session.dataTaskWithURL completeHandler从未调用

该任务永远不会完成，因为它永远不会开始。您必须使用其

resume()

let urlPath = apiURL + apiVersion + url + "?api_key=" + apiKeylet url = NSURL(string: urlPath)!let session = NSURLSession.sharedSession()let task = session.dataTaskWithURL(url) { data, response, error in    print("Task completed")    // rest of the function...}task.resume()