Question

我是Swift的新手。我正在制作一个发送多个HTTP请求并收到回复的应用。

我阅读了Swift背景教程，然后在模拟器中尝试并测试它没有响应。

我也通过alamofire发送HTTP请求，我认为这没问题，因为alamofire使用了NSURL。

所以我认为我的appdelegate有一些不足之处。你能协助找出它无法正常工作的原因吗？

以下是我的应用委托代码的一部分供参考：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    UIApplication.sharedApplication().setMinimumBackgroundFetchInterval(
        UIApplicationBackgroundFetchIntervalMinimum)

    return true
}

func application(application: UIApplication, completionHandler: (UIBackgroundFetchResult) -> Void) {

    if let AddressViewController = window?.rootViewController as? AddressViewController {
        AddressViewController.fetchAndUpdate() {
            completionHandler(.NewData)
        }
    } else {
        completionHandler(.Failed)
    }
}

func fetchAndUpdate(completionHandler: (() -> Void)!) {

    AddressList.map({ (oneLineAddress) in
        dataController.fetchTags(oneLineAddress) { (error, newPocket) in
            self.dataController.updateData(oneLineAddress, newPocket: newPocket)
        }
    })
}

func fetchTags(address:OneLineAddress, completionHandler: (NSError?, newPocket:Set<String>) -> Void) {

    var newPocket:Set<String> = []

    guard let targetAddress:OneLineAddress = address else {
        return
    }
    Alamofire.request(.GET, targetAddress.url).responseString {
        responseString in
            guard responseString.result.error == nil else {
                completionHandler(responseString.result.error!, newPocket: [])
                NSLog("%@", responseString.result.error!)
                return
            }
            guard let htmlAsString = responseString.result.value else {
                let error = Error.errorWithCode(.StringSerializationFailed, failureReason: "Could not get HTML as String")
                NSLog("%@", error)
                completionHandler(error, newPocket: [])
                return
            }

            let doc = HTMLDocument(string: htmlAsString)

            let anchors = doc.nodesMatchingSelector("a")

            for row in anchors {
                if let anchorElement = row as? HTMLElement {
                    if self.isAnchor(anchorElement) {
                        if  let title = self.matchKeyword(anchorElement, address: targetAddress) {
                            newPocket.insert(title)
                        }
                    }
                }
            }
            completionHandler(nil, newPocket: newPocket)
    }
}

Answer 1

swift的请求和响应。您可以使用AFNetwork或自己制作。

NSURLConnection，班级可以帮助你

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