xcode Swift 2.0 NSURLConnection 发送同步请求
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Swift 2.0 NSURLConnection sendSynchronousRequest
提问by Tom Coomer
I am using the code below to check for an internet connection. It was working correctly but after the Swift 2.0 update I now see an error on the line var data = NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: nil) as NSData?saying extra argument 'error' in call.
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 更新之后，我现在在行上看到一个错误，var data = NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: nil) as NSData?说在调用中有额外的参数“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
}
Do you have any ideas what I should change it to? Thanks
你有什么想法我应该把它改成什么吗？谢谢
回答by Aseider
If you look at apples documentation (https://developer.apple.com/library/ios/documentation/Cocoa/Reference/Foundation/Classes/NSURLConnection_Class/#//apple_ref/occ/clm/NSURLConnection/sendSynchronousRequest:returningResponse:error:) you'll see that the definition changed to this:
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： ) 你会看到定义变成了这样：
class func sendSynchronousRequest(_ request: NSURLRequest,
returningResponse response: AutoreleasingUnsafeMutablePointer<NSURLResponse?>) throws -> NSData
They have removed the error parameter and the method throws now an ErrorType, if the request fails. So this should work:
他们已经删除了错误参数ErrorType，如果请求失败，该方法现在会抛出 an 。所以这应该有效：
do {
let data = try NSURLConnection.sendSynchronousRequest(request, returningResponse: &response)
} catch (let e) {
print(e)
}
However you shouldn't use this method: It's deprecated in favor of NSURLSessionsince iOS 9 and OS X 10.11.
但是，您不应使用此方法：NSURLSession自 iOS 9 和 OS X 10.11 起，它已被弃用。
