Question

I had asked this question once before but has had 0 attention and the person helping me has not responded in weeks, so please forgive me but I still do need help.

Im working with CGAffineTransformMakeRotation to flip a UILabel 180 degrees, I want the rotation based on UIOrientationPortrait and UIOrientationPortraitUpsideDown. I get 1/2 the result: when users flip to upside down (from portrait) the label transforms 180 and turns upside down as well (still facing the home button [Important])

BUT

when I rotate it back to Portrait the label stays in the flipped rotation state and does not stay with the home button. Thats what I need help with….

Here is the code i have:

#define degreesToRadian(x) (M_PI * (x) / 180.0)

...

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    TranslateLabel.transform = CGAffineTransformMakeRotation(degreesToRadian(180));
}

Answer 1

You are rotating it upside down no matter what the orientation is. If you want it to rotate differently depending on the orientation, you have to do something like this:

-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
  switch(toInterfaceOrientation){
    case UIInterfaceOrientationPortrait:
      TranslateLabel.transform = CGAffineTransformIdentity;
      break;
    case UIInterfaceOrientationPortraitUpsideDown:
      TranslateLabel.transform = CGAffineTransformMakeRotation(degreesToRadian(180));
      break;
  }
}

That way, it will rotate the label upside down when the device is upside down and it will return it back to normal when the device is on portrait orientation.