Question

对于POST请求，我使用以下代码：

private func post(url: String, params: [String: AnyObject], headers: [String: AnyObject]) {

   let url = NSURL(string: apiUrl)!
   let session = NSURLSession.sharedSession()
   let request = NSMutableURLRequest(URL: url)
   request.HTTPMethod = "POST"
   request.setValue("application/json; charset=utf-8", forHTTPHeaderField:  "Content-Type")
   request.addValue("application/json", forHTTPHeaderField: "Application")

   do {
      request.HTTPBody = try NSJSONSerialization.dataWithJSONObject(params, options: NSJSONWritingOptions())
   } catch {            
      print("error")

      //POST with completionHandler
      var task = session.dataTaskWithRequest(url, completionHandler: { (data, response, error) -> Void in        
        print(data)           
      })        
   }
}

并且在var task = ...最开始的行中出现此错误：Cannot convert value of type 'NSURL' to expected argument type 'NSURLRequest'

Answer 1

更改此行：

var task = session.dataTaskWithRequest(url, completionHandler: { (data, response, error) -> Void in

并传递请求...而不是网址：

var task = session.dataTaskWithRequest(request, completionHandler: { (data, response, error) -> Void in

总是读取你正在调用的方法名称，这是专门创建一个dataTask和REQUEST，xcode也应该突出显示。

NSURLSession Documentation

无法转换类型的值＆＃39; NSURL＆＃39;预期参数类型＆＃39; NSURLRequest＆＃39;

1 个答案: