解析无效的JSON Swift 4 [英] parsing invalid JSON Swift 4

问题描述

我的Json看起来像这样:

My Json looks like this:

data = { "key":"value",
         "key":"value",
         "key":"value"}

我一直在尝试使用Swift4 Codable协议来解析JSON，并已使用它产生了很大的效果，但是对于我来说，我无法破坏这种结构.外部data =使它成为无效的JSON，但在尝试将其传递给JSONDecoder之前，我似乎找不到任何修改数据的方法.

I've been trying to use Swift4 Codable protocols for parsing JSON and have used it to great effect but for the life of me I cannot break this structure. The outer data = makes it invalid JSON but I can't seem to find any way to modify the data before I attempt to pass it to the JSONDecoder.

有什么办法可以将数据作为字符串接收，以便删除最外面的字符并仅解析剩余的JSON对象?

Is there any way I can just receive that data as a string so I can drop the outermost characters and just parse the remaining JSON object?

推荐答案

如果JSON序列化失败，并且您想更正格式错误的数据(并且无法修复API响应)，则可以将数据转换为字符串，修改字符串以创建有效的JSON，然后转换回数据并将其解码为模型对象.对于上述情况:

If JSON serialization is failing and you want to correct the malformed data (and fixing the API response isn't an option) you can convert the data to a string, modify the string to create valid JSON, then convert back to data and decode that into your model object. For the case above:

func normalizeJSON(data: Data) -> Data? {
    guard let stringRepresentation = String(data: data, encoding: .utf8) else { return nil }

    let validJSONString = stringRepresentation.dropFirst(6)

    return validJSONString.data(using: .utf8)
}

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