question about CGAffineTransformTranslate
- by www.ruu.cc
CGRect rect1 = backgroundImageView.frame;
NSLog(@"%f,%f,%f,%f",rect1.origin.x,rect1.origin.y,rect1.size.width,rect1.size.height);
angle = -90.0;
moveX = 0;
moveY = 0.0;
CGFloat degreesToRadians = M_PI * angle / 180.0;
CGAffineTransform landscapeTransform = CGAffineTransformMakeRotation(degreesToRadians);
landscapeTransform = CGAffineTransformTranslate( landscapeTransform, moveX, moveY );
[backgroundImageView setTransform:landscapeTransform];
rect1 = backgroundImageView.frame;
NSLog(@"%f,%f,%f,%f",rect1.origin.x,rect1.origin.y,rect1.size.width,rect1.size.height);
the debug message output:
0.000000,0.000000,320.000000,480.000000
-80.000000,80.000000,480.000000,320.000000
why does the (x,y) changes to (-80,80)?
