0
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);
调试消息输出:问题有关CGAffineTransformTranslate
0.000000,0.000000,320.000000,480.000000
-80.000000,80.000000,480.000000,320.000000
为什么用(X,Y)变化(-80,80)?
为什么在每个轴上通过零点来平移原点?那什么都不做。 (即使你认为'CGAffineTransformTranslate'将*翻译为*那一点,但它不会做任何事情:翻译移动原点,0,0 *是原点,因此翻译为0,0会将原点转移到原点,也不会做任何事情。) – 2010-04-12 14:32:04