将sqlite3_exec回调函数的结果保存到Swift中的字典中

var resultDict = [String: Any]()

func callback(userData: UnsafeMutableRawPointer?, columnCount: Int32, values: UnsafeMutablePointer<UnsafeMutablePointer<Int8>?>?, columnNames: UnsafeMutablePointer<UnsafeMutablePointer<Int8>?>?) -> Int32 {
    guard let columnNames = columnNames, let values = values else {
        return 0
    }
    
    for i in 0..<Int(columnCount) {
        let columnName = String(cString: columnNames[i]!)
        let value = String(cString: values[i]!)
        resultDict[columnName] = value
    }
    
    return 0
}

let sql = "SELECT * FROM table"
let callbackPointer = unsafeBitCast(callback, to: UnsafeMutableRawPointer.self)
let result = sqlite3_exec(database, sql, callbackPointer, nil, nil)

print(resultDict)