设置拾取的图像时出现此错误，future dynamic不是字符串的子类型.
这是我设置图像的方式
This is how am saving the image path using shared preferences
我哪里会出错？
设置拾取的图像时出现此错误，future dynamic不是字符串的子类型.
这是我设置图像的方式
This is how am saving the image path using shared preferences
我哪里会出错？
这是因为GetImagePathFromSharedReferences不返回字符串？，它返回一个future
您可以在initState中处理异步任务，也可以使用FutureBuilder
make sure to set the return type of getImagePathFromSharedPreferences
Future<String?> getImagePathFromSharedPreferences() async {
// ...
}
我将使用FutureBuilder:
FutureBuilder<String?>(
future: getImagePathFromSharedPreferences(),
initialData: null,
builder: (
BuildContext context,
AsyncSnapshot<String?> snapshot,
) {
if (snapshot.connectionState != ConnectionState.done) {
return const CircularProgressIndicator();
} else if (!snapshot.hasError) {
return CircleAvatar(
radius: 45.0,
backgroundImage: _imageFile != null
? Image.file(_imageFile).image
: snapshot.hasData
? FileImage(snapshot.data!)
: AssetImage(_imageUrl),
);
} else {
return const Text('Error');
}
},
),