尝试从服务访问响应数据以显示到TodayExtenstion小部件importFoundationstructMarketIndex:Codable{letindicesName:StringletindicesValue:StringletdateValue:StringletindicesChangeValue:StringletchangePercentage:StringletindexVolume:String?}structMarketIndexCache{staticletkey="MARKET_INDEX_KEY"staticfuncsave(_value:[Marke