CATransform3DRotate effects gone after applying anchor point - ios

Question

EDIT with correct observation.
I used the following two snippets to rotate an UIImageView. After the stage1, I got the desired 3D effect: the view rotate (3D effect) and stretched out (larger size). On stage2, I am trying to swing the rightView with the hinge on the right.
If I applied the line that changes the anchor point, the view swings correctly (hinge on right) with one major issue: The view's size got restored back to original size (smaller) while the (rotation) 3D effect is still intact and then the swinging occurs.
Any suggestions?
rightView.layer.anchorPoint = CGPointMake(1.0, 0.5);
-(void)stage1
{
[UIView animateWithDuration:1.5 animations:^{
rightView.transform = CGAffineTransformMakeTranslation(0,0); //rightView i UIImageView
CATransform3D _3Dt = CATransform3DIdentity;
_3Dt =CATransform3DMakeRotation(3.141f/42.0f,0.0f,-1.0f,0.0f);
_3Dt.m34 = -0.001f;
_3Dt.m14 = -0.0015f;
rightView.layer.transform = _3Dt;
} completion:^(BOOL finished){
if (finished) {
NSLog(#"finished..");
}
}];
}
-(void)Stage2
{
rightView.layer.anchorPoint = CGPointMake(1.0, 0.5); //issue?
rightView.center = CGPointMake(1012, 384);
[UIView animateWithDuration:1.75 animations:^{
CATransform3D rightTransform = rightView.layer.transform;
rightTransform.m34 = 1.0f/500;
rightTransform = CATransform3DRotate(rightTransform, M_PI_2, 0, 1, 0);
rightView.layer.transform = rightTransform;
} completion:^(BOOL finished) {
}];
}

Answer 1

You need to add the "options" to your animate with duration and add options:UIViewAnimationOptionBeginFromCurrentState
Otherwise it starts from the beginning again.
So your stage 2 would look like this:
-(void)Stage2
{
rightView.layer.anchorPoint = CGPointMake(1.0, 0.5); //issue?
rightView.center = CGPointMake(1012, 384);
[UIView animateWithDuration:1.75
delay:0.00
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
CATransform3D rightTransform = rightView.layer.transform;
rightTransform.m34 = 1.0f/500;
rightTransform = CATransform3DRotate(rightTransform, M_PI_2, 0, 1, 0);
rightView.layer.transform = rightTransform;
} completion:^(BOOL finished) {
}];
}