1/* 2 * Copyright (c) 2025 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16import { UIUtils as utils } from '@ohos.arkui.StateManagement'; 17 18class Info { 19 id: number = 0; 20 constructor(id: number) { 21 this.id = id; 22 } 23} 24 25@Entry 26@ComponentV2 27struct Index { 28 @Local message: Info = utils.makeObserved(new Info(20)); 29 build() { 30 Column() { 31 Button(`change id`).onClick(() => { 32 this.message.id++; 33 }) 34 Button(`change Info ${this.message.id}`).onClick(() => { 35 this.message = new Info(30); 36 }) 37 Button(`change Info ${this.message.id}`).onClick(() => { 38 this.message = utils.makeObserved(new Info(30)); 39 }) 40 } 41 } 42}