Converting UIView to UIImage gives poor quality

问题

I am using the following code to capture a UIView as a UIImage and save it in Docs Dir.

- (UIImage *) imageWithView:(UIView *)view
{
    UIGraphicsBeginImageContext(view.bounds.size);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];

    UIImage * img = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return img;
}

The UIImage is successfully saved. However the resolution is very poor. See the image below for reference. How do I make sure the resolution is retained as per the original image?

回答1:

Use UIGraphicsBeginImageContextWithOptions instead of UIGraphicsBeginImageContext

UIGraphicsBeginImageContextWithOptions(view.bounds.size, NO, 0.0);

Tell me its working or not :)

回答2:

Capture the image of Entire view using below code :-

 UIGraphicsBeginImageContext(view.frame.size); 

来源：https://stackoverflow.com/questions/18229251/converting-uiview-to-uiimage-gives-poor-quality