在 Xcode 9 中运行我的代码后,我得到一个 Thread1: EXC_BAD_INSTRUCTION (code=EXC_1386_INVOP,subcode=0x0)。该代码在 Xcode 8 中运行良好。
class func loadDataFromURL(_ url: URL, completion:@escaping (_ data: Data?, _ error: NSError?) -> Void) {
let session = URLSession.shared
// Use NSURLSession to get data from an NSURL
let loadDataTask = session.dataTask(with: url, completionHandler: { (data: Data?, response: URLResponse?, error: NSError?) -> Void in
if let responseError = error {
completion(nil, responseError)
} else if let httpResponse = response as? HTTPURLResponse {
if httpResponse.statusCode != 200 {
let statusError = NSError(domain:"Domain", code:httpResponse.statusCode, userInfo:[NSLocalizedDescriptionKey : "HTTP status code has unexpected value."])
completion(nil, statusError)
} else {
completion(data, nil)
}
}
} as! (Data?, URLResponse?, Error?) -> Void) //Thread1: EXC_BAD_INSTRUCTION (code=EXC_1386_INVOP,subcode=0x0)
loadDataTask.resume()
}
我正在尝试从 url 加载数据,我不知道为什么会收到此错误。谢谢你。