调用系统相机，调用系统相机拍照后，结果没有带回应用中，app进程也没了

import { BusinessError } from '@ohos.base'; 
import wantConstant from '@ohos.ability.wantConstant'; 
import common from '@ohos.app.ability.common'; 
 
@Entry 
@Component 
struct Index { 
 
  context = getContext(this) as common.UIAbilityContext 
  private TAG:string = 'takePhoto:' 
  @State url: string = '' 
  /** 
   * 拍照 
   */ 
  async takePhoto(context: common.UIAbilityContext) { 
 
    let want: object =new Object({ 
      action: wantConstant.Action.ACTION_IMAGE_CAPTURE, 
      parameters: new Object({callBundleName:"com.example.myapplication",}), 
    }); 
    return context.startAbilityForResult(want) 
      .then((result) => { 
        console.info(this.TAG, `startAbility call back , ${JSON.stringify(result)}`); 
        if (result.want != undefined && result.want.parameters != undefined && 
          result.want.parameters['resourceUri']!== undefined) { 
          this.url = result.want.parameters['resourceUri'].toString()//获取相片uri数据 
          //拍照成功 
          console.info(this.TAG, 'takePhoto successfully, takePhotoResult uri: ' + result.want.parameters['resourceUri']); 
        } 
      }).catch((error:BusinessError) => { 
        console.info(this.TAG, `startAbility error , ${JSON.stringify(error)}`); 
      }); 
  } 
 
 
  build() { 
    Column() { 
      Row() { 
        Button('点我').onClick(() => { 
          this.takePhoto(this.context); 
        }) 
      }.height('100%') 
    }.width('100%') 
  } 
}