尝试将 flutter_screenutil 包与 introduction_screen 包一起使用时，我在 flutter 中遇到了延迟初始化错误

Question

当我将 .w、.h、.sp 添加到 double 值时出现延迟初始化错误，例如

top: 16.h

或

right: 16.w

这是代码 https://drive.google.com/file/d/1yN2AqKF2LOMFYkX9PzsTVz_o5hktSY0D/view?usp=sharing

这些是我安装的包

dev_dependencies:
  flutter_test:
    sdk: flutter
  google_fonts: 2.1.0
  flutter_screenutil: ^5.0.0+2
  page_transition: ^2.0.4
  introduction_screen: ^2.1.0

Answer 1

您需要像示例页面中提供的那样初始化 ScreenUtil class here

class _HomePageState extends State<HomePage> {


 @override
  Widget build(BuildContext context) {

     //You need to add this line to your code
    //Set the fit size (fill in the screen size of the device in the design) If the design is based on the size of the 360*690(dp)
    ScreenUtil.init(
        BoxConstraints(
            maxWidth: MediaQuery.of(context).size.width,
            maxHeight: MediaQuery.of(context).size.height),
        designSize: Size(360, 690),
        minTextAdapt: true,
        orientation: Orientation.portrait);
    return Scaffold();
  }
}

尝试将 flutter_screenutil 包与 introduction_screen 包一起使用时，我在 flutter 中遇到了延迟初始化错误

I'm getting late initialization error in flutter when trying to use flutter_screenutil package with introduction_screen package

mobile

android

flutter