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NSURLSession验证

nsurlsession swift

Leo · 技术社区 · 9 年前

我正在尝试使用Swift2找到正确(或至少是一种好的)处理数据请求的方法。

我想实现的是:

检查数据连接是否可用,如果不可用,则通知用户
如果连接可用,请提出请求
检查请求响应,如果无效,则通知用户
如果有效,请检查响应代码并显示2条消息之一

到目前为止我有什么

    let requestURL: String = **********************
    let url = NSURL(string: requestURL)!
    let request = NSMutableURLRequest(URL: url)
    let session = NSURLSession.sharedSession()

    let postParams: NSDictionary = ["id":newId!]

    request.HTTPMethod = "POST"

    do {
        let jsonData = try NSJSONSerialization.dataWithJSONObject(postParams, options: [])
        let jsonString = NSString(data: jsonData, encoding: NSUTF8StringEncoding)! as String
        let utf8str = jsonString.dataUsingEncoding(NSUTF8StringEncoding)
        let base64Encoded = utf8str?.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))
        let bodyData = "data="+base64Encoded!

        request.HTTPBody = bodyData.dataUsingEncoding(NSUTF8StringEncoding)
    } catch {
        print("Error serialising JSON")
    }

    session.dataTaskWithRequest(request) { data, response, error in

        // Make sure response is OK
        guard let realResponse = response as? NSHTTPURLResponse where realResponse.statusCode == 200 else
        {
            // Show success message
            print("Invalid Response from server")
        }

        // Read JSON Data
        if let postString = NSString(data:data!, encoding: NSUTF8StringEncoding) as? String {
            if let responseData = postString.dataUsingEncoding(NSUTF8StringEncoding) {
                let json = JSON(data: responseData)
                let responseMessage:String = json["response"]["data"].stringValue
                if(responseMessage == "success")
                {
                   print("successful post")
                }else{
                   print("error saving post")
                }

            }
        }
    }

目前,如果我在飞机模式下运行这个,那么什么都不会发生,但我想抓住这个,告诉他们他们需要一个数据连接

1 回复 | 直到 9 年前

Godlike 9 年前

试试这样的东西:

func connectedToNetwork() -> Bool {
            var zeroAddress = sockaddr_in()
            zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
            zeroAddress.sin_family = sa_family_t(AF_INET)
            let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
                SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
            }
            var flags = SCNetworkReachabilityFlags()
            if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
                return false
            }
            let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
            let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
            return (isReachable && !needsConnection)
            }

if(connectedToNetwork() == true){
//call your function to make the request
} else {
//show alert that they need an internet connection
}