feat: 增加 同步语音文字显示

example/lib/main.dart

@@ -35,8 +35,10 @@ class _MyAppState extends State<MyApp> {
     _aivoicePlugin.onAsrResultReceived.listen((event) {
       final a = event["finish"];
 
+      final b = event["playWords"];
+
       setState(() {});
-      _text = "$a";
+      _text = b ?? "$a";
       // print(event["text"]);
     });
     _aivoicePlugin.prepareEnvironment({"appId": "2301072440"});

ios/Classes/TtsNovel.m

@@ -692,12 +692,8 @@ static int TTS_MAX_RETRY_COUNT = 3;
 
 // 根据 SDK 返回的播放进度高亮正在播放的文本，用红色表示
 // 根据 SDK 返回的合成开始和合成结束回调高亮正在合成的文本，用蓝色表示
--(void)updateTtsResultText:(NSString*) playingId {
-    if (self.engineErrorOccurred) {
-        NSLog(@"When a fatal error occurs, prevent the playback text from being displayed.");
-        return;
-    }
-    
+-(void)updatePlayingWords:(NSString*) playingId {
+    int synthesisIndex = self.ttsSynthesisIndex;
     NSNumber* val = [self.ttsSynthesisMap objectForKey:playingId];
     if (val != nil) {
         self.ttsPlayingIndex = [val intValue];
@@ -705,7 +701,8 @@ static int TTS_MAX_RETRY_COUNT = 3;
     
     int beginIndex = MAX(self.ttsPlayingIndex, 0);
     int maxSentencesDisplayed = MIN((int)[self.ttsSynthesisText count], 16);
-    NSMutableAttributedString *resultStr = [[NSMutableAttributedString alloc] initWithString:@""];
+   
+    NSString *resultStr = @"";
     for (int cnt = 0; cnt < maxSentencesDisplayed; ++cnt) {
         int index = (beginIndex + cnt) % [self.ttsSynthesisText count];
         NSString* current_sentence = self.ttsSynthesisText[index];
@@ -713,13 +710,11 @@ static int TTS_MAX_RETRY_COUNT = 3;
         if (index == self.ttsPlayingIndex) {
             playedPosition = MIN(ceil((double)(self.ttsPlayingProgress) * (double)([current_sentence length])), [current_sentence length]);
             NSLog(@"played position: %ld", (long)playedPosition);
-            NSString* playedString = [current_sentence substringToIndex:playedPosition];
-            NSAttributedString* playedSpan = [[NSAttributedString alloc] initWithString:playedString attributes:[NSDictionary dictionaryWithObject:[UIColor redColor] forKey:NSForegroundColorAttributeName]];
-            [resultStr appendAttributedString:playedSpan];
+            resultStr =  [resultStr stringByAppendingString:[current_sentence substringToIndex:playedPosition]];
+        }
+        if([ self.delegate respondsToSelector:@selector(onRecieve:)]) {
+            [self.delegate onRecieve:@{@"playWords": resultStr}];
         }
-        NSString* remainString = [current_sentence substringFromIndex:playedPosition];
-        NSAttributedString* span = [[NSAttributedString alloc] initWithString:remainString attributes:[NSDictionary dictionaryWithObject:[UIColor blackColor] forKey:NSForegroundColorAttributeName]];
-        [resultStr appendAttributedString:span];
     }
     //    [self.resultTextView setAttributedText:resultStr];
 }
@@ -749,7 +744,7 @@ static int TTS_MAX_RETRY_COUNT = 3;
     dispatch_async(dispatch_get_main_queue(), ^{
         //        self.pauseResumeButton.enabled = TRUE;
         self.ttsPlayingProgress = 0.0;
-        [self updateTtsResultText:playingId];
+        [self updatePlayingWords:playingId];
     });
 }
 
@@ -771,10 +766,8 @@ static int TTS_MAX_RETRY_COUNT = 3;
             NSLog(@"playing id: %@, progress in percent: %.2f", reqid, percentage);
             dispatch_async(dispatch_get_main_queue(), ^{
                 self.ttsPlayingProgress = percentage;
-                if([ self.delegate respondsToSelector:@selector(onRecieve:)]) {
-                    [self.delegate onRecieve:@{@"play_progress": @(percentage)}];
-                }
-                //                [self updateTtsResultText:reqid];
+               
+                [self updatePlayingWords:reqid];
             });
         }
     }
@@ -786,26 +779,18 @@ static int TTS_MAX_RETRY_COUNT = 3;
     //        if (![self.settings getBool:SETTING_TTS_ENABLE_DUMP_NOVEL_TTS_DETAIL]) {
     //            [self.ttsSynthesisMap removeObjectForKey:playingId];
     //        }
-    
+    [self.ttsSynthesisMap removeObjectForKey:playingId];
     dispatch_async(dispatch_get_main_queue(), ^{
         self.ttsPlayingProgress = 1.0;
-        [self updateTtsResultText:playingId];
+        [self updatePlayingWords:playingId];
+        if([[self.ttsSynthesisMap  allKeys] count] == 0) {
+            NSLog(@"这里告诉flutter 已经全部读完了");
+            [self.delegate onRecieve:@{@"finish": @(YES)}];
+        }
     });
     if (self.ttsSynthesisFromPlayer) {
-        
-        if(self.ttsSynthesisIndex == 0) {
-            // 播放完第一遍后自动停止
-            [self stopEngineBtnClicked];
-            if([self.delegate respondsToSelector:@selector(onRecieve:)]) {
-                [self.delegate onRecieve:@{@"finish" : @(true)}];
-            }
-        } else {
         [self triggerSynthesis];
         self.ttsSynthesisFromPlayer = FALSE;
-            
-        }
-        
-        
     }
 }
 
@@ -827,7 +812,9 @@ static int TTS_MAX_RETRY_COUNT = 3;
 
 - (void)synthesisNextSentence {
     self.ttsSynthesisIndex = (self.ttsSynthesisIndex + 1) % [self.ttsSynthesisText count];
-    if (!self.ttsSynthesisFromPlayer) {
+    
+    // 合成最后一条后停止
+    if (!self.ttsSynthesisFromPlayer && (self.ttsSynthesisIndex +1) < self.ttsSynthesisText.count) {
         [self triggerSynthesis];
     }
 }