HarmonyOS 时间戳运用

import dayjs from "dayjs"; 
 
@Entry 
@Component 
struct Index { 
  @State timeStr : number = 1318781876; 
  @State timeNow: string = '' 
  build() { 
    Row() { 
      Column() { 
        Text(`当前时间：`+this.timeNow) 
          .fontSize(20) 
          .fontWeight(FontWeight.Bold) 
          .width("100%") 
        Button("get time") 
          .onClick(() => { 
            try { 
              this.timeNow = this.getTimeToYYYYDDMMHHMMSS(this.timeStr) 
            } 
            catch (e) { 
            } 
          }) 
      } 
      .justifyContent(FlexAlign.Center) 
      .width('100%') 
    } 
    .height('100%') 
  } 
 
  getTimeToYYYYDDMMHHMMSS(str: number): string { 
    let time:string ='' 
    time = dayjs.unix(1318781876).format('YYYY-MM-DD HH:mm:ss') 
    return time 
  } 
}