Xcode 二进制运算符！=无法应用于NSUrlConnection！类型的操作数！。类型与Nilliteral可转换

我是Swift的新手，我终于完成了我的第一个应用程序，但当更新发布时，我的代码完全搞糟了。。我的代码中的大多数错误是由调用中的

sendSynchronousRequest

giving

额外参数“error”引起的。我试图改变它，最后想出了这个

    var url = NSURL(string: "http://****")
    var request = NSMutableURLRequest(URL: url!, cachePolicy: NSURLRequestCachePolicy.ReturnCacheDataElseLoad, timeoutInterval: Double.infinity);
    if IJReachability.isConnectedToNetwork(){
        request = NSMutableURLRequest(URL: url!, cachePolicy: NSURLRequestCachePolicy.UseProtocolCachePolicy, timeoutInterval: Double.infinity);
    }
    var response: NSURLResponse?
    let data = NSURLConnection!.self
    do {
        let data = try NSURLConnection.sendSynchronousRequest(request, returningResponse: &response)
    } catch (let e) {
        print(e)
    }
    if data != nil {
        var dataArray = JSON(data: data)
        let dutch_sentence = dataArray[id]["dutch_sentence"]
        let polish_sentence = dataArray[id]["polish_sentence"]
        let navigationTitle = dutch_sentence.string!.uppercaseString
        self.title = navigationTitle

        //Populate labels
        dutchSentenceLabel.text = dutch_sentence.string!
        polishSentenceLabel.text = polish_sentence.string!

    }

但现在它说：

Binary operator != cannot be applied to operands of type NSUrlConnection!.Type and NilLiteralConvertible

对于行
if数据！=nil{
考虑使用NSURLSessionTask而不是在iOS9中不推荐使用的
NSUrlConnection
，例如：

var url = NSURL(string: "http://****")
var request = NSMutableURLRequest(URL: url!, cachePolicy: NSURLRequestCachePolicy.ReturnCacheDataElseLoad, timeoutInterval: Double.infinity);
    if IJReachability.isConnectedToNetwork(){
        request = NSMutableURLRequest(URL: url!, cachePolicy: NSURLRequestCachePolicy.UseProtocolCachePolicy, timeoutInterval: Double.infinity);
    }
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config)

let task : NSURLSessionDataTask = session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
    if data != nil {
        var dataArray = JSON(data: data)
        let dutch_sentence = dataArray[id]["dutch_sentence"]
        let polish_sentence = dataArray[id]["polish_sentence"]
        let navigationTitle = dutch_sentence.string!.uppercaseString
        self.title = navigationTitle

        //Populate labels
        dutchSentenceLabel.text = dutch_sentence.string!
        polishSentenceLabel.text = polish_sentence.string!

    }
});

哦，谢谢你的工作，但是现在它在这一行给了我一个错误
var-dataArray=JSON（data:data）
说
不能用类型为（data:NSUrlConnection？）的参数列表调用类型为“JSON”的初始化器
我已经编辑了我的答案，
sendSynchronousRequest
方法在iOS9中被弃用。你应该使用
NSURLSessionDataTask
。还要检查你的JSON类构造函数。我在使用
NSURLSessionDataTask
的地方问了一个新问题，但你能检查一下我的方法是否正确吗？