服务器不可用时如何快速处理错误? [英] How to handle error in swift when server is not available?

问题描述

当服务器不可用或已关闭时，如何处理此服务器调用的错误?

How to handle error for this server call when the server is not available or is down?

func createData(request:Crudpb_CreateRequest, with completion: @escaping (String) -> Void) throws {
    DispatchQueue.main.async {
        self.response = try! self.client.create(request) // <---- How to handle error for this server call when the server is not available or is down?
        completion(self.response.result)
    }
}

它返回一个对象，所以当我将结果存储在响应变量中然后说出print(response.result)时，它将打印响应字符串

It returns an object, so when I store the result in response variable then say print(response.result) it prints the response string

请帮助.

推荐答案

我无法理解您要确切执行的操作，也不知道您的整个代码.

I can't undertand what you are trying to do exactly, don’t know your entire code.

self.client是什么类的对象?什么self.client.create方法返回? URLResponse?

self.client is an object of what Class? What self.client.create method returns? URLResponse?

无论如何，您可以尝试:

Anyway, you can try:

if let response = self.response as? HTTPURLResponse{
    if response.statusCode == 503{
        //server not available
    }
}

您的self.client.create方法之后.

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