HarmonyOS鸿蒙Next中碰到一个很奇怪的问题关于WithTheme的，使用@LocalBuilder它样式不更新，使用@Builder它的样式更新但是this指向又有问题

HarmonyOS鸿蒙Next中碰到一个很奇怪的问题关于WithTheme的，使用@LocalBuilder它样式不更新，使用@Builder它的样式更新但是this指向又有问题

点击按钮切换样式，builder1是@Builder它的颜色样式更新了，但是由于this指向的问题它拿不到样式的颜色值（builder1是按钮上显示的是undefined）；

builder2是@LocalBuilder它的颜色样式没有更新，由于this指向没问题它拿到了样式的颜色值。

这个builder1和builder2都属于WithTheme下的子组件，按道理来讲builder1和builder2都应该更新样式的

```typescript
import { CustomColors, CustomTheme } from '[@kit](/user/kit).ArkUI';

class AppColors implements CustomColors {
  fontPrimary: ResourceColor = Color.Blue;
  backgroundEmphasize: ResourceColor = Color.Blue;
}

class AppColorsSec implements CustomColors {
  fontPrimary: ResourceColor = Color.Orange;
  backgroundEmphasize: ResourceColor = Color.Orange;
}

class AppTheme implements CustomTheme {
  public colors: AppColors = new AppColors();
}

class AppThemeSec implements CustomTheme {
  public colors: AppColors = new AppColorsSec();
}

[@Entry](/user/Entry)
[@Component](/user/Component)
struct DisplayPage {
  [@State](/user/State) customTheme: CustomTheme = new AppTheme();
  message: string = '设置应用局部页面自定义主题风格';
  count = 0;

  build() {
    WithTheme({ theme: this.customTheme }) {
      Column() {
        Text('WithTheme')
          .fontSize(30)
          .margin({ bottom: 10 })
        Text(this.message)
          .margin({ bottom: 10 })
        Button('change theme').onClick(() => {
          this.count++;
          if (this.count > 1) {
            this.count = 0;
          }
          switch (this.count) {
            case 0:
              this.customTheme = new AppTheme();
              break;
            case 1:
              this.customTheme = new AppThemeSec();
              break;
          }
        })

        MyComponent({
          view1: this.builder1,
          view2: this.builder2,
        }).margin({ top: 30 })

      }.width('100%')
      .height('100%')
    }
  }

  [@Builder](/user/Builder)
  builder1() {
    Column() {
      Text('builder1')
        .fontSize(30)
        .margin({ top: 30, bottom: 10 })
      Button(`backgroundEmphasize:${this.customTheme?.colors?.backgroundEmphasize}`)
    }
    .width('100%')
  }

  [@LocalBuilder](/user/LocalBuilder)
  builder2() {
    Column() {
      Text('builder2')
        .fontSize(30)
        .margin({ top: 30, bottom: 10 })
      Button(`backgroundEmphasize:${this.customTheme?.colors?.backgroundEmphasize}`)
    }
    .width('100%')
  }
}

[@Component](/user/Component)
struct MyComponent {
  [@BuilderParam](/user/BuilderParam) view1: () => void
  [@BuilderParam](/user/BuilderParam) view2: () => void

  build() {
    Column() {
      this.view1()
      this.view2()
    }.width('100%')
  }
}