更新到Swift 2.0后,NSURLConnection抛出

在 Swift 2.0 Update之前,这段代码可以很好地从服务器上用 PHP脚本下载我的JSON文件：

let url = NSURL(string: webAdress)
let cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringLocalAndRemoteCacheData
var request = NSMutableURLRequest(URL: url!, cachePolicy: cachePolicy, timeoutInterval: 5.0)

var response: NSURLResponse? = nil
var error: NSError? = nil
let reply = NSURLConnection.sendSynchronousRequest(request, returningResponse:&response, error:&error)

更新后Xcode要求我做一些更改.我做了,代码没有错误,但它总是抛出……

let url = NSURL(string: webAdress)
    let cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringLocalAndRemoteCacheData
    let request = NSMutableURLRequest(URL: url!, cachePolicy: cachePolicy, timeoutInterval: 5.0)

    var response: NSURLResponse? = nil
    var reply = NSData()
    do {
    reply = try NSURLConnection.sendSynchronousRequest(request, returningResponse:&response)
    } catch {
        print("ERROR")
    }

期待您的解决方案！

这是使用新NSURLSession的示例 – 显然NSURLConnection已在iOS 9中弃用.

let url = NSURL(string: webAddress)
let request = NSURLRequest(URL: url!, cachePolicy: .ReloadIgnoringLocalAndRemoteCacheData, timeoutInterval: 5.0)

let session = NSURLSession.sharedSession()

session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
    print(data)
    print(response)
    print(error)
})?.resume()

我认为它非常干净,没有太多关于它的文档.如果您在使用此功能时遇到任何问题,请与我们联系.