当互联网连接处于活动状态时，该应用效果很好。但是，我尝试关闭互联网连接，我尝试使用终点。
我收到了这个错误：
***由于未捕获的异常终止应用程序＆＃39; NSInternalInconsistencyException＆＃39;，原因：＆＃39; - [UIKeyboardTaskQueue waitUntilAllTasksAreFinished]只能从主线程调用。＆＃39;
几点：
a）首先，我不清楚我应该使用异步的哪个地方 - 我在switch语句中将它放在两个不同的情况下。
b）其次，我是否使用error.localizedDescription处理错误？我想要做的是找到一种方法来处理互联网关闭时的1009错误。
如果我要求不必要的长答案，请引导我查看我可以阅读的资源。
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
if let error = error{
self.errorMessage += "Data Gathering Error: " + error.localizedDescription + "\n"
completion(self.errorMessage, nil)
return
} else if let data = data, let response = response as? HTTPURLResponse{
print(response.statusCode)
if response.statusCode == 200 {
do {
switch relativeURL{
case .requestOTP:
print("------------")
print(String(data: data, encoding: .utf8)!)
print("------------")
let responseInfo = try JSONDecoder().decode(loginResponse.self, from: data)
print(responseInfo.success)
print(responseInfo.message)
DispatchQueue.main.async {
let dataReceived = responseData(loginResponse: .init(success: responseInfo.success, error: .init(message:responseInfo.error?.message), message: responseInfo.message), decodeOTPResponse: nil,quotaResponse:nil,UserAddResponse:nil)
print(dataReceived)
completion(nil,dataReceived)
}
case .loginWithOTP:
let responseInfo = try JSONDecoder().decode(decodeOTPResponse.self, from: data)
let dataReceived = responseData(loginResponse: nil, decodeOTPResponse: .init(success: responseInfo.success, token: responseInfo.token, error: .init(message:responseInfo.error?.message), totp_secret: responseInfo.totp_secret),quotaResponse:nil,UserAddResponse:nil)
print(dataReceived)
DispatchQueue.main.async {
completion(nil,dataReceived)
}
case .addUser:
let responseInfo = try JSONDecoder().decode(UserAddResponse.self, from: data)
print(responseInfo)
let dataReceived = responseData(loginResponse: nil, decodeOTPResponse: nil, quotaResponse: nil, UserAddResponse:.init(success: responseInfo.success, error:.init(message:responseInfo.error?.message), message: responseInfo.message))
DispatchQueue.main.async {
completion(nil,dataReceived)
}
default:
completion("Wrong request call",nil)
return
}
} catch let jsError{
print("Error serialising JSON", jsError)
completion("Error Serialising JSON",nil)
return
}
} else if response.statusCode > 401 && response.statusCode < 500{
print("Unauthorized to perform action")
} else if response.statusCode == 500{
print("endpoint not found")
}
}
}
task.resume()
答案 0 :(得分：2)
尝试覆盖主队列中的所有completion（）（不确定这会起作用，但试试这个。）
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
if let error = error{
self.errorMessage += "Data Gathering Error: " + error.localizedDescription + "\n"
DispatchQueue.main.async {
completion(self.errorMessage, nil)
}
return
} else if let data = data, let response = response as? HTTPURLResponse{
print(response.statusCode)
if response.statusCode == 200 {
do {
switch relativeURL{
case .requestOTP:
print("------------")
print(String(data: data, encoding: .utf8)!)
print("------------")
let responseInfo = try JSONDecoder().decode(loginResponse.self, from: data)
print(responseInfo.success)
print(responseInfo.message)
DispatchQueue.main.async {
let dataReceived = responseData(loginResponse: .init(success: responseInfo.success, error: .init(message:responseInfo.error?.message), message: responseInfo.message), decodeOTPResponse: nil,quotaResponse:nil,UserAddResponse:nil)
print(dataReceived)
completion(nil,dataReceived)
}
case .loginWithOTP:
let responseInfo = try JSONDecoder().decode(decodeOTPResponse.self, from: data)
let dataReceived = responseData(loginResponse: nil, decodeOTPResponse: .init(success: responseInfo.success, token: responseInfo.token, error: .init(message:responseInfo.error?.message), totp_secret: responseInfo.totp_secret),quotaResponse:nil,UserAddResponse:nil)
print(dataReceived)
DispatchQueue.main.async {
completion(nil,dataReceived)
}
case .addUser:
let responseInfo = try JSONDecoder().decode(UserAddResponse.self, from: data)
print(responseInfo)
let dataReceived = responseData(loginResponse: nil, decodeOTPResponse: nil, quotaResponse: nil, UserAddResponse:.init(success: responseInfo.success, error:.init(message:responseInfo.error?.message), message: responseInfo.message))
DispatchQueue.main.async {
completion(nil,dataReceived)
}
default:
DispatchQueue.main.async {
completion("Wrong request call",nil)
}
return
}
} catch let jsError{
print("Error serialising JSON", jsError)
DispatchQueue.main.async {
completion("Error Serialising JSON",nil)
}
return
}
} else if response.statusCode > 401 && response.statusCode < 500{
print("Unauthorized to perform action")
} else if response.statusCode == 500{
print("endpoint not found")
}
}
}
task.resume()
答案 1 :(得分：0)
我也经历了两天的错误。直到我将代码放入
DispatchQueue.main.asyn
do {
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
if let parseJSON = json {
DispatchQueue.main.async {
let userId = parseJSON["firstName"] as? String
print("User id: \(String(describing: userId!))")
if (userId?.isEmpty)!
{
// Display an Alert dialog with a friendly error message
self.showAlert(title: "Request Error", message: "Could not successfully perform this request. Please try again later")
return
} else {
self.showAlert(title: "SignIn Successfully", message: "Successfully Registered a New Account. Please proceed to Sign in")
}
}
}
else {
//Display an Alert dialog with a friendly error message
// self.showAlert(title: "Request Error", message: "Could not successfully perform this request. Please try again later")
}
} catch {
// self.removeActivityIndicator(activityIndicator: myActivityIndicator)
// Display an Alert dialog with a friendly error message
self.showAlert(title: "Request Error", message: "Could not successfully perform this request. Please try again later")
print(error)
}
}
task.resume()
}