无法使用类型为(data: NSUrlConnection?)的参数列表调用类型'JSON‘的初始值设定项

Question

我得到了这个错误：

Cannot invoke initialiser for type 'JSON' with an argument list of type (data: NSUrlConnection?)

当我尝试执行这段代码时：

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?
do {
    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!

}

我是Swift的新手，我正在尝试修复我的代码中的错误，因为它已经更新了，但我在这方面遇到了困难，因为我没有使用该语言的经验。有谁能帮帮我吗？如果我已经把整个代码搞乱了，我也不会感到惊讶..

我还尝试了这个：

    let 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 task = NSURLSession.sharedSession().dataTaskWithRequest(request) { (data, response, error) -> Void in
        var dataArray = JSON(data: data!)
        let dutch_sentence = dataArray[self.id]["dutch_sentence"]
        let polish_sentence = dataArray[self.id]["polish_sentence"]
        let navigationTitle = dutch_sentence.string!.uppercaseString
        self.title = navigationTitle

        //Populate labels
        self.dutchSentenceLabel.text = dutch_sentence.string!
        self.polishSentenceLabel.text = polish_sentence.string!
    }
    task.resume()

它没有错误，但我不知道它是否是正确的方式，以及它是否可以工作。我必须在很多地方替换它，所以在我这样做之前，我想确定它是否有效。

Answer 1

我相信你打算用JSONObjectWithData:options:error

除非您是使用SwiftyJSON执行此操作。如果是这样的话，这里有一个详细介绍如何安装和使用它的excellent article。