createAnimate method
void
createAnimate()
Implementation
void createAnimate() {
controller = AnimationController(
duration: Duration(milliseconds: widget.duration), vsync: this);
// 内容放大动画
transform = Tween<double>(begin: widget.begin, end: widget.end)
.animate(CurvedAnimation(parent: controller, curve: Curves.ease));
if (widget.autoPlay) controller.forward();
}