docs: 修复一处表单二开的错误

docs/表单二开/1_拆分表单.md

@@ -69,15 +69,20 @@ export default {
     mixins: [SimpleFormSetup],
     setup(props, ctx) {
         const ret = SimpleForm.setup(props, ctx);
-        const schemaMap = {};
-        ret.getSchemas._value.forEach((schema) => {
-            schemaMap[schema.key] = schema;
-        });
         return {
-            schemaMap,
             ...ret
         };
     },
+    computed: {
+        // 这里需要增加一个计算属性 否则流程关联时字段读写状态会失效
+        schemaMap() {
+            const schemaMap = {};
+            this.getSchemas.forEach((schema) => {
+                schemaMap[schema.key] = schema;
+            });
+            return schemaMap;
+        }
+    },
     methods: {
         getIfShow2: function (key) {
             return this.getIfShow(this.schemaMap[key], this.formModel[this.schemaMap[key].field]);