满足条件后如何让卡片自动旋转？

问题描述

fl = open('stocks.txt','r')

mas = []

for l in fl:
    mas += [l]

for i in mas:
    i = i.split(',')
    print(i[1])

解决方法

double _rotateFactor = 0.5;

void _changeAngle(double factor){
  _rotateFactor = factor;
  setState((){});
}

...

Widget buildTarget(CardItem? item) {
    if (item != null) {
      return Transform(
          alignment: FractionalOffset.center,transform: Matrix4.identity()
            ..setEntry(3,2,0.002)
            ..rotateY(pi*_rotateFactor),child: Padding(
            padding: const EdgeInsets.all(8.0),child: ClipRRect(
              child: Container(
                height: 150,width: 150,color: Colors.white,child:Center(child: Image.asset(item.imageUrl)),),));
    } else {
      return Text('Errors');
    }