图片旋转（transform）出现锯齿如何解决(转)

UIView *myView = [[UIView alloc] initWithFrame:CGRectZero];

CGRect rect = myView.frame;

rect.size = CGSizeMake(100.0, 100.0);

myView.frame = rect;

myView.center = mainScroller.center;

myView.layer.borderColor = [UIColor whiteColor].CGColor;

myView.alpha = 0.5;

myView.layer.borderWidth = 3.0;

myView.backgroundColor = [UIColor blueColor];

[mainScroller addSubview:myView];

[myView release];

CGFloat angle = M_PI / 30.0;

[myView.layer setTransform:CATransform3DRotate(myView.layer.transform, angle, 0.0, 0.0, 1.0)];

myView.layer.shadowOffset = CGSizeMake(0, 2);

//0,2

myView.layer.shadowRadius = 3.0;

myView.layer.shadowColor = [UIColor whiteColor].CGColor;

myView.layer.shadowOpacity = 1.0;

myView.layer.shouldRasterize =

YES

;

myView.layer.edgeAntialiasingMask = kCALayerLeftEdge | kCALayerRightEdge | kCALayerBottomEdge | kCALayerTopEdge;

myView.layer.masksToBounds =

YES

;