温馨提示:本篇博客的详细代码已发布到 git : https://gitcode.com/nutpi/HarmonyosNext 可以下载运行哦!
// 操作状态枚举
enum OperationStatus {
IDLE, // 空闲状态
PRESSING, // 长按状态
MOVING, // 移动状态
DROPPING, // 放置状态
DELETE // 删除状态
}
// 组件状态
@Observed
export class ListExchangeCtrl<T> {
// 列表数据
private deductionData: Array<T> = [];
// 当前状态
state: OperationStatus = OperationStatus.IDLE;
// 偏移量
offsetY: number = 0;
}
class StateManager {
private static instance: StateManager;
private currentState: OperationStatus = OperationStatus.IDLE;
private listeners: Set<(state: OperationStatus) => void> = new Set();
static getInstance(): StateManager {
if (!StateManager.instance) {
StateManager.instance = new StateManager();
}
return StateManager.instance;
}
setState(newState: OperationStatus): void {
this.currentState = newState;
this.notifyListeners();
}
private notifyListeners(): void {
this.listeners.forEach(listener => listener(this.currentState));
}
}
@Observed
export class ListInfo {
icon: ResourceStr = '';
name: ResourceStr = '';
constructor(icon: ResourceStr = '', name: ResourceStr = '') {
this.icon = icon;
this.name = name;
}
}
class StateObserver {
// 监听状态变化
static observe(target: any, callback: () => void): void {
Watch(target)(() => {
callback();
})
}
// 取消监听
static unobserve(target: any): void {
// 取消监听逻辑
}
}
class ListExchangeCtrl<T> {
// 更新状态
private updateState(newState: OperationStatus): void {
// 状态转换验证
if (this.isValidStateTransition(this.state, newState)) {
this.state = newState;
this.handleStateChange();
}
}
// 验证状态转换
private isValidStateTransition(
currentState: OperationStatus,
newState: OperationStatus
): boolean {
// 状态转换验证逻辑
return true;
}
}
class BatchUpdater {
private static updates: Array<() => void> = [];
private static isProcessing: boolean = false;
static addUpdate(update: () => void): void {
this.updates.push(update);
this.processUpdates();
}
private static async processUpdates(): Promise<void> {
if (this.isProcessing) return;
this.isProcessing = true;
while (this.updates.length > 0) {
const update = this.updates.shift();
await update();
}
this.isProcessing = false;
}
}
class UISynchronizer {
// 同步UI状态
static syncUI(state: OperationStatus): void {
switch (state) {
case OperationStatus.PRESSING:
this.applyPressingStyle();
break;
case OperationStatus.MOVING:
this.applyMovingStyle();
break;
case OperationStatus.DROPPING:
this.applyDroppingStyle();
break;
default:
this.applyDefaultStyle();
}
}
private static applyPressingStyle(): void {
// 应用长按状态样式
}
}
class DataSynchronizer {
// 同步数据状态
static syncData(data: Array<any>): void {
// 数据同步逻辑
}
// 处理数据冲突
static resolveConflict(localData: any, remoteData: any): any {
// 冲突解决逻辑
return mergedData;
}
}
class StatePersistence {
// 保存状态
static async saveState(state: any): Promise<void> {
try {
await localStorage.setItem('appState', JSON.stringify(state));
} catch (error) {
console.error('Failed to save state:', error);
}
}
// 恢复状态
static async restoreState(): Promise<any> {
try {
const state = await localStorage.getItem('appState');
return JSON.parse(state);
} catch (error) {
console.error('Failed to restore state:', error);
return null;
}
}
}
class StateRecovery {
// 恢复到上一个状态
static async recoverToPreviousState(): Promise<void> {
const previousState = await StatePersistence.restoreState();
if (previousState) {
StateManager.getInstance().setState(previousState);
}
}
}
class StateCache {
private static cache: Map<string, any> = new Map();
static set(key: string, value: any): void {
this.cache.set(key, value);
}
static get(key: string): any {
return this.cache.get(key);
}
static clear(): void {
this.cache.clear();
}
}
class UpdateOptimizer {
private static updateQueue: Array<() => void> = [];
private static updateScheduled: boolean = false;
static scheduleUpdate(update: () => void): void {
this.updateQueue.push(update);
if (!this.updateScheduled) {
this.updateScheduled = true;
requestAnimationFrame(() => this.processUpdates());
}
}
private static processUpdates(): void {
while (this.updateQueue.length > 0) {
const update = this.updateQueue.shift();
update();
}
this.updateScheduled = false;
}
}
本篇教程详细介绍了:
下一篇将介绍列表项操作的实现细节。
原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。
原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。
扫码关注腾讯云开发者
领取腾讯云代金券
Copyright © 2013 - 2025 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有
深圳市腾讯计算机系统有限公司 ICP备案/许可证号:粤B2-20090059 深公网安备号 44030502008569
腾讯云计算(北京)有限责任公司 京ICP证150476号 | 京ICP备11018762号 | 京公网安备号11010802020287
Copyright © 2013 - 2025 Tencent Cloud.
All Rights Reserved. 腾讯云 版权所有