flutter之Dismissible组件

/**
 *  滑动删除
 *
 * const Dismissible({
    @required Key key,//
    @required this.child,//
    this.background,
    //滑动时组件下一层显示的内容，没有设置secondaryBackground时，从右往左或者从左往右滑动都显示该内容，设置了secondaryBackground后，从左往右滑动显示该内容，从右往左滑动显示secondaryBackground的内容
    //secondaryBackground不能单独设置，只能在已经设置了background后才能设置，从右往左滑动时显示
    this.secondaryBackground,//
    this.onResize,//组件大小改变时回调
    this.onDismissed,//组件消失后回调
    this.direction = DismissDirection.horizontal,//
    this.resizeDuration = const Duration(milliseconds: 300),//组件大小改变的时长
    this.dismissThresholds = const <DismissDirection, double>{},//
    this.movementDuration = const Duration(milliseconds: 200),//组件消失的时长
    this.crossAxisEndOffset = 0.0,//
    })
 */

Dismissible(
  key: Key('a${index}'),
  secondaryBackground: Container(
    child: Text('左滑删除', style: TextStyle(fontSize: Screen.width(32), color: Colors.white)),
    color: Colors.red,
    padding: EdgeInsets.only(right: Screen.width(10)),
    alignment: Alignment.centerRight,
  ),
  background: Container(
      child: Text('右滑删除', style: TextStyle(fontSize: Screen.width(32), color: Colors.white)),
      color: Colors.red,
      padding: EdgeInsets.only(left: Screen.width(10)),
      alignment: Alignment.centerLeft,
  ),
  onDismissed: (direction) {
    print('onDismissed');
  },
  child:
),