Directly access UIImage 's CGImage property may result undesired result.
Because UIImage may come from CIImage, if that's the case, then self.CGImage is nil.
We can add a check, if self.CGImage is nil, then create a CGImage from it's backing CIImage.
yackle
commented
7 years ago
Directly access UIImage 's CGImage property may result undesired result. Because UIImage may come from CIImage, if that's the case, then self.CGImage is nil. We can add a check, if self.CGImage is nil, then create a CGImage from it's backing CIImage.