iOS自动旋转问题

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation

{   return (toInterfaceOrientation == UIInterfaceOrientationPortrait);    

}

- (BOOL)shouldAutorotate

{    

  return NO;

 }

- (UIInterfaceOrientationMask)supportedInterfaceOrientations

{    

 return UIInterfaceOrientationMaskPortrait;//只支持这一个方向(正常的方向)    

}