Can I rotate UIImage around the centre with animation? - ios

Question

I want to rotate image in circular animation. How can I do it in a simple way?
I know it is not difficult but I'm new to iOS.
Can anybody tell me right code ?

Answer 1

its my solution:
- (void)startAnimation
{
[UIView animateWithDuration:.4 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
[self.loadingRingImageView setTransform:CGAffineTransformRotate(self.loadingRingImageView.transform, M_SQRT2)];
} completion:^(BOOL finished) {
if (finished)
{
[self startAnimation];
}
}];
}

Answer 2

[[self.<imageviewinstance> layer] addAnimation:[self rotationAnimation] forKey:nil];
Add the animation as above and the below is the animation code.
- (CABasicAnimation *)rotationAnimation
{
CABasicAnimation *rotAnim = [CABasicAnimation animationWithKeyPath:#"position"];
[rotAnim setFromValue:[NSValue valueWithCGPoint:CGPointMake(100.0, 400.0)]];
rotAnim.toValue = [NSValue valueWithCGPoint:CGPointMake(300.0, 150.0)];
// rotAnim.duration = 5.0;
rotAnim.autoreverses = YES;
// rotAnim.repeatCount = HUGE_VAL;
rotAnim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
return rotAnim;
}
if the above is not worked use this
- (CABasicAnimation *)rotationAnimation
{
CABasicAnimation *move = [CABasicAnimation animationWithKeyPath:#"transform.rotation" ];
move.delegate = self;
[move setFromValue:[NSNumber numberWithFloat:0]];
[move setToValue:[NSNumber numberWithFloat:50]];
[move setDuration:10.0f];
move.autoreverses = YES;
}

Answer 3

the answer of question i was wondering is ->
UIImageView *imageViewForAnimation = [[UIImageView alloc] initWithImage:imageToAnimate];
imageViewForAnimation.alpha = 1.0f;
CGRect imageFrame = imageViewForAnimation.frame;
//Your image frame.origin from where the animation need to get start
CGPoint viewOrigin = imageViewForAnimation.frame.origin;
viewOrigin.y = viewOrigin.y + imageFrame.size.height / 2.0f;
viewOrigin.x = viewOrigin.x + imageFrame.size.width / 2.0f;
imageViewForAnimation.frame = imageFrame;
imageViewForAnimation.layer.position = viewOrigin;
[self.view addSubview:imageViewForAnimation];
// Set up fade out effect
CABasicAnimation *fadeOutAnimation = [CABasicAnimation animationWithKeyPath:#"opacity"];
[fadeOutAnimation setToValue:[NSNumber numberWithFloat:0.3]];
fadeOutAnimation.fillMode = kCAFillModeForwards;
fadeOutAnimation.removedOnCompletion = NO;
// Set up scaling
CABasicAnimation *resizeAnimation = [CABasicAnimation animationWithKeyPath:#"bounds.size"];
[resizeAnimation setToValue:[NSValue valueWithCGSize:CGSizeMake(40.0f, imageFrame.size.height * (40.0f / imageFrame.size.width))]];
resizeAnimation.fillMode = kCAFillModeForwards;
resizeAnimation.removedOnCompletion = NO;
// Set up path movement
CAKeyframeAnimation *pathAnimation = [CAKeyframeAnimation animationWithKeyPath:#"position"];
pathAnimation.calculationMode = kCAAnimationPaced;
pathAnimation.fillMode = kCAFillModeForwards;
pathAnimation.removedOnCompletion = NO;
//Setting Endpoint of the animation
CGPoint endPoint = CGPointMake(480.0f - 30.0f, 40.0f);
//to end animation in last tab use
//CGPoint endPoint = CGPointMake( 320-40.0f, 480.0f);
CGMutablePathRef curvedPath = CGPathCreateMutable();
CGPathMoveToPoint(curvedPath, NULL, viewOrigin.x, viewOrigin.y);
CGPathAddCurveToPoint(curvedPath, NULL, endPoint.x, viewOrigin.y, endPoint.x, viewOrigin.y, endPoint.x, endPoint.y);
pathAnimation.path = curvedPath;
CGPathRelease(curvedPath);
CAAnimationGroup *group = [CAAnimationGroup animation];
group.fillMode = kCAFillModeForwards;
group.removedOnCompletion = NO;
[group setAnimations:[NSArray arrayWithObjects:fadeOutAnimation, pathAnimation, resizeAnimation, nil]];
group.duration = 0.7f;
group.delegate = self;
[group setValue:imageViewForAnimation forKey:#"imageViewBeingAnimated"];
[imageViewForAnimation.layer addAnimation:group forKey:#"savingAnimation"];