英文:
How to change error.localizedDescription to JSON by Swift?
问题
在Swift中，我从云函数中收到了错误。我像这样捕获了错误：
functions.httpsCallable("addMessage").call(["text": inputField.text]) { result, error in
if let error = error as NSError? {
if error.domain == FunctionsErrorDomain {
let code = FunctionsErrorCode(rawValue: error.code)
let message = error.localizedDescription
let details = error.userInfo[FunctionsErrorDetailsKey]
}
}
}
消息以JSON格式从云函数获取，如下所示：
{"message":"text is required","status":"INVALID_ARGUMENT"}
如果我从云函数收到错误消息，而我想要将其显示给用户。首先，我尝试了以下代码：
let status = message["status"]
但在Xcode中我收到了 No exact matches in call to subscript 的错误消息。我该如何解决这个问题？
英文:
In Swift I got the error from Cloud Functions.
And I caught the error like this
functions.httpsCallable("addMessage").call(["text": inputField.text]) { result, error in
if let error = error as NSError? {
if error.domain == FunctionsErrorDomain {
let code = FunctionsErrorCode(rawValue: error.code)
let message = error.localizedDescription
let details = error.userInfo[FunctionsErrorDetailsKey]
}
}
}
The message get like JSON format from Cloud functions.
{"message":"text is required","status":"INVALID_ARGUMENT"}
If I got the error message from Cloud functions, and I want to display to the user.
First I tried
let status = message["status"]
But I got No exact matches in call to subscript in xcode.
How do I resolve this problem?
答案1
得分: 2
error.localizedDescription 显然是一个 JSON 字符串，你需要对其进行反序列化。
let messageJSON = error.localizedDescription
let messageDictionary = try? JSONDecoder().decode([String: String].self, from: Data(messageJSON.utf8))
let message = messageDictionary?["message"] ?? ""
英文:
error.localizedDescription is obviously a JSON string, you have to deserialize it
let messageJSON = error.localizedDescription
let messageDictionary = try? JSONDecoder().decode([String:String].self, from: Data(messageJSON.utf8))
let message = messageDictionary?["message"] ?? ""
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