自定义Footer，NoMore时，盖在列表上了

[onism0106]

自定义的Footer代码如下：

footer: BuilderFooter(
            triggerOffset: 70,
            clamping: false,
            position: IndicatorPosition.above,
            processedDuration: Duration.zero,
            builder: (context, state) {
              if (state.mode == IndicatorMode.processing) {
                return Padding(
                  padding: const EdgeInsets.only(
                    top: 12.0,
                    bottom: 12.0,
                  ),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: [
                      ExtendedImage(
                        width: 12.0,
                        height: 12.0,
                        clearMemoryCacheWhenDispose: true,
                        image: AssetImage(
                          GetExt.isDarkMode
                              ? 'res/images/dark/icon_load_more.png'
                              : 'res/images/icon_load_more.png',
                          package: 'flutter_template_sdk',
                        ),
                      ),
                      Container(
                        margin: const EdgeInsets.only(left: 8.0),
                        child: Text(
                          '正在加载',
                          style: TextStyle(
                            fontSize: 13.0,
                            color: Theme.of(context)
                                .extension<FlutterTemplateSdkColors>()!
                                .clTextLevel3,
                          ),
                        ),
                      ),
                    ],
                  ),
                );
              }
              if (state.result == IndicatorResult.noMore) {
                return Text('没有更多数据了');
              }
              return SizedBox.shrink();
            },
          ),

当列表没有更多内容时，显示了noMore的Footer，但是列表再向上滑时，Footer不动了，盖在了列表上
是哪里出问题了嘛？

[wangbf11]

我也遇见同样的问题 tabview和这个下拉刷新组件 一起用的时候必定出现

[JoinLi]

翻阅源码，发现作者的自定义footer高度需要动态计算。
简单实现如下
class CustomFooter extends Footer {
CustomFooter({ super.triggerOffset=35, super.clamping=false, super.position= IndicatorPosition.behind});

@OverRide
Widget build(BuildContext context, IndicatorState state) {
double offset = state.offset;
if (state.indicator.infiniteOffset != null &&
state.indicator.position == IndicatorPosition.locator &&
(state.mode != IndicatorMode.inactive ||
state.result == IndicatorResult.noMore)) {
offset = state.actualTriggerOffset;
}
if (IndicatorMode.processing == state.mode) {
return Container(height: offset,child: Text("加载中"),);
}
if (IndicatorResult.noMore == state.result) {
return Container(height: offset,child: Text("加载完成"),);
}
return Container();
}
}