@CustomDialog 内的值如何在外部进行动态修改？

import otherLoginDialog from '../component/OtherLoginDialog'  
@State loginType: string='1';  
build() {  
  Row() {  
    Column({space:20}) {  
      Text('loginType ==1')  
        .onClick(()=>{  
          this.loginType ='1'  
        })  
  
      Text('loginType ==2')  
        .onClick(()=>{  
          this.loginType ='2'  
        })  
  
      Text('loginType ==3')  
        .onClick(()=>{  
          this.loginType ='3'  
        })  
  
      otherLoginDialog({loginType:this.loginType})  
    }  
    .width('100%')  
  }  
  .height('100%')  
}

@Prop @Watch('onchange') loginType?: string = LoginConstant.SP_USER_GESTURE  
  
onchange() {  
  if (this.loginType == LoginConstant.SP_USER_GESTURE) {  
    this.image = $r("app.media.psbc_view_login_icon_gesture")  
    this.title = "启用手势登录，登录更快捷"  
    this.content = ""  
  } else if (this.loginType == LoginConstant.SP_USER_FINGER) {  
    this.image = $r("app.media.psbc_view_login_icon_finger")  
    this.title = "启用指纹登录，登录更快捷"  
    this.content = "您在当前设备的指纹信息将用于该设备的邮储信用卡App身份验证，我们仅接收指纹信息验证结果，并不收集您的指纹信息。"  
  } else if (this.loginType == LoginConstant.SP_USER_FACE) {  
    this.image = $r("app.media.psbc_view_login_icon_face")  
    this.title = "启用面容登录，登录更快捷"  
    this.content = "您在当前设备的面容信息将用于该设备的邮储信用卡App身份验证，我们仅接面容纹信息验证结果，并不收集您的面容信息。"  
  }  
}