Flutter报错信息Unhandled Exception: Binding has not yet been initialized.

错误信息如下：

Typically, this is done by calling "WidgetsFlutterBinding.ensureInitialized()" or "runApp()" (the latter calls the former). Typically this call is done in the "void main()" method. The "ensureInitialized" method is idempotent; calling it multiple times is not harmful.

需要在调用之前初始化

WidgetsFlutterBinding.ensureInitialized()