IOS如何让一个View旋转并缩小

Question

如何让一个View旋转并缩小

 [UIView animateWithDuration:0.4 delay:0.0 options:UIViewAnimationOptionCurveEaseInOut
         animations:^(void) {
                self.lb.transform = CGAffineTransformMakeRotation(3.14f);
                self.lb.backgroundColor = [[UIColor alloc] initWithRed:220.0/255.0 green:220.0/255.0 blue:220.0/255.0 alpha:1.0];
          }completion:nil];

可以实现View的旋转，变灰。
我的需求是，旋转变灰，缩小到消失。

Answer 1

 [UIView animateWithDuration:0.4 delay:0.0 options:UIViewAnimationOptionCurveEaseInOut
          animations:^(void) {
                  CGAffineTransform t = CGAffineTransformMakeRotation(3.14f);
                  CGAffineTransformScale(t, 0, 0);
                   self.lb.transform = t;
                    self.lb.backgroundColor = [[UIColor alloc] initWithRed:220.0/255.0 green:220.0/255.0 blue:220.0/255.0 alpha:1.0];
          }completion:nil];