Futter全屏显示图像，获取偏移量和比例因子

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Image.asset(
          'assets/images/image.jpg',
          fit: BoxFit.fill,
        ),
      ),
    );
  }
}

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: GestureDetector(
          onScaleUpdate: (ScaleUpdateDetails details) {
            double scale = details.scale;
            Offset offset = details.focalPoint;
            // 处理偏移量和比例因子
            // ...
          },
          child: Image.asset(
            'assets/images/image.jpg',
            fit: BoxFit.fill,
          ),
        ),
      ),
    );
  }
}