HarmonyOS 鸿蒙Next webview刷新问题
HarmonyOS 鸿蒙Next webview刷新问题
HarmonyOS webview刷新问题?
2 回复
参考代码
import web_webview from '[@ohos](/user/ohos).web.webview';
import business_error from '[@ohos](/user/ohos).base';
[@Entry](/user/Entry)
[@Component](/user/Component)
struct WebComponent {
controller: web_webview.WebviewController = new web_webview.WebviewController();
[@State](/user/State) msg1: string = ''
[@State](/user/State) msg2: string = ''
build() {
Column() {
Text(this.msg1).fontSize(20)
Text(this.msg2).fontSize(20)
Web({ src: $rawfile('index.html'), controller: this.controller })
.javaScriptAccess(true)
.onPageEnd(e => {
try {
this.controller.runJavaScriptExt(
"test(\"" + '哈哈' + "\")",
(error, result) => {
if (error) {
let e: business_error.BusinessError = error as business_error.BusinessError;
console.error(`run JavaScript error, ErrorCode: ${e.code}, Message: ${e.message}`)
return;
}
if (result) {
try {
let type = result.getType();
switch (type) {
case web_webview.JsMessageType.STRING: {
this.msg1 = "result type:" + typeof (result.getString());
this.msg2 = "result getString:" + ((result.getString()));
break;
}
case web_webview.JsMessageType.NUMBER: {
this.msg1 = "result type:" + typeof (result.getNumber());
this.msg2 = "result getNumber:" + ((result.getNumber()));
break;
}
case web_webview.JsMessageType.BOOLEAN: {
this.msg1 = "result type:" + typeof (result.getBoolean());
this.msg2 = "result getBoolean:" + ((result.getBoolean()));
break;
}
case web_webview.JsMessageType.ARRAY_BUFFER: {
this.msg1 = "result type:" + typeof (result.getArrayBuffer());
this.msg2 = "result getArrayBuffer byteLength:" + ((result.getArrayBuffer().byteLength));
break;
}
case web_webview.JsMessageType.ARRAY: {
this.msg1 = "result type:" + typeof (result.getArray());
this.msg2 = "result getArray:" + result.getArray();
break;
}
default: {
this.msg1 = "default break, type:" + type;
break;
}
}
}
catch (resError) {
let e: business_error.BusinessError = resError as business_error.BusinessError;
console.error(`ErrorCode: ${e.code}, Message: ${e.message}`);
}
}
});
if (e) {
console.info('url: ', e.url);
}
} catch (error) {
let e: business_error.BusinessError = error as business_error.BusinessError;
console.error(`ErrorCode: ${e.code}, Message: ${e.message}`);
}
})
}
}
}
针对HarmonyOS 鸿蒙Next webview刷新问题,这通常涉及到多个层面的因素。以下是一些可能的原因及排查方向:
- 系统缓存:系统或应用缓存可能导致webview刷新异常。尝试清除缓存或重启设备,看是否能解决问题。
- 组件配置:检查webview组件的配置,确保已正确设置相关属性,如允许加载混合内容、开启数据库存储API权限等。
- 内存管理:鸿蒙系统对内存管理有严格要求,webview在内存紧张时可能无法正常刷新。优化应用内存使用,确保webview有足够的资源来刷新内容。
- 版本兼容性:确保webview组件与HarmonyOS系统的版本兼容。有时,系统更新或组件更新可能引入新的兼容性问题。
如果上述方法均未能解决问题,可能是webview或系统层面的更深层次问题。此时,建议直接联系官网客服,以获取更专业的帮助。官网地址是:https://www.itying.com/category-93-b0.html。