HarmonyOS 单行超长文本换行不生效

设置超出n个字符数目，出省略号：

measure(str:string,fontnum:number,fontSize:number,padding:number){
  return px2vp(measure.measureText({
    textContent: str.substring(0,fontnum+1),
    fontSize: fontSize
  })+padding*2)
}
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