Question

我创建了一个watchOS应用程序，它从API请求值并在标签上显示。它在模拟器中工作得很好，但是当我在Apple Watch上执行它时会崩溃并出现以下错误：

[ERROR] There is an unspecified error with the connection
fatal error: unexpectedly found nil while unwrapping an Optional value

第一个错误是由我的代码生成的。

我写的代码是：

func price_request() -> NSData? {

    guard let url = NSURL(string: "https://api.xxxxx.com/xxx.php") else {
        return nil
    }

    guard let data = NSData(contentsOfURL: url) else {
        print("[ERROR] There is an unspecified error with the connection")
        return nil
    }

    print("[CONNECTION] OK, data correctly downloaded")
    return data
}

func json_parseData(data: NSData) -> NSDictionary? {
    do {
        let json: AnyObject = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers) as! Dictionary<String, AnyObject>
        print("[JSON] OK!")

        return (json as? NSDictionary)

    } catch _ {
        print("[ERROR] An error has happened with parsing of json data")
        return nil
    }
}

我还尝试添加App Transport Security旁路（如果由于对HTTPS URL的请求而不需要它，但它不起作用。）

你能帮帮我吗？

谢谢

Answer 1

尝试使用NSURLSession获取数据......

//declare data task
var task: NSURLSessionDataTask?

//setup the session
let url = NSURL(string:"https://url.here")!
let conf = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: conf)

task = session.dataTaskWithURL(url) { (data, res, error) -> Void in
        if let e = error {
            print("dataTaskWithURL fail: \(e.debugDescription)")
            return
        }
        if let d = data {
                 //do whatever
            })
        }
    }
    task!.resume()

Swift HTTP请求在模拟器上运行，但在真实设备中不起作用

1 个答案: