a UIButton with shape change,tintColor change animation
since the button frame will change during animation,the autolayout framework cannot work approprately with this button.please try using frame to locate button. 因为button的frame会在动画过程中改变 所以自动布局系统不能工作 请用frame来定位button
please feel free to modify according to your requirement 请自由按照你的需求随意修改
pop() pop animation 放大动画 shrink shrink animation 缩小动画