worker运行异常 HarmonyOS 鸿蒙Next
this.worker?.postMessage(new Transfer(‘发送消息#1’)) 这行代码运行提示异常, Error message:Obj is not a Valid object SourceCode: parent.onmessage = (message) => { ^ Stacktrace: at func_main_0 (entry/src/main/ets/TestWorker.ets:5:1) 如果注释 this.worker?.postMessage(new Transfer(‘发送消息#1’)) ,能正常运行, 请问是什么原因?怎么处理? Transfer 这个类不能序列化么?文档中说明简单对象是支持序列化的。 demo代码如下:
“buildOption”: { “sourceOption”: { “workers”: [ “./src/main/ets/TestWorker.ets” ] } },
@Entry
@Component
struct Index {
private worker?: worker.ThreadWorker
aboutToAppear(): void {
this.worker = new worker.ThreadWorker('entry/ets/TestWorker.ets');
this.worker.onmessage = (message) => {
console.error('>>>>>>>主线程收到消息了:' + JSON.stringify(message.data))
}
}
build() {
Column() {
Text('测试').onClick(() => {
this.worker?.postMessage(new Transfer('发送消息#1'))
})
}
}
}
TestWorker.ets 代码如下:
import {worker} from '@kit.ArkTS';
let parent =
worker.workerPort; // 处理来自主线程的消息 parent.onmessage = (message) => { } export class Transfer { constructor(text: string) { } }
更多关于worker运行异常 HarmonyOS 鸿蒙Next的实战系列教程也可以访问 https://www.itying.com/category-93-b0.html
给你demo进行下修改,你看一下 TestWorker.ets 代码如下:
import { ErrorEvent, MessageEvents, ThreadWorkerGlobalScope, worker } from '@kit.ArkTS';
const workerPort: ThreadWorkerGlobalScope = worker.workerPort;
/**
* Defines the event handler to be called when the worker thread receives a message sent by the host thread.
* The event handler is executed in the worker thread.
*
* @param e message data
*/
workerPort.onmessage = (e: MessageEvents) => {
// 给主线程发消息
workerPort.postMessage('success set:' + JSON.stringify(e.data.params));
console.log("worker set");
}
/**
* Defines the event handler to be called when the worker receives a message that cannot be deserialized.
* The event handler is executed in the worker thread.
*
* @param e message data
*/
workerPort.onmessageerror = (e: MessageEvents) => {
}
/**
* Defines the event handler to be called when an exception occurs during worker execution.
* The event handler is executed in the worker thread.
*
* @param e error message
*/
workerPort.onerror = (e: ErrorEvent) => {
}
目录结构
ets
--pages
--index.etx
--workers
--TestWorker.etx
// index.ets代码如下:
import { worker } from '@kit.ArkTS';
@Entry
@Component
struct Index {
build() {
Column() {
Text('测试')
.onClick(() => {
WorkerHandler.postMsg(new Transfer('发送消息#1'));
})
}
}
}
export class Transfer {
text: string
constructor(text: string) {
this.text = text
}
}
export class WorkerHandler {
private static workerS = new worker.ThreadWorker("../workers/TestWorker");
static postMsg(params: Transfer): void {
WorkerHandler.workerS.postMessage({ 'params': params });
// 给worker线程发消息
WorkerHandler.workerS.onmessage = (message): void => {
// 接收Worker子线程的结果
console.error('>>>>>>>主线程收到消息了:' + JSON.stringify(message.data))
}
}
}
更多关于worker运行异常 HarmonyOS 鸿蒙Next的实战系列教程也可以访问 https://www.itying.com/category-93-b0.html
针对您提到的“worker运行异常 HarmonyOS 鸿蒙Next”问题,以下是一些可能的解决方案和检查点:
-
任务调度与资源限制:检查worker任务是否在系统资源紧张时运行,如CPU、内存使用率高时。HarmonyOS对后台任务有严格的资源管理机制,确保前台应用流畅运行。
-
权限与声明:确认worker所需的权限是否已在manifest文件中正确声明,并获得了用户授权。HarmonyOS对权限管理有严格规定,未声明的权限将导致功能异常。
-
API兼容性:检查使用的API是否兼容当前HarmonyOS版本。HarmonyOS不断更新,某些API可能在新版本中已变更或废弃。
-
日志与调试:利用HarmonyOS提供的日志系统,查看worker运行时的详细日志,分析异常原因。同时,可以使用调试工具进行断点调试,定位问题代码。
-
生命周期管理:确保worker的生命周期管理正确,如避免在worker销毁后继续发送消息或执行操作。
-
异常处理:检查worker中的异常处理逻辑,确保在发生异常时能够正确捕获并处理,避免程序崩溃。
如果问题依旧没法解决请联系官网客服,官网地址是:https://www.itying.com/category-93-b0.html