Fix Flutter TTS example for iOS (#1090)

README.md

@@ -79,9 +79,23 @@ with the following APIs
 
 ### Links for pre-built Flutter APPs
 
-| Description                    | URL                                                                                     | 中国用户                                                                             |
-|--------------------------------|-----------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------|
-| Streaming speech recognition             | [Address](https://k2-fsa.github.io/sherpa/onnx/flutter/asr/app.html)                        | [点此](https://k2-fsa.github.io/sherpa/onnx/flutter/asr/app-cn.html)                        |
+#### Real-time speech recognition
+
+| Description                    | URL                                                                 | 中国用户                                                            |
+|--------------------------------|---------------------------------------------------------------------|---------------------------------------------------------------------|
+| Streaming speech recognition   | [Address](https://k2-fsa.github.io/sherpa/onnx/flutter/asr/app.html)| [点此](https://k2-fsa.github.io/sherpa/onnx/flutter/asr/app-cn.html)|
+
+#### Text-to-speech
+
+| Description                    | URL                                                          | 中国用户                                                                    |
+|--------------------------------|--------------------------------------------------------------|-----------------------------------------------------------------------------|
+| Android (arm64-v8a, armeabi-v7a, x86_64) | [Address](https://k2-fsa.github.io/sherpa/onnx/flutter/tts-android.html) | [点此](https://k2-fsa.github.io/sherpa/onnx/flutter/tts-android-cn.html)|
+| Linux (x64)    | [Address](https://k2-fsa.github.io/sherpa/onnx/flutter/tts-linux.html)       | [点此](https://k2-fsa.github.io/sherpa/onnx/flutter/tts-linux-cn.html)      |
+| macOS (x64)    | [Address](https://k2-fsa.github.io/sherpa/onnx/flutter/tts-macos-x64.html)   | [点此](https://k2-fsa.github.io/sherpa/onnx/flutter/tts-macos-x64-cn.html)  |
+| macOS (arm64)  | [Address](https://k2-fsa.github.io/sherpa/onnx/flutter/tts-macos-arm64.html) | [点此](https://k2-fsa.github.io/sherpa/onnx/flutter/tts-macos-arm64-cn.html)|
+| Windows (x64)  | [Address](https://k2-fsa.github.io/sherpa/onnx/flutter/tts-win.html)         | [点此](https://k2-fsa.github.io/sherpa/onnx/flutter/tts-win-cn.html)        |
+
+> Note: You need to build from source for iOS.
 
 ### Links for pre-trained models
 

flutter-examples/tts/README.md

@@ -10,6 +10,12 @@ It works on the following platforms:
   - macOS (both arm64 and x86_64 are supported)
   - Windows
 
+Screenshots are given below:
+
+|Android|iOS|Linux|macOS|Windows|
+|-------|---|-----|-----|-------|
+|![](./android.jpg)|![](./ios.jpg)|![](./ubuntu.jpg)|![](./macos.jpg)|![](./windows.jpg)|
+
 ## How to build
 
 Before you run `flutter build`, you have to select a TTS model and change
@@ -108,8 +114,75 @@ flutter build apk --split-per-abi
 
   - 5. For iOS
 
+First, connect your iPhone to your computer and use `flutter devices` to show
+available devices. You will see something like below:
+
+```
+Found 3 connected devices:
+  iPhone (mobile) • 00008030-001064212E85802E • ios            • iOS 16.3 20D47
+  macOS (desktop) • macos                     • darwin-x64     • macOS 13.1 22C65 darwin-x64
+  Chrome (web)    • chrome                    • web-javascript • Google Chrome 126.0.6478.127
+
+No wireless devices were found.
+
+Run "flutter emulators" to list and start any available device emulators.
+
+If you expected another device to be detected, please run "flutter doctor" to diagnose potential issues. You may also try increasing the time to wait for connected devices with the "--device-timeout" flag. Visit https://flutter.dev/setup/ for troubleshooting tips.
+```
+
+Then you can use
+```
+flutter run -d 00008030-001064212E85802E --release
+```
+
+You would see something like below:
+```
+Launching lib/main.dart on iPhone in release mode...
+Automatically signing iOS for device deployment using specified development team in Xcode project: N5ZH3Z63A6
+Running pod install...                                           1,773ms
+Running Xcode build...
+Xcode build done.                                            7.9s
+Failed to build iOS app
+Could not build the precompiled application for the device.
+Error (Xcode): No profiles for 'com.k2fsa.sherpa.onnx.tts' were found: Xcode couldn't find any iOS App Development provisioning profiles matching
+'com.k2fsa.sherpa.onnx.tts'. Automatic signing is disabled and unable to generate a profile. To enable automatic signing, pass
+-allowProvisioningUpdates to xcodebuild.
+/Users/fangjun/open-source/sherpa-onnx/flutter-examples/tts/ios/Runner.xcodeproj
+
+
+
+It appears that there was a problem signing your application prior to installation on the device.
+
+Verify that the Bundle Identifier in your project is your signing id in Xcode
+  open ios/Runner.xcworkspace
+
+Also try selecting 'Product > Build' to fix the problem.
+
+Error running application on iPhone.
+```
+
+After you have followed the instructions in the above log, run gain
+
+> Note: I have run `open ios/Runner.xcworkspace` and click `Product -> Build`.
+
+```
+flutter run -d 00008030-001064212E85802E --release
+```
+
+Finally, it will show something like below:
+
 ```
-flutter build ios
+Launching lib/main.dart on iPhone in release mode...
+Automatically signing iOS for device deployment using specified development team in Xcode project: N5ZH3Z63A6
+Running Xcode build...
+ └─Compiling, linking and signing...                         6.5s
+Xcode build done.                                           18.3s
+Installing and launching...                                        22.9s
+
+Flutter run key commands.
+h List all available interactive commands.
+c Clear the screen
+q Quit (terminate the application on the device).
 ```
 
 ## Fix for Linux

flutter-examples/tts/ios/Runner.xcodeproj/project.pbxproj

@@ -373,6 +373,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
+				OTHER_LDFLAGS = "-lc++";
 				VERSIONING_SYSTEM = "apple-generic";
 			};
 			name = Profile;
@@ -390,6 +391,7 @@
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 5.0;
+				OTHER_LDFLAGS = "-lc++";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Runner.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Runner";
 			};
 			name = Debug;
@@ -405,6 +407,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.k2fsa.sherpa.onnx.tts.RunnerTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
+				OTHER_LDFLAGS = "-lc++";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Runner.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Runner";
 			};
 			name = Release;
@@ -420,6 +423,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.k2fsa.sherpa.onnx.tts.RunnerTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
+				OTHER_LDFLAGS = "-lc++";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Runner.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Runner";
 			};
 			name = Profile;
@@ -554,6 +558,7 @@
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 5.0;
+				OTHER_LDFLAGS = "-lc++";
 				VERSIONING_SYSTEM = "apple-generic";
 			};
 			name = Debug;
@@ -576,6 +581,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
+				OTHER_LDFLAGS = "-lc++";
 				VERSIONING_SYSTEM = "apple-generic";
 			};
 			name = Release;

flutter-examples/tts/lib/model.dart

@@ -91,7 +91,7 @@ Future<sherpa_onnx.OfflineTts> createOfflineTts() async {
     final all = ruleFsts.split(',');
     var tmp = <String>[];
     for (final f in all) {
-      tmp.add(p.join(directory.path, modelDir, f));
+      tmp.add(p.join(directory.path, f));
     }
     ruleFsts = tmp.join(',');
   }
@@ -106,7 +106,7 @@ Future<sherpa_onnx.OfflineTts> createOfflineTts() async {
   }
 
   if (lexicon != '') {
-    lexicon = p.join(directory.path, lexicon);
+    lexicon = p.join(directory.path, modelDir, lexicon);
   }
 
   if (dataDir != '') {

flutter-examples/tts/lib/tts.dart

@@ -37,6 +37,7 @@ class _TtsScreenState extends State<TtsScreen> {
     _controller_text_input = TextEditingController();
     _controller_hint = TextEditingController();
     _controller_sid = TextEditingController(text: '0');
+
     super.initState();
   }
 
@@ -73,6 +74,9 @@ class _TtsScreenState extends State<TtsScreen> {
                   keyboardType: TextInputType.number,
                   maxLines: 1,
                   controller: _controller_sid,
+                  onTapOutside: (PointerDownEvent event) {
+                    FocusManager.instance.primaryFocus?.unfocus();
+                  },
                   inputFormatters: <TextInputFormatter>[
                     FilteringTextInputFormatter.digitsOnly
                   ]),
@@ -99,6 +103,9 @@ class _TtsScreenState extends State<TtsScreen> {
                 ),
                 maxLines: 5,
                 controller: _controller_text_input,
+                onTapOutside: (PointerDownEvent event) {
+                  FocusManager.instance.primaryFocus?.unfocus();
+                },
               ),
               const SizedBox(height: 5),
               Row(