Question

我想用performFetchWithCompletionHandler执行后台抓取，显然所有以前的解决方案都不适合我。

奇怪的是我的第一个请求是可以的，但接下来的请求不是。

我尝试使用单个SessionManager，也尝试将所有Alamofire请求出队到后台线程，并用URLSessionManager更改了URLSessionConfiguration.background(withIdentifier: "com.test.background")。

 group.enter()
 api.getClimateStateData(carId: carId, completion: { [weak self] response in
       guard let strongSelf = self else { return }
       climateModel = strongSelf.sortDataFromError(data: response)
       group.leave()
})

func getClimateStateData(carId: Int, completion: @escaping (ServiceResponse<ClimateStateModel>) -> Void) {
        let header: HTTPHeaders = ["User-Agent": UserAgentHelper.fullUserAgentString]
        request("/api/1/vehicles/\(carId)/data_request/climate_state", method: .get, parameters: nil, encoding: nil, headers: header).responseData { [weak self] response in
            guard let strongSelf = self else { return }
            completion(strongSelf.completionResponse(response))
     }
}

    @discardableResult private func request(
        _ path: String,
        method: HTTPMethod,
        parameters: Parameters? = nil,
        encoding: ParameterEncoding? = nil,
        headers: HTTPHeaders? = nil)
        -> DataRequest {
            let userEncoding = encoding ?? self.defaultEncoding
            print("Asking: " + path)
            return Service.sessionManager2.request("\(API)\(path)", method: method, parameters: parameters, encoding: userEncoding, headers: headers).validate()
}

我希望这些请求得到满足。

感谢您的时间！

Answer 1

我不好，这是由于self = nil。

由于某些原因，self被取消了初始化。

Alamofire后台抓取不会处理其他请求

1 个答案: