Swift 2.0 NSURLConnection sendSynchronousRequest

Question

我正在使用下面的代码来检查互联网连接。它工作正常，但在 Swift 2.0 更新后，我现在在 var data = NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: nil) as NSData? 行看到一个错误，在调用中说额外的参数“错误”。

class func isConnectedToNetwork()->Bool{

    var Status:Bool = false
    let url = NSURL(string: "http://google.com/")
    let request = NSMutableURLRequest(URL: url!)
    request.HTTPMethod = "HEAD"
    request.cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringLocalAndRemoteCacheData
    request.timeoutInterval = 10.0

    var response: NSURLResponse?

    var data = NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: nil) as NSData?

    if let httpResponse = response as? NSHTTPURLResponse {
        if httpResponse.statusCode == 200 {
            Status = true
        }
    }

    return Status
}

你有什么想法我应该把它改成什么吗？ 谢谢

Answer 1

如果您查看苹果文档 (https://developer.apple.com/library/ios/documentation/Cocoa/Reference/Foundation/Classes/NSURLConnection_Class/#//apple_ref/occ/clm/NSURLConnection/sendSynchronousRequest:returningResponse:error:)，您会发现定义更改为：

class func sendSynchronousRequest(_ request: NSURLRequest,
            returningResponse response: AutoreleasingUnsafeMutablePointer<NSURLResponse?>) throws -> NSData

如果请求失败，他们已经删除了错误参数，并且该方法现在会抛出 ErrorType。所以这应该有效：

do {
    let data = try NSURLConnection.sendSynchronousRequest(request, returningResponse: &response)
} catch (let e) {
    print(e)
}

但是，您不应该使用此方法：自 iOS 9 和 OS X 10.11 起，它已被 NSURLSession 弃用。