fixed 9164197f from https://gitee.com/houhaoyu/docs/pulls/22676

houhaoyu@huawei.com
Signed-off-by: Nhouhaoyu <houhaoyu@huawei.com>
Change-Id: Ia4792614c39a2711f6a1a5f1106cfdce582eb240

zh-cn/application-dev/quick-start/arkts-builderparam.md

@@ -63,7 +63,7 @@
 
 - 需注意this指向正确。
 
-  以下示例中，Parent组件在调用this.componentBuilder()时，this.label指向其所属组件，即“Parent”。\@Builder componentBuilder()传给子组件\@BuilderParam aBuilder0，在Child组件中调用this.aBuilder0()时，this.label指向在Child的label，即“Child”。
+  以下示例中，Parent组件在调用this.componentBuilder()时，this.label指向其所属组件，即“Parent”。\@Builder componentBuilder()传给子组件\@BuilderParam aBuilder0，在Child组件中调用this.aBuilder0()时，this.label指向在Child的label，即“Child”。对于\@BuilderParam aBuilder1，在将this.componentBuilder传给aBuilder1时，调用bind绑定了this，因此其this.label指向Parent的label。
 
    >  **说明：**
    >
@@ -74,10 +74,12 @@
   struct Child {
     label: string = `Child`
     @BuilderParam aBuilder0: () => void;
+    @BuilderParam aBuilder1: () => void;
 
     build() {
       Column() {
         this.aBuilder0()
+        this.aBuilder1()
       }
     }
   }
@@ -94,7 +96,7 @@
     build() {
       Column() {
         this.componentBuilder()
-        Child({ aBuilder0: this.componentBuilder })
+        Child({ aBuilder0: this.componentBuilder, aBuilder1: this.componentBuilder.bind(this) })
       }
     }
   }