用法：(这里用一个button控件来实现)
UIButton *transformButton;
//从小变大：

	[UIView beginAnimations:nil context:nil];
	[UIView setAnimationDuration:0.2];
	[UIView setAnimationDelegate:self];
	transformButton.transform = CGAffineTransformScale([self transformForOrientation], 1.1, 1.1);
	[UIView commitAnimations];

同理
//大变小
transformButton.transform = CGAffineTransformScale([self transformForOrientation], 0.001, 0.001);