flutter - Flutter Qs：图像预览与 SizedBox 大小不同

Question

所以我想让人们从相机或画廊拍摄的照片填满 Sizedbox，但它没有。

这是我的预览图像代码

Widget _previewImages() {
    final Text? retrieveError = _getRetrieveErrorWidget();
    if (retrieveError != null) {
      return retrieveError;
    }
    if (_imageFileList != null) {
      return Semantics(
          child: ListView.builder(
            key: UniqueKey(),
            itemBuilder: (context, index) {
              return Semantics(
                label: 'image_picker_example_picked_image',
                child: kIsWeb
                    ? Image.network(_imageFileList![index].path)
                    : Image.file(File(_imageFileList![index].path)),
              );
            },
            itemCount: _imageFileList!.length,
          ),
          label: 'image_picker_example_picked_images');
    } else if (_pickImageError != null) {
      return Text(
        'Pick image error: $_pickImageError',
        textAlign: TextAlign.center,
      );
    } 
  }

这就是我所说的

SizedBox(
                          width: 80.w,
                          height: 22.h,
                          child: !kIsWeb &&
                                  defaultTargetPlatform ==
                                      TargetPlatform.android
                              ? FutureBuilder<void>(
                                  future: retrieveLostData(),
                                  builder: (BuildContext context,
                                      AsyncSnapshot<void> snapshot) {
                                    switch (snapshot.connectionState) {
                                      case ConnectionState.none:
                                      case ConnectionState.waiting:
                                        return const Text(
                                          'You have not yet picked an image.',
                                          textAlign: TextAlign.center,
                                        );
                                      case ConnectionState.done:
                                        return _handlePreview();
                                      default:
                                        if (snapshot.hasError) {
                                          return Text(
                                            'Pick image/video error: ${snapshot.error}}',
                                            textAlign: TextAlign.center,
                                          );
                                        } else {
                                          return const Text(
                                            'You have not yet picked an image.',
                                            textAlign: TextAlign.center,
                                          );
                                        }
                                    }
                                  },
                                )
                              : _handlePreview(),
                        )

我把_previewImages()里面的其他小部件

Widget _handlePreview() {
    return _previewImages();
  }

我也想保留人们正在拍摄的照片被迫被美化

标签： flutterdart