UI组件缩放和旋转

旋转（注意：值是一个180°PI为单位）

#pragma mark 改变组件角度旋转 - (IBAction)rotationBlock:(UIButton *)sender {     [UIView beginAnimations:nil context:nil];     [UIView setAnimationDuration:.8];     //旋转开始     UIView *redBtn=[self.view viewWithTag:kRedBtnTag];     CGAffineTransform transForm=redBtn.transform;     redBtn.transform=CGAffineTransformRotate(transForm, sender.tag==7?-M_PI_4:M_PI_4);     [UIView commitAnimations]; }

缩放

#pragma mark 改变组件大小 - (IBAction)changeSize:(UIButton *)sender {      UIView *redBtn=[self.view viewWithTag:kRedBtnTag];     [UIView beginAnimations:nil context:nil];     [UIView setAnimationDuration:.8];     //缩放开始      CGAffineTransform  form=redBtn.transform;     if (sender.tag==9) {         redBtn.transform=CGAffineTransformScale(form, 1.5, 1.5);     }else{         redBtn.transform=CGAffineTransformScale(form, 0.8, 0.8);     }     [UIView commitAnimations]; }