Xcode Swift 3 NSURLSession.sharedSession(Xcode Swift 3 NSURLSession.sharedSession)

Xcode Swift 3 NSURLSession.sharedSession(Xcode Swift 3 NSURLSession.sharedSession)

我试图用swift 2更新我的基本天气应用程序到swift 3这是我的代码：

func getWeather(city: String) { let path = "http://api.openweathermap.org/data/2.5/weather?q=London,uk&appid=095711373620570aa92ee530246dc8af" let url = NSURL(string: path) let session = NSURLSession.sharedSession() let task = session.dataTaskWithURL(url!) { (data: NSData?, response: NSURLResponse?, error: NSError?) -> Void in print(">>>> \(data)") }

和NSURLSession.sharedSession（第5行）和NSURLResponse（第6行）打印出错误

Im trying to update my basic weather app i made with swift 2 to swift 3 this is my code:

func getWeather(city: String) { let path = "http://api.openweathermap.org/data/2.5/weather?q=London,uk&appid=095711373620570aa92ee530246dc8af" let url = NSURL(string: path) let session = NSURLSession.sharedSession() let task = session.dataTaskWithURL(url!) { (data: NSData?, response: NSURLResponse?, error: NSError?) -> Void in print(">>>> \(data)") }

and NSURLSession.sharedSession(5th line) and NSURLResponse(6th line) print out an error

最满意答案

不要在完成处理程序签名中注释类型并使用Swift 3本机结构：

func getWeather(city: String) { let path = "http://api.openweathermap.org/data/2.5/weather?q=London,uk&appid=095711373620570aa92ee530246dc8af" let url = URL(string: path) let session = URLSession.shared let task = session.dataTask(with:url!) { (data, response, error) -> Void in print(">>>> \(data)") }

Don't annotate types in the completion handler signature and use the Swift 3 native structures:

func getWeather(city: String) { let path = "http://api.openweathermap.org/data/2.5/weather?q=London,uk&appid=095711373620570aa92ee530246dc8af" let url = URL(string: path) let session = URLSession.shared let task = session.dataTask(with:url!) { (data, response, error) -> Void in print(">>>> \(data)") }