From ee2f1c7a12a0ef6d99eaaac6bfaccf2bb7bf294a Mon Sep 17 00:00:00 2001
From: liugang9704 <2745340733@qq.com>
Date: Wed, 6 Aug 2025 09:30:51 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E6=96=B0=E5=A2=9EFAQ=E5=90=8C=E6=BA=90?=
 =?UTF-8?q?=E4=BB=A3=E7=A0=81?=
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---
 .../main/ets/pages/FrameNodeJudgmentNode.ets  | 59 +++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 ArkUI/entry/src/main/ets/pages/FrameNodeJudgmentNode.ets

diff --git a/ArkUI/entry/src/main/ets/pages/FrameNodeJudgmentNode.ets b/ArkUI/entry/src/main/ets/pages/FrameNodeJudgmentNode.ets
new file mode 100644
index 0000000..df8f474
--- /dev/null
+++ b/ArkUI/entry/src/main/ets/pages/FrameNodeJudgmentNode.ets
@@ -0,0 +1,59 @@
+/*
+* Copyright (c) 2024 Huawei Device Co., Ltd.
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+/*
+* FAQ: FrameNode的isAttached接口是否可以判断FrameNode节点出现在屏幕上?
+*/
+
+// [Start frame_node_judgment_node]
+import { FrameNode, NodeController, UIContext } from '@kit.ArkUI';
+
+class MyNodeController extends NodeController {
+  rootNode: FrameNode | null = null;
+  node1: FrameNode | null = null;
+  node2: FrameNode | null = null;
+
+  makeNode(uiContext: UIContext): FrameNode | null {
+    this.rootNode = new FrameNode(uiContext);
+    this.node1 = new FrameNode(uiContext);
+    this.node1.commonAttribute.id('node1'); // 设置id
+    this.node2 = new FrameNode(uiContext);
+    this.node2.commonAttribute.id('node2'); // 设置id
+    this.rootNode.appendChild(this.node1); // node1在主树上，node2不在主树上
+    return this.rootNode;
+  }
+}
+
+@Entry
+@Component
+struct Index {
+  myNodeController: MyNodeController = new MyNodeController();
+
+  build() {
+    Column() {
+      NodeContainer(this.myNodeController)
+      Button('Click')
+        .onClick(() => {
+          // 如果通过getAttachedFrameNodeById获取不到节点，则说明节点没有被挂载到主树上
+          console.info('node1 is attached to main tree: ' +
+            (this.getUIContext().getAttachedFrameNodeById('node1') !== null));
+          console.info('node2 is attached to main tree: ' +
+            (this.getUIContext().getAttachedFrameNodeById('node2') !== null));
+        })
+    }
+  }
+}
+
+// [End frame_node_judgment_node]
\ No newline at end of file
-- 
Gitee