我正在尝试动画图标在我的应用程序每当它是被点击。我实现了我想要的简单动画，但它总是动画一次后，我来到那个屏幕。我希望每次点击iconbutton时，它都应该是动画，并且它应该顺时针旋转，持续时间为2秒，当再次按下时，它应该逆时针旋转，持续时间为2秒。请帮帮我

这里是代码的部分-

....... 
AnimationController _controller;
  Animation<double> _animation;

@override
  void initState() {
    // TODO: implement initState
    super.initState();
    _cameraController = CameraController(cameras[0], ResolutionPreset.medium, imageFormatGroup: ImageFormatGroup.jpeg);
    cameraValue = _cameraController.initialize();
    _fetchAssets();
    _controller = AnimationController(
      duration: const Duration(seconds: 2),
      vsync: this,
      value: 025,
      lowerBound: 0.0,
      upperBound: 1.0,
    )..repeat();

    _animation = CurvedAnimation(parent: _controller, curve: Curves.linear);

    _controller.forward();
  }

.......

RotationTransition(
                        turns: _animation,
                        child: IconButton(
                          icon: Icon(
                            Icons.flip_camera_ios,
                            color: Colors.white,
                            size: MediaQuery.of(context).size.width*0.07,
                          ),
                          onPressed: () async {
                            setState(() {
                              if(cameraPosition=="Rear") {
                                cameraPosition="Front";
                              }
                              else if(cameraPosition=="Front"){
                                cameraPosition="Rear";
                              }
                            });
                            _cameraController = CameraController(
                              cameras[
                                cameraPosition=="Rear" ? 0
                                : 1
                              ],
                              ResolutionPreset.medium,
                            );
                          },
                        ),
                      ),
........