相关疑难解决方法(0)

我已经将我的代码更新为Xcode 8.0 beta 6,但我似乎陷入了关于新的非转义关闭默认值的问题.在下面的代码中,Xcode建议在下面代码的第一行@escaping前面添加completion:,但是仍然不会编译并进入圆圈.*

(编辑:事实上,@scaping应该在之后 添加completion:,正如Xcode建议的那样.警报可能仍然显示,但清理和编译将删除它.)*如何重新编写/修复此代码以在更新的Swift 3中工作？我看过新手册,但找不到合适的代码示例.

func doSomething(withParameter parameter: Int, completion: () -> ()) {
    // Does something

    callSomeOtherFunc(withCompletion: completion)
  }

// Calling the method and execute closure 
doSomething(withParameter: 2) {
  // do things in closure
}

任何帮助非常感谢!

我可以通过NSURLSessionSwift 以某种方式执行同步HTTP请求吗？

我可以通过以下代码执行异步请求:

if let url = NSURL(string: "https://2ch.hk/b/threads.json") {
            let task = NSURLSession.sharedSession().dataTaskWithURL(url) {
                (data, response, error) in

                var jsonError: NSError?
                let jsonDict = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: &jsonError) as [String: AnyObject]
                if jsonError != nil {
                    return
                }

                // ...
            }
            task.resume()
        }

但同步请求怎么样？

提前致谢.

class PostFOrData {
    let url = NSURL( string: "http://210.61.209.194:8088/SmarttvWebServiceTopmsoApi/GetReadlist")
    var picUrl = NSURL(string : "http://210.61.209.194:8088/SmarttvMedia/img/epi00001.png")
    var responseString : NSString = ""

    func forData() -> NSString {

        let request = NSMutableURLRequest( URL: url!)
        request.HTTPMethod = "POST"
        var s : NSString = ""

        let postString : String = "uid=59"
        request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)

        let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
            data, response, error in

            if error != nil {
                println("error=\(error)")
                return
            } else {
                println("response = \(response!)")
                self.responseString = NSString(data: data, encoding: NSUTF8StringEncoding)!
                println("responseString = …

我有以下代码:

func completeLoadAction(urlString:String) -> Int {
    let url = URL(string:urlString.trimmingCharacters(in: .whitespaces))
    let request = URLRequest(url: url!)
    let task = URLSession.shared.dataTask(with: request) { data, response, error in
        guard let data = data, error == nil else {                                                 // check for fundamental networking error
            print("error=\(error)")
            let ac = UIAlertController(title: "Unable to complete", message: "The load has been added to the completion queue. This will be processed once there is a connection.", preferredStyle: .alert)
            ac.addAction(UIAlertAction(title: "OK", style: .default))
            self.present(ac, animated:  true)
            return
        } …