当我按下按钮上传图片时颤动崩溃

Question

我在芬兰语跟随 youtube 的代码后创建了上传页面我尝试在我的应用程序中上传图片但是当我按下我的按钮时应用程序崩溃并且与设备失去连接，所以我回去检查我的代码没有显示错误。在终端中没有显示任何信息我不知道如何解析我的代码。

这是我的代码

    class PostView extends StatefulWidget {
      @override
      State<PostView> createState() => _PostViewState();
    }
    
    class _PostViewState extends State<PostView> {
      
      List<File> _image = [];
      final ImagePicker picker = ImagePicker();
    
      Future chooseImage() async {
        final pickedFile = await picker.pickImage(source: ImageSource.gallery);
        setState(() {
          _image.add(File(pickedFile!.path));
        });
        if (pickedFile?.path == null) retrieveLostData();
      }
    
      Future<void> retrieveLostData() async {
        final LostData response = await picker.getLostData();
        if (response.isEmpty) {
          return;
        }
        if (response.file != null) {
          setState(() {
            _image.add(File(response.file!.path));
          });
        } else {
          print(response.file);
        }
      }

      @override
      Widget build(BuildContext context) {
        return Sizer(builder: (context, orientation, deviceType) {
          return Scaffold(
              body: SafeArea(
            left: false,
            right: false,
            minimum: const EdgeInsets.all(0),
            child: Container(
              padding: const EdgeInsets.symmetric(horizontal: 20),
              child: Column(
                children: [
                  const SizedBox(width: 10, height: 0),
                  Container(
                    child: Column(children: [
                      const SizedBox(width: 10, height: 10),
                      CarouselSlider(
                        items: [
                          Container(
                            margin: EdgeInsets.all(2),
                            child: StaggeredGridView.countBuilder(
                                shrinkWrap: true,
                                crossAxisCount: 2,
                                crossAxisSpacing: 12,
                                mainAxisSpacing: 12,
                                itemCount: _image.length + 1,
                                itemBuilder: (context, index) {
                                  return index == 0
                                      ? SizedBox(
                                          width: double.infinity,
                                          height: 80.0,
                                          child: OutlinedButton(
                                            child: Text(
                                              'Upload',
                                              style: TextStyle(
                                                color: HexColor("7225FF"),
                                              ),
                                            ),
                                            onPressed: () {
                                              chooseImage();
                                            },
                                            style: ElevatedButton.styleFrom(
                                              side: BorderSide(
                                                width: 1.5,
                                                color: HexColor("7225FF"),
                                              ),
                                              shape: RoundedRectangleBorder(
                                                borderRadius:
                                                    BorderRadius.circular(14.0),
                                              ),
                                            ),
                                          ))
                                      : Container(
                                          margin: EdgeInsets.all(3),
                                          decoration: BoxDecoration(
                                              image: DecorationImage(
                                                  image:
                                                      FileImage(_image[index - 1]),
                                                  fit: BoxFit.cover)),
                                        );
                                  
                                },
                                staggeredTileBuilder: (index) {
                                  return new StaggeredTile.count(
                                      1, index.isEven ? 1.2 : 1.8);
                                }),
                            
                          ),
                        ],
                        options:
                            CarouselOptions(aspectRatio: 1, viewportFraction: 1),
                      ),
                    ]),
                  ),
                ],
              ),
         ),
            ),
          ));
        });
      }
    }

这是我的 podFile 信息

# Uncomment this line to define a global platform for your project
platform :ios, '13.0'

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do
  use_frameworks!
  use_modular_headers!

  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)

    target.build_configurations.each do |config|
      # You can remove unused permissions here
      # for more infomation: https://github.com/BaseflowIT/flutter-permission-handler/blob/master/permission_handler/ios/Classes/PermissionHandlerEnums.h
      # e.g. when you don't need camera permission, just add 'PERMISSION_CAMERA=0'
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',

        'PERMISSION_MEDIA_LIBRARY=1',

      ]

    end
  end
end

info.plst

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>CFBundleDevelopmentRegion</key>
    <string>$(DEVELOPMENT_LANGUAGE)</string>
    <key>CFBundleExecutable</key>
    <string>$(EXECUTABLE_NAME)</string>
    <key>CFBundleIdentifier</key>
    <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
    <key>CFBundleInfoDictionaryVersion</key>
    <string>6.0</string>
    <key>CFBundleName</key>
    <string>alphanew</string>
    <key>CFBundlePackageType</key>
    <string>APPL</string>
    <key>CFBundleShortVersionString</key>
    <string>$(FLUTTER_BUILD_NAME)</string>
    <key>CFBundleSignature</key>
    <string>????</string>
    <key>CFBundleURLTypes</key>
    <array>
        <dict>
            <key>CFBundleURLName</key>
            <string></string>
            <key>CFBundleURLSchemes</key>
            <array>
                <string></string>
            </array>
        </dict>
        <dict>
            <key>CFBundleURLType</key>
            <array>
                <dict>
                    <key>CFBundleTypeRole</key>
                    <string>Editor</string>
                    <key>CFBundleURLSchemes</key>
                    <array>
                        <string>My firebase Reverse url</string>
                    </array>
                </dict>
            </array>
            <key>CFBundleTypeRole</key>
            <string>Editor</string>
            <key>CFBundleURLSchemes</key>
            <array>
                <string>My firebase Reverse url</string>
            </array>
        </dict>
    </array>
    <key>CFBundleVersion</key>
    <string>$(FLUTTER_BUILD_NUMBER)</string>
    <key>LSRequiresIPhoneOS</key>
    <true/>
    <key>UILaunchStoryboardName</key>
    <string>LaunchScreen</string>
    <key>UIMainStoryboardFile</key>
    <string>Main</string>
    <key>UISupportedInterfaceOrientations</key>
    <array>
        <string>UIInterfaceOrientationPortrait</string>
        <string>UIInterfaceOrientationLandscapeLeft</string>
        <string>UIInterfaceOrientationLandscapeRight</string>
    </array>
    <key>UISupportedInterfaceOrientations~ipad</key>
    <array>
        <string>UIInterfaceOrientationPortrait</string>
        <string>UIInterfaceOrientationPortraitUpsideDown</string>
        <string>UIInterfaceOrientationLandscapeLeft</string>
        <string>UIInterfaceOrientationLandscapeRight</string>
    </array>
    <key>UIViewControllerBasedStatusBarAppearance</key>
    <false/>
</dict>
</plist>

Answer 1

像这样在 PodFile 中添加权限

'PERMISSION_CAMERA=1',

供参考。 https://github.com/Baseflow/flutter-permission-handler/blob/master/permission_handler/example/ios/Podfile

当我按下按钮上传图片时颤动崩溃

flutter crash when i push Button upload image

ios

dart

firebase

flutter

imagepicker