引发了另一个异常：类型'（BuildContext，int）=>动态'不是类型'（BuildContext，int）=> Widget'的子类型

Question

I would like to know why I am receiving this exception and how I can fix it ? Code snippet would be helpful

I'm working on Flutter (Channel beta, v0.6.0, on Linux, locale en_US.UTF-8)

Flutter doctor shows no issues found

Answer 1

Due to flutter updates, functions rendering widgets need to have the return type explicitly stated

Example :

If the function was previously defined as

buildPhotos(BuildContext context, int index) {
...
}

Change this to

Widget buildPhotos(BuildContext context, int index) {
...
}