HarmonyOS textinput组件的text属性通过set state方式不生效

@Entry
@Component
struct TextInputPage {
  @State message: string = '';

  build() {
    Column() {
      TextInput({ text: `${this.message}` })
        .height(48)
        .onChange(str => {
          this.message = str;   //这行必须得加
          console.info('...str:' + str);
          if(str.length > 3){
            this.message = str.substring(0, 3)
          }
        })
    }
    .width('100%')
  }
}"