diff --git "a/data/3.\345\260\217\347\250\213\345\272\217\351\253\230\351\230\266/3.\345\270\270\347\224\250API/7.\345\212\250\346\200\201\350\256\276\347\275\256\345\257\274\350\210\252\346\235\241/exercise.md" "b/data/3.\345\260\217\347\250\213\345\272\217\351\253\230\351\230\266/3.\345\270\270\347\224\250API/7.\345\212\250\346\200\201\350\256\276\347\275\256\345\257\274\350\210\252\346\235\241/exercise.md"
index 8f4795574889494664c9489df0fa17e8c66fbd41..e01ea9ca5bb7714b4c2d82bca5c2acfd2bd4db96 100644
--- "a/data/3.\345\260\217\347\250\213\345\272\217\351\253\230\351\230\266/3.\345\270\270\347\224\250API/7.\345\212\250\346\200\201\350\256\276\347\275\256\345\257\274\350\210\252\346\235\241/exercise.md"
+++ "b/data/3.\345\260\217\347\250\213\345\272\217\351\253\230\351\230\266/3.\345\270\270\347\224\250API/7.\345\212\250\346\200\201\350\256\276\347\275\256\345\257\274\350\210\252\346\235\241/exercise.md"
@@ -19,7 +19,3 @@ uni.hideHomeButton
 ### C
 
 uni.setNavigationBarTitle
-
-### D
-
-uni.showNavigationBar
\ No newline at end of file
diff --git "a/data/3.\345\260\217\347\250\213\345\272\217\351\253\230\351\230\266/5.\345\270\270\350\247\201\351\227\256\351\242\230/3.ios\350\256\276\345\244\207\351\241\265\351\235\242\345\233\236\345\274\271\345\274\200\345\205\263/exercise.md" "b/data/3.\345\260\217\347\250\213\345\272\217\351\253\230\351\230\266/5.\345\270\270\350\247\201\351\227\256\351\242\230/3.ios\350\256\276\345\244\207\351\241\265\351\235\242\345\233\236\345\274\271\345\274\200\345\205\263/exercise.md"
index 04ec0fbd8d3099aa0625a7091aad0dfe968639d1..910b38989dacf485cc1f55c089b52798d882c2f1 100644
--- "a/data/3.\345\260\217\347\250\213\345\272\217\351\253\230\351\230\266/5.\345\270\270\350\247\201\351\227\256\351\242\230/3.ios\350\256\276\345\244\207\351\241\265\351\235\242\345\233\236\345\274\271\345\274\200\345\205\263/exercise.md"
+++ "b/data/3.\345\260\217\347\250\213\345\272\217\351\253\230\351\230\266/5.\345\270\270\350\247\201\351\227\256\351\242\230/3.ios\350\256\276\345\244\207\351\241\265\351\235\242\345\233\236\345\274\271\345\274\200\345\205\263/exercise.md"
@@ -24,6 +24,6 @@ overflow-y:hidden;
 
 在pages.json中配置"scrollIndicator": "none"
 
-### C
+### D
 
-在pages.json中配置"bounce": "none"
\ No newline at end of file
+在pages.json中配置"bounce": "none"
diff --git a/data/tree.json b/data/tree.json
index c6f254cc149605759814ae9b07c10f72e41c3781..ec33625b57f904ef03da2f1cd27283ecaf8d1a01 100644
--- a/data/tree.json
+++ b/data/tree.json
@@ -29,7 +29,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -44,7 +45,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -60,7 +62,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -75,7 +78,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -90,7 +94,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -105,13 +110,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -131,7 +138,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -148,7 +156,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -163,7 +172,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -178,7 +188,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -197,7 +208,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -216,7 +228,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -232,7 +245,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -248,13 +262,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -275,7 +291,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -298,7 +315,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -314,13 +332,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -337,7 +357,8 @@
                         "app.vue"
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -349,7 +370,8 @@
                         "globaldata"
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -364,7 +386,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -380,7 +403,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -396,7 +420,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -412,19 +437,22 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             }
           ],
           "keywords_must": [],
           "keywords_forbid": [],
-          "group": 0
+          "group": 0,
+          "subtree": ""
         }
       },
       {
@@ -446,7 +474,8 @@
                         "globalstyle"
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -461,7 +490,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -476,7 +506,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -488,7 +519,8 @@
                         "easycom"
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -503,7 +535,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -524,7 +557,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -540,7 +574,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -556,7 +591,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -572,13 +608,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -598,7 +636,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -613,7 +652,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -632,7 +672,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -647,7 +688,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -662,7 +704,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -677,7 +720,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -692,7 +736,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -708,7 +753,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -724,13 +770,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -751,7 +799,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -767,7 +816,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -783,7 +833,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -799,7 +850,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -814,7 +866,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -829,7 +882,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -844,13 +898,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -878,7 +934,8 @@
                       "keywords_forbid": [
                         "api"
                       ],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -899,13 +956,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -930,7 +989,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -951,7 +1011,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -971,7 +1032,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -986,7 +1048,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1007,7 +1070,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1028,7 +1092,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1048,13 +1113,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -1079,7 +1146,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1099,7 +1167,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1120,7 +1189,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1140,7 +1210,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1160,13 +1231,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -1191,7 +1264,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1211,7 +1285,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1231,7 +1306,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1251,7 +1327,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1267,7 +1344,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1287,7 +1365,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1308,7 +1387,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1329,19 +1409,22 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             }
           ],
           "keywords_must": [],
           "keywords_forbid": [],
-          "group": 0
+          "group": 0,
+          "subtree": ""
         }
       },
       {
@@ -1367,7 +1450,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1383,7 +1467,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1399,7 +1484,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1415,13 +1501,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -1445,7 +1533,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1464,7 +1553,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1483,7 +1573,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1498,7 +1589,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1513,13 +1605,15 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   }
                 ],
                 "keywords_must": [],
                 "keywords_forbid": [],
-                "group": 0
+                "group": 0,
+                "subtree": ""
               }
             },
             {
@@ -1543,7 +1637,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1563,7 +1658,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1579,7 +1675,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1595,7 +1692,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1611,7 +1709,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1626,7 +1725,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1641,7 +1741,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1657,7 +1758,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
                   },
                   {
@@ -1672,7 +1774,8 @@
                         ]
                       ],
                       "keywords_forbid": [],
-                      "group": 0
+                      "group": 0,
+                      "subtree": ""
                     }
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