pdf查看

ln_jq_app/ios/Runner/Info.plist

@@ -76,5 +76,11 @@
     <string>en</string>
 </array>
 
+<key>UIFileSharingEnabled</key>
+<true/>
+<!-- 允许在“文件”App中直接打开文档 -->
+<key>LSSupportsOpeningDocumentsInPlace</key>
+<true/>
+
 </dict>
 </plist>

ln_jq_app/lib/pages/b_page/site/controller.dart

@@ -3,12 +3,14 @@ import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
 import 'package:getx_scaffold/getx_scaffold.dart' as dio;
 import 'package:getx_scaffold/getx_scaffold.dart';
 import 'package:image_picker/image_picker.dart';
 import 'package:ln_jq_app/common/model/base_model.dart';
 import 'package:ln_jq_app/common/styles/theme.dart';
 import 'package:ln_jq_app/storage_service.dart';
+import 'package:path_provider/path_provider.dart';
 import 'package:photo_view/photo_view.dart';
 import 'package:photo_view/photo_view_gallery.dart';
 import 'package:pull_to_refresh/pull_to_refresh.dart';
@@ -794,54 +796,83 @@ class SiteController extends GetxController with BaseControllerMixin {
   }
 
   /// 保存图片到相册
-  Future<void> saveImageToLocal(String url) async {
+  Future<void> saveFileToLocal(String url) async {
-    // 1. 权限请求
+    try {
-    if (Platform.isAndroid) {
+      // 权限请求
-      dio.PermissionStatus status;
+      if (Platform.isAndroid) {
+        dio.PermissionStatus status;
 
-      final deviceInfo = await DeviceInfoPlugin().androidInfo;
+        final deviceInfo = await DeviceInfoPlugin().androidInfo;
-      final sdkInt = deviceInfo.version.sdkInt;
+        final sdkInt = deviceInfo.version.sdkInt;
 
-      if (sdkInt <= 32) {
+        if (sdkInt <= 32) {
-        status = await Permission.storage.request();
+          status = await Permission.storage.request();
+        } else {
+          status = await Permission.photos.request();
+        }
+
+        if (!status.isGranted) {
+          showErrorToast("请在系统设置中开启存储权限");
+          return;
+        }
       } else {
-        status = await Permission.photos.request();
+        var status = await Permission.photos.request();
+        if (!status.isGranted) {
+          showErrorToast("请在系统设置中开启相册权限");
+          return;
+        }
       }
 
-      if (!status.isGranted) {
+      showLoading("正在保存...");
-        showErrorToast("请在系统设置中开启存储权限");
+
-        return;
+      // 下载文件
+      var response = await Dio().get(
+        url,
+        options: Options(responseType: ResponseType.bytes),
+      );
+
+      final Uint8List bytes = Uint8List.fromList(response.data);
+
+      if (url.toLowerCase().endsWith('.pdf')) {
+        String? savePath;
+
+        if (Platform.isAndroid) {
+          final directory = Directory('/storage/emulated/0/Download');
+          if (!await directory.exists()) {
+            await directory.create(recursive: true);
+          }
+          final String fileName = "certificate_${DateTime.now().millisecondsSinceEpoch}.pdf";
+          savePath = "${directory.path}/$fileName";
+        } else {
+          // iOS: 保存到文档目录
+          final directory = await getApplicationDocumentsDirectory();
+          final String fileName = "certificate_${DateTime.now().millisecondsSinceEpoch}.pdf";
+          savePath = "${directory.path}/$fileName";
+        }
+
+        final File file = File(savePath);
+        await file.writeAsBytes(bytes);
+
+        dismissLoading();
+        showSuccessToast(Platform.isAndroid ? "PDF已保存至系统下载目录" : "PDF已保存，请在'文件'App中查看");
+      } else {
+        // 保存图片到相册
+        final result = await SaverGallery.saveImage(
+          bytes,
+          quality: 100,
+          fileName: "certificate_${DateTime.now().millisecondsSinceEpoch}",
+          skipIfExists: false,
+        );
+        dismissLoading();
+        if (result.isSuccess) {
+          showSuccessToast("图片已保存至相册");
+        } else {
+          showErrorToast("保存失败");
+        }
       }
-    } else {
+    } catch (e) {
-      var status = await Permission.photos.request();
+      dismissLoading();
-      if (!status.isGranted) {
+      showErrorToast("保存异常");
-        showErrorToast("请在系统设置中开启相册权限");
-        return;
-      }
-    }
-
-    showLoading("正在保存...");
-
-    // 2. 下载图片
-    var response = await Dio().get(
-      url,
-      options: Options(responseType: ResponseType.bytes),
-    );
-
-    // 3. 保存到相册
-    final result = await SaverGallery.saveImage(
-      Uint8List.fromList(response.data),
-      quality: 100,
-      fileName: "certificate_${DateTime.now().millisecondsSinceEpoch}",
-      skipIfExists: false,
-    );
-
-    dismissLoading();
-
-    if (result.isSuccess) {
-      showSuccessToast("图片已保存至相册");
-    } else {
-      showErrorToast("保存失败");
     }
   }
 
@@ -888,12 +919,30 @@ class SiteController extends GetxController with BaseControllerMixin {
                     child: PhotoViewGallery.builder(
                       scrollPhysics: const BouncingScrollPhysics(),
                       builder: (BuildContext context, int index) {
+                        final String url = images[index];
+                        final bool isPdf = url.toLowerCase().endsWith('.pdf');
+
+                        if (isPdf) {
+                          return PhotoViewGalleryPageOptions.customChild(
+                            child: GestureDetector(
+                              onTap: (){
+                                _showSaveMenu(url);
+                              },
+                              child: _buildPdfPreview(url),),
+                            initialScale: PhotoViewComputedScale.contained,
+                            heroAttributes: PhotoViewHeroAttributes(tag: url),
+                            onTapDown: (context, details, controllerValue) {
+                              _showSaveMenu(url);
+                            },
+                          );
+                        }
+
                         return PhotoViewGalleryPageOptions(
-                          imageProvider: NetworkImage(images[index]),
+                          imageProvider: NetworkImage(url),
                           initialScale: PhotoViewComputedScale.contained,
-                          heroAttributes: PhotoViewHeroAttributes(tag: images[index]),
+                          heroAttributes: PhotoViewHeroAttributes(tag: url),
                           onTapDown: (context, details, controllerValue) {
-                            _showSaveImageMenu(images[index]);
+                            _showSaveMenu(url);
                           },
                         );
                       },
@@ -939,7 +988,38 @@ class SiteController extends GetxController with BaseControllerMixin {
     );
   }
 
-  void _showSaveImageMenu(String url) {
+  /// PDF 预览小部件
+  Widget _buildPdfPreview(String url) {
+    return FutureBuilder<String>(
+      future: _downloadPdf(url),
+      builder: (context, snapshot) {
+        if (snapshot.connectionState == ConnectionState.waiting) {
+          return const Center(child: CircularProgressIndicator(color: Colors.white));
+        }
+        if (snapshot.hasError || snapshot.data == null) {
+          return const Center(child: Text("PDF 加载失败", style: TextStyle(color: Colors.white)));
+        }
+        return PDFView(
+          filePath: snapshot.data!,
+          enableSwipe: false,
+          swipeHorizontal: false,
+          autoSpacing: false,
+          pageFling: false,
+        );
+      },
+    );
+  }
+
+  Future<String> _downloadPdf(String url) async {
+    final file = File('${(await getTemporaryDirectory()).path}/${url.hashCode}.pdf');
+    if (await file.exists()) return file.path;
+    var response = await Dio().get(url, options: Options(responseType: ResponseType.bytes));
+    await file.writeAsBytes(response.data);
+    return file.path;
+  }
+
+  void _showSaveMenu(String url) {
+    final bool isPdf = url.toLowerCase().endsWith('.pdf');
     Get.bottomSheet(
       Container(
         color: Colors.white,
@@ -949,10 +1029,10 @@ class SiteController extends GetxController with BaseControllerMixin {
             children: [
               ListTile(
                 leading: const Icon(Icons.download),
-                title: const Text('保存图片到相册'),
+                title: Text(isPdf ? '保存 PDF 文件' : '保存图片到相册'),
                 onTap: () {
                   Get.back();
-                  saveImageToLocal(url);
+                  saveFileToLocal(url);
                 },
               ),
               const Divider(height: 1),

ln_jq_app/pubspec.lock

@@ -798,7 +798,7 @@ packages:
     source: hosted
     version: "1.1.0"
   path_provider:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path_provider
       sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"

ln_jq_app/pubspec.yaml

@@ -54,7 +54,7 @@ dependencies:
   pull_to_refresh: ^2.0.0
   flutter_app_update: ^3.2.2
   saver_gallery: ^4.0.0
-
+  path_provider: ^2.1.5
 
 dev_dependencies:
   flutter_test: