How to capture UIView to UIImage without loss of quality on retina display

Question

My code works fine for normal devices but creates blurry images on retina devices.

Does anybody know a solution for my issue?

+ (UIImage *) imageWith         


        

Answer 1

The currently accepted answer is now out of date, at least if you are supporting iOS 7.

Here is what you should be using if you are only supporting iOS7+:

+ (UIImage *) imageWithView:(UIView *)view
{
    UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.opaque, 0.0f);
    [view drawViewHierarchyInRect:view.bounds afterScreenUpdates:NO];
    UIImage * snapshotImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return snapshotImage;
}

Swift 4:

func imageWithView(view: UIView) -> UIImage? {
    UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.isOpaque, 0.0)
    defer { UIGraphicsEndImageContext() }
    view.drawHierarchy(in: view.bounds, afterScreenUpdates: true)
    return UIGraphicsGetImageFromCurrentImageContext()
}

As per this article, you can see that the new iOS7 method drawViewHierarchyInRect:afterScreenUpdates: is many times faster than renderInContext:.