Question

我有一个从响应中获取的JSON数据。我想将数据显示在警报视图中。

1。这是我的消息：

"error": {
        "email": [
            "The email has already been taken."
        ],
        "phone": [
            "The phone has already been taken."
        ]
    }

我的Swift代码：

let errormessage = jsonObj.value(forkey: "error")
createAlert(title: "Try again" , message: errormessage as! String)

请帮助我如何在警报中显示错误消息，这将非常有帮助

Answer 1

请勿快速使用NSDictionary。使用[String:Any]。获取字典的所有值并加入字符串数组。并以新行作为分隔符将错误加入。

let jsonObj:[String: Any] = ["error": [
                "email": ["The email has already been taken."],
                "phone": ["The phone has already been taken."]]
                ]
if let errorMsgs = jsonObj["error"] as? [String: [String]] {
    let errMsg = errorMsgs.values.map { $0.reduce("", +) }.joined(separator: "\n")
    print(errMsg)
    createAlert(title: "Try again" , message: errMsg)
}

Answer 2

您可以这样解析json：

func jsonSerializer() {
    let jsonString = """
{
    "error": {
        "email": [
        "The email has already been taken."
        ],
        "phone": [
        "The phone has already been taken."
        ]
    }
}
"""
    let data = Data(jsonString.utf8)

    do {
        if let json = try JSONSerialization.jsonObject(with: data) as? [String: Any] {
            if let error = json["error"] as? [String: Any] {
                if let email = error["email"] as? [String],  email.count > 0 {
                    print(email[0])
//                    createAlert(title: "Try again", message: email[0])
                }
                if let phone = error["phone"] as? [String],  phone.count > 0 {
                    print(phone[0])
//                    createAlert(title: "Try again", message: phone[0])
                }
            }
        }
    } catch let parseError {
        print("parsing error: \(parseError)")
        let responseString = String(data: data, encoding: .utf8)
        print("raw response: \(responseString!)")
    }
}

带有JSON数据的警报视图

2 个答案: