Swift Firebase无法在字典中存储值

import Foundation

func convertDictionaryToJsonString(dictionary: [String: Any]) -> String? {
    do {
        let jsonData = try JSONSerialization.data(withJSONObject: dictionary, options: [])
        let jsonString = String(data: jsonData, encoding: .utf8)
        return jsonString
    } catch {
        print("Error converting dictionary to JSON string: \(error.localizedDescription)")
        return nil
    }
}

let dictionary: [String: Any] = ["key1": "value1", "key2": "value2"]
if let jsonString = convertDictionaryToJsonString(dictionary: dictionary) {
    // 将jsonString存储在Firebase中
    // 例如：Firebase.database().reference().child("data").setValue(jsonString)
} else {
    print("Failed to convert dictionary to JSON string")
}

// 从Firebase中获取jsonString
// 例如：Firebase.database().reference().child("data").observeSingleEvent(of: .value) { snapshot in
//     if let jsonString = snapshot.value as? String {
//         let dictionary = convertJsonStringToDictionary(jsonString: jsonString)
//         // 使用字典数据
//     }
// }

func convertJsonStringToDictionary(jsonString: String) -> [String: Any]? {
    if let jsonData = jsonString.data(using: .utf8) {
        do {
            let dictionary = try JSONSerialization.jsonObject(with: jsonData, options: []) as? [String: Any]
            return dictionary
        } catch {
            print("Error converting JSON string to dictionary: \(error.localizedDescription)")
            return nil
        }
    }
    return nil
}