Flutter：photo_view图片预览功能

导入SDK

photo_view: ^0.15.0

单张图片预览，支持放大缩小

import 'package:flutter/material.dart';
import 'package:photo_view/photo_view.dart';...
...class _MyHomePageState extends State<MyHomePage>{@overrideWidget build(BuildContext context) {return Scaffold(appBar: AppBar(title: const Text('标题'),),body: Center(child: PhotoView(imageProvider: const NetworkImage('https://cdn.uviewui.com/uview/swiper/1.jpg'),),),);}
}

多张图片预览，支持放大缩小，滑动显示

class _MyHomePageState extends State<MyHomePage>{var bannerList = ['https://cdn.uviewui.com/uview/swiper/1.jpg','https://cdn.uviewui.com/uview/swiper/2.jpg','https://cdn.uviewui.com/uview/swiper/3.jpg',];int _current = 0;@overrideWidget build(BuildContext context) {return Stack(children: [Scaffold(appBar: AppBar(title: const Text('标题'),),body: Center(child: PhotoViewGallery.builder(itemCount: bannerList.length,builder: (context,index){return PhotoViewGalleryPageOptions(imageProvider: NetworkImage(bannerList[index]));},onPageChanged: ((index){setState(() {_current = index;print('图片滑动触发：$_current');});}),pageController: PageController(initialPage: _current), // 可以配置默认显示第几张图片)),),Positioned(left: 0,bottom: 0,right: 0,child: Container(alignment: Alignment.center,child: Text('${_current+1}/${bannerList.length}',style: TextStyle(fontSize: 20,color: Colors.white,decoration: TextDecoration.none),),))],);}
}