Swift to Swift 3代码转换:读取JSON文件

Question

我有这个代码用于读取我正在尝试进入Swift 3环境的JSON文件.这里是:

do {
    let dictionary = try NSJSONSerialization.JSONObjectWithData(dataOK, options: NSJSONReadingOptions()) as AnyObject!
        dictionaryOK = (dictionary as! NSDictionary as? Dictionary <String, AnyObject>)!
  }
catch {
    print("Level file '\(filename)' is not valid JSON: \(error)")
    return nil
}

Xcode提供了修复一些错误的建议(因为一些对象和类已被重命名),这产生了这样的结果:

do {
    //Problem here: parameters don't match overrides
    let dictionary = try JSONSerialization.jsonObject(dataOK as Data, options: JSONSerialization.ReadingOptions()) as AnyObject!
    dictionaryOK = (dictionary as! NSDictionary as? Dictionary <String, AnyObject>)!
}
catch {
    print("Level file '\(filename)' is not valid JSON: \(error)")
    return nil
}

哪个不匹配任何jsonObjects覆盖(它说).我检查了文档,其中说jsonObjects的参数应该是:

class func jsonObject(with data: Data, 
           options opt: JSONSerialization.ReadingOptions = []) throws -> AnyObject

我究竟做错了什么？

Answer 1

你的Swift 2代码非常详细.

试试这个:

do {
    if let dictionaryOK = try JSONSerialization.jsonObject(with: dataOK, options: []) as? [String: AnyObject] {
        // parse JSON
    }
} catch {
    print(error)
}