UIImage memory issues due to caching

Question

I googled for a memory issue related to UIImage, and came across many topics that talk about the problem but have no real help or solution.

I know when we use the -imageNamed:object is cached, so it’s better to use initWithData:. When we use drawRect:and UIGraphicsGetImageFromCurrentImageContext(), does the image go cache?

Also in the following code:

CGImageRef tmp = CGImageCreateWithImageInRect(imageToCrop.CGImage, clippedRect);    //pull the image from our cropped context    UIImage *cropped = [UIImage imageWithCGImage:tmp];//UIGraphicsGetImageFromCurrentImageContext();  
CGImageRelease(tmp);

Does caching happen even though there is no link in the documentation? How do we free the memory consumed by the cache?

Answer 1

, , , , CGImage UIImage . CGImage.

, UIImage, . , , , , , -initWithData: