I'm trying since 5 hours now:
- (void)drawRect:(CGRect)rect {
// flip the wrong coordinate system
CGContextTranslateCTM(context, 0.0f, rect.size.height); //shift the origin up
CGContextScaleCTM(context, 1.0f, -1.0f); //flip the y-axis
CGContextDrawImage(context, myImgView.frame, myImageView.image.CGImage);
}
The problem: While the image draws correctly, the coordinates specified by the UIImageView frame are completely useless. The image appears placed completely wrong on screen.
I guess I must also flip the CGRect of the UIImageView? But how?
The UIImageView class is optimized to draw its images to the display. UIImageView will not call drawRect: a subclass. If your subclass needs custom drawing code, it is recommended you use UIView as the base class.
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