 5 methods, I found the first option very convenient for copy-pasting and for applying level of compression as 1st method gives the image with true pixel data.