ScreenShot of an UILabel and what is in a UIImageView
I am trying to take a screenshot of my UIImageView and a UILabel that is on top of that.
What I have so far grabs the UIImage in the ImageView and then renders the overlay on it but the positioning of the UILabel is all wrong. I am setting the size of the capture to the actual image size(which isn't what i want).
I just want to be able to take a screenshot exactly how it appears on the screen.
CGSize imageSize = self.imageFromOtherView.size;
// define the size and grab a UIImage from it
UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
[self.imageFromOtherView drawInRect:CGRectMake(0, 0, imageSize.width, imageSize.height)];
[self.socialLabel.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *capturedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
Create a UIView to hold both the UIImageView and UILabel. Then pass this container view through this code. I have my view as a property called viewForPhoto so when the code is called it only captures that view. You can tweak it so that it receives a view. This will return the UIImage that you want.
- (UIImage *)imageByRenderingView
{
UIGraphicsBeginImageContextWithOptions(self.viewForPhotoView.bounds.size, NO, 0.0);
[self.viewForPhotoView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return resultingImage;
}
将这些视图添加到公共容器视图中，然后调用- (BOOL)drawViewHierarchyInRect:(CGRect)rect afterScreenUpdates:(BOOL)afterUpdates视图在上下文中呈现它。