我曾尝试在flutter中实现dropdownbutton,project.Dropdownbutton列表将由api填充。我已经从api中获取了列表。 但当我选择一个项目时,它不会显示。(dirty, state: _FutureBuilderState<List<Categories>>#09534):
There should be exactly one item with [DropdownButton</em
我将以下内容放在类似于下面的列中 {flutter: This probably means that it is a render object that tries to be as big as possible,but it was put
flutter: inside another render object that allows its