声部切换的时候，存储缓存

src/state.ts

@@ -1523,44 +1523,56 @@ const setState = (data: any, index: number) => {
   const localStoragePlayType = localStorage.getItem("musicScorePlayType")
   if(localStoragePlayType) {
     localStorage.removeItem("musicScorePlayType")
-    state.playType = localStoragePlayType as any
-  }
-    // 根据当前文件有没有 设置当前的播放模式
-  if(state.playType === "play"){
-    if(state.music){
-      state.playSource = "music"
-    }else if(state.accompany){
-      state.playSource = "background"
+    const fields = localStoragePlayType.split(',')
+    state.playType = fields[0] as any
+    state.playSource = fields[1] as any
+  }
+  // 根据当前文件有没有 设置当前的播放模式
+  const playObj = {
+    "play_music":"music",
+    "play_background":"accompany",
+    "sing_music":"fanSong",
+    "sing_background":"banSong",
+    "sing_mingSong":"mingSong",
+  } as any
+  // 当前缓存 有值的时候 用这个，没有的时候 走筛选
+  // @ts-ignore
+  if(!state[playObj[`${state.playType}_${state.playSource}`]]){
+    if(state.playType === "play"){
+      if(state.music){
+        state.playSource = "music"
+      }else if(state.accompany){
+        state.playSource = "background"
+      }else{
+        if(state.fanSong){
+          state.playType = "sing"
+          state.playSource = "music"
+        }else if(state.banSong){
+          state.playType = "sing"
+          state.playSource = "background"
+        }else if(state.mingSong){
+          state.playType = "sing"
+          state.playSource = "mingSong"
+        }
+      }
     }else{
       if(state.fanSong){
-        state.playType = "sing"
         state.playSource = "music"
       }else if(state.banSong){
-        state.playType = "sing"
         state.playSource = "background"
       }else if(state.mingSong){
-        state.playType = "sing"
         state.playSource = "mingSong"
-      }
-    }
-  }else{
-    if(state.fanSong){
-      state.playSource = "music"
-    }else if(state.banSong){
-      state.playSource = "background"
-    }else if(state.mingSong){
-      state.playSource = "mingSong"
-    }else{
-      if(state.music){
-        state.playType = "play"
-        state.playSource = "music"
-      }else if(state.accompany){
-        state.playType = "play"
-        state.playSource = "background"
+      }else{
+        if(state.music){
+          state.playType = "play"
+          state.playSource = "music"
+        }else if(state.accompany){
+          state.playType = "play"
+          state.playSource = "background"
+        }
       }
     }
   }
-
   state.appName = "COLEXIU";
   state.detailId = data.bizId;
   state.xmlUrl = data.xmlFileUrl;

src/view/plugins/toggleMusicSheet/index.tsx

@@ -70,7 +70,7 @@ export default defineComponent({
         },
       })
       // 存储当前 模式
-      localStorage.setItem("musicScorePlayType", state.playType)
+      localStorage.setItem("musicScorePlayType", `${state.playType},${state.playSource}`)
       const _url =
         location.origin +
         location.pathname +