图片旋转（transform）出现锯齿如何解决(转)

 原文地址：

http://www.cocoachina.com/bbs/read.php?tid=84629 

 

      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;