Flutter图像缩放插件gr_zoom的使用

Flutter图像缩放插件gr_zoom的使用

插件介绍

gr_zoom 是一个用于Flutter的图像缩放插件，它可以帮助开发者在应用中实现图像放大和缩小的功能。该插件支持Android和iOS平台，并且需要根据平台进行相应的配置。

安装插件

1. 从pub.dev安装

   flutter pub run gr_zoom:unzip_zoom_sdk
   

2. 从GitHub安装

   gr_zoom:
     git:
       url: git@github.com:25LucasAnselmo/gr_zoom.git
       ref: main
   

   然后运行以下命令：

   flutter pub run gr_zoom:unzip_zoom_sdk
   

iOS配置

• 在ios/Runner/Info.plist中添加两行：

  • NSCameraUsageDescription 和 NSMicrophoneUsageDescription

• 或者在XML格式中添加这两行：

  <key>NSCameraUsageDescription</key>
  <string>Need to use the camera for call</string>
  <key>NSMicrophoneUsageDescription</key>
  <string>Need to use the microphone for call</string>
  

• 在ios/Podfile中禁用BITCODE：

  post_install do |installer|
    installer.pods_project.targets.each do |target|
      flutter_additional_ios_build_settings(target)
      if target.name == "gr_zoom"
        puts("Found target membership zoom.")
        all_filerefs = installer.pods_project.files
        all_filerefs.each do |fileref|
          if fileref.path.end_with? "MobileRTC.xcframework"
            puts("Found MobileRTC.xcframework fileref.")
            build_phase = target.frameworks_build_phase
            puts("Determining if zoom build phase needs correction.")
            unless build_phase.files_references.include?(fileref)
              puts("Adding MobileRTC.xcframework to zoom target")
              build_phase.add_file_reference(fileref)
            end
          end
        end
        installer.pods_project.build_configurations.each do |config|
          config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64"
        end
      end
      target.build_configurations.each do |config|
        config.build_settings['ENABLE_BITCODE'] = 'NO'
      end
    end
  end
  

• 测试iOS模拟器时需确保已将iOS Dev Zoom SDK作为依赖项。

  flutter pub run gr_zoom:unzip_zoom_sdk dev
  

  要切换回正常Zoom SDK，请运行：

  flutter pub run gr_zoom:unzip_zoom_sdk
  

Android配置

• 将最小Android SDK版本更改为至少24（21）。

  minSdkVersion 24
  

• 在android/app/build.gradle中禁用shrinkResources为发布构建

  buildTypes {
    release {
      // TODO: Add your own signing config for the release build.
      // Signing with the debug keys for now, so `flutter run --release` works.
      signingConfig signingConfigs.debug
      shrinkResources false 
      minifyEnabled false
    }
  }
  

示例代码

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:gr_zoom/gr_zoom.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  final _grZoomPlugin = Zoom();

  @override
  void initState() {
    super.initState();
    initPlatformState();
  }

  Future<void> initPlatformState() async {
    String platformVersion;
    try {
      platformVersion =
          await _grZoomPlugin.getPlatformVersion() ?? 'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Text('Running on: $_platformVersion\n'),
        ),
      ),
    );
  }
}

使用示例

1. 创建SDK App JWT Token

   • 创建SDK Key&Secret
   • 生成JWT Token
   • 替换zoom/example/lib/join_screen.dart中的your jwtToken。

2. 使用JWT Token

ZoomOptions zoomOptions = new ZoomOptions(
  domain: "zoom.us",
  jwtToken: "your jwtToken (SDK Key + SDK Secret) or (Client ID + Client Secret)",
);