UIButton rotation animation not rotating back with CGAffineTransformMakeRotation - objective-c

Question

I have a button (openMenu) that I am animating down (works fine) and rotate (works the first time) with a "drawer". The first time it rotates it works.. but when I try to rotate again it wigs out and hides the image and shows the button title? Any ideas of why? I need it to just rotate back another 45 degrees. Don't know why it would do this.
Also - see GIF image below so you see what is happening.
- (void)viewDidLoad
{
[super viewDidLoad];
draw1 = 0;
scrollView.frame = CGRectMake(0, -200, 768, 200);
[scrollView setContentSize:CGSizeMake(768, 200)];
openMenu.frame = CGRectMake(680, 100, 55, 55);
}
- (IBAction)openMenu:(id)sender {
if (draw1 == 0) {
draw1 = 1;
CGRect optionsDrawer = scrollView.frame;
CGRect optionsButton = openMenu.frame;
optionsDrawer.origin.y += 200;
optionsButton.origin.y += 200;
[UIView animateWithDuration:0.5
animations:^{
scrollView.frame = optionsDrawer;
openMenu.frame = optionsButton;
openMenu.transform = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(45));
}];
} else {
draw1 = 0;
CGRect optionsDrawer = scrollView.frame;
CGRect optionsButton = openMenu.frame;
optionsDrawer.origin.y -= 200;
optionsButton.origin.y -= 200;
[UIView animateWithDuration:0.5
animations:^{
scrollView.frame = optionsDrawer;
openMenu.frame = optionsButton;
openMenu.transform = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(45));
}];
}
}

Answer 1

Do like this, i am using layers to animate, it is easy, once u rotate, dont need to rotate again, just brings back to original state. I did like this it works for me, just try this.
since i am using layers add "QuartzCore" library and import this
#import<QuartzCore/QuartzCore.h> //include this
if (draw1 == 0)
{
....//your code
[UIView animateWithDuration:0.1 animations:^{
detailButton.layer.transform = CATransform3DMakeRotation((180) * 45, 0, 0, 1);
}];
}
else
{
....//your code
[UIView animateWithDuration:0.1 animations:^{
detailButton.transform = CGAffineTransformIdentity; //brings back to original position by animating
}];
}
hope this helps u :)

Answer 2

If you want to rotate the button back - you need to provide negative number as the value for CGAffineTransformMakeRotation().
Here is the snippet from Apple Docs:
CGAffineTransformMakeRotation()
Returns an affine transformation matrix constructed from a rotation
value you provide.
CGAffineTransform CGAffineTransformMakeRotation ( CGFloat angle );
The angle, in radians, by which this matrix rotates
the coordinate system axes. In iOS, a positive value specifies
counterclockwise rotation and a negative value specifies clockwise
rotation. In OS X, a positive value specifies clockwise rotation and a
negative value specifies counterclockwise rotation.
Hope this helps!