#鸿蒙通关秘籍#如何在鸿蒙NEXT开发应用中处理网络状态订阅失败？

import connection from '@ohos.net.connection';

@Entry
@Component
struct Index {
  @State msgHistory: string = ''
  currentNet: connection.NetConnection

  build() {
    Column() {
      Text("网络状态订阅信息")
        .fontSize(14)
        .fontWeight(FontWeight.Bold)
        .width('100%')
        .textAlign(TextAlign.Center)
      Text(this.msgHistory)
        .textAlign(TextAlign.Start)
    }
  }

  listenButClick() {
    this.currentNet = connection.createNetConnection()
    this.currentNet.register((error) => {
      if (error) {
        this.msgHistory += "订阅失败: " + JSON.stringify(error) + "\r\n"
      } else {
        this.msgHistory += "订阅成功\r\n"
      }
    })
  }
}
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