如何让一个View旋转并缩小

[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];