CGAffineTransformMakeRotation before CABasicAnimation

Question

I rotate the UIImageView in place first before the rotation animation:

// rotate to the left by 90 degrees
someView.transform = CGAffineTransformMakeRotation((-0.5)*M_PI);

Then the call rotates 180 degrees ... but it looks like it rotates the image, starting from its original position, as if it were not originally rotated.

- (void)rotateIndicatorToAngle: (UIView *)view angle: (NSNumber *)angleInDegrees
{
    CALayer *layer = view.layer;
    CGFloat duration = 5.0;
    CGFloat radians = [self ConvertDegreesToRadians: [angleInDegrees floatValue]];
    CABasicAnimation* rotationAnimation;
    rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
    rotationAnimation.toValue = [NSNumber numberWithFloat: radians];
    rotationAnimation.duration = duration;
    rotationAnimation.cumulative = YES;
    rotationAnimation.repeatCount = 1.0;
    rotationAnimation.removedOnCompletion = NO;
    rotationAnimation.fillMode = kCAFillModeForwards;
    rotationAnimation.timingFunction = [CAMediaTimingFunction
functionWithName:kCAMediaTimingFunctionEaseOut];

[layer addAnimation: rotationAnimation forKey: @"rotationAnimation"];
}

What gives?

Answer 1

rotationAnimation.cumulative = YES;

Have you tried to use rotationAnimation.additive = YES;instead of cumulative?

Answer 2

You can use class methods from UIViewto easily animate your view:

[UIView beginAnimation: @"Rotate" context: nil];
[UIView setAnimationDuration: 5.0f];
[UIView setAnimationCurve: UIViewAnimationCurveEaseOut];

CGFloat radians = [self ConvertDegreesToRadians: [angleInDegrees floatValue]];
view.transform = CGAffineTransformMakeRotation(radians);

[UIView commitAnimation];

What I use most of the time, no need to use layers.

UPDATE: , , .