Question

我正在 Swift 4.2

中编写一个 iOS应用

服务器使用无效字符响应质量差的json。我必须替换一些字符以使其成为有效的json字符串，但我无法。

服务器响应字符串：

{\“ fieldsets \”：[{\“ properties \”：[{\“ alias \”：\“ categories \”，\“ value \”：\“ Equity \”}，{\“ alias \ “：\” subCategory \“，\” value \“：\” [\ r \ n \\“ Banking \\”，\ r \ n \\“ FMCG \\”，\ r \ n \\“ Infrastructure \ \“，\ r \ n \\”国际基金\\“，\ r \ n \\”大盘股“，\ r \ n \\”大中盘股“，\ r \ n \\ “ Mid Cap \\”，\ r \ n \\“ Balanced Fund \\”，\ r \ n \\“ Multi Cap \\”，\ r \ n \\“ Others \\”，\ r \ n \ \“ Pharma \\”，\ r \ n \\“税收计划\\”，\ r \ n \\“每日\”，\ r \ n \\“小帽子”，\ r \ n \ \“ Mid＆Small Cap \\”，\ r \ n \\“ Diversified \\” \ r \ n] \“}，{\” alias \“：\” icon \“，\” value \“：\ “ /media/1138/equity.png \”}“]，\”别名\“：\” categooriesSubCategories \“，\” disabled \“：false，\” id \“：\” 170e1ba0-6f05-4a11-a2a6- 04e108e7fa1f \“，\” releaseDate \“：null，\” expireDate \“：null，\” allowedMemberGroups \“：\” \“}，{\” properties \“：[{\” alias \“：\” categories \“，\” value \“：\”平衡\“}，{\”别名\“：\” subCategory \“，\” value \“：\” [\ r \ n \\“债务导向型激进型\ \“，\ r \ n \\”债务导向的保守派\\“，\ r \ n \\”信贷机会\\“，\ r \ n \\”权益导向的\\“，\ r \ n \\ “资产Alloc ation \\“，\ r \ n \\”其他\\“，\ r \ n \\”每年\\“，\ r \ n \\”高级\\“ \ r \ n] \”}，{ \“ alias \”：\“ icon \”，\“ value \”：\“ / media / 1139 / balanced.png \”}]，\“ alias \”：\“ categorysSubCategories \”，\“ disabled \” ：false，\“ id \”：\“ aabf640c-1ba4-4136-9dd0-79f3dfd6b79b \”，\“ releaseDate \”：null，\“ expireDate \”：null，\“ allowedMemberGroups \”：\\“ \”} ，{\“ properties \”：[{\“ alias \”：\“ categories \”，\“ value \”：\“ Tax Saver \”}，{\“ alias \”：\“ subCategory \”，\ “ value \”：\“ [\ r \ n \\” Any \\“ \ r \ n] \”}，{\“ alias \”：\“ icon \”，\“ value \”：\“ / media / 1140 / tax-saver.png \“}]，\” alias \“：\” categooriesSubCategories \“，\” disabled \“：false，\” id \“：\” fac9c316-16dc-48ab-bc0d- e8c22c02378f \“，\” releaseDate \“：null，\” expireDate \“：null，\” allowedMemberGroups \“：\” \“}，{\” properties \“：[{\” alias \“：\” categories \“，\” value \“：\”债务\“}，{\”别名\“：\” subCategory \“，\” value \“：\” [\ r \ n \\“液体\\”， \ r \ n \\“ FMP \\”，\ r \ n \\“ Gilt中长期债券”，\ r \ n \\“ Gilt短期债券\”，\ r \ n \\“收入\\“，\ r \ n \\”其他\\“，\ r \ n \\”短期\\“，\ r \ n \\”超短期\\“，\ r \ n \\”中上限\“，\ r \ n \\“小型股\\”，\ r \ n \\“浮标\\”，\ r \ n \\“金银基金\”，\ r \ n \\“动态债券\\” \ r \ n ] \“}，{\” alias \“：\” icon \“，\” value \“：\” / media / 1141 / debt.png \“}]，\” alias \“：\” categoriesSubCategories \“ ，\“ disabled \”：false，\“ id \”：\“ ef1efeda-3334-4a9b-bda7-afff76474a40 \”，\“ releaseDate \”：null，\“ expireDate \”：null，\“ allowedMemberGroups \” ：\“ \”}]}

我正在尝试使用：

     let convertedStr = jsonStr.replacingOccurrences(of: "\\r\\n", with: "", options: .literal, range: nil)
   let convertedStr2 = convertedStr.replacingOccurrences(of: "\\", with: "", options: .literal, range: nil)
  let convertedStr3 = convertedStr2.replacingOccurrences(of: "\"[", with: "", options: .literal, range: nil)
 let convertedStr4 = convertedStr3.replacingOccurrences(of: "]\"", with: "", options: .literal, range: nil)

没有解决问题。

Answer 1

您的convertedStr3和convertedStr4应该看起来像这样：

let convertedStr3 = convertedStr2.replacingOccurrences(of: "\"[", with: "[", options: .literal, range: nil)
let convertedStr4 = convertedStr3.replacingOccurrences(of: "]\"", with: "]", options: .literal, range: nil)

您的代码无法完全正常工作，因为您正在删除[和]之类的代表json中数组的字符。要解决此问题，请注意，我同时添加了两个with: "[",和with: "]",，这使得替换成为可能：

"[和[在convertStr3中
]"和]在convertStr4中

尝试print(convertedStr4)，您应该可以复制结果并jsonlint.com对其进行检查，以验证json的格式正确。

Answer 2

该问题是由于\r\n引起的，它应该是“ \ r \ n”或什么也不是，因为它们位于JSON（JSON中的JSON字符串化）之内。

所以这两个：

let convertedStr = jsonStr.replacingOccurrences(of: "\r\n", with: "")

或

let convertedStr = jsonStr.replacingOccurrences(of: "\r\n", with: "\\r\\n")

应该足够了。

无需其他修改。我建议将其修复在后端部分。

后端应向您发送此消息（有效）：

{\"fieldsets\":[{\"alias\":\"categoriesSubCategories\",\"allowedMemberGroups\":\"\",\"id\":\"170e1ba0-6f05-4a11-a2a6-04e108e7fa1f\",\"expireDate\":null,\"properties\":[{\"alias\":\"categories\",\"value\":\"Equity\"},{\"alias\":\"subCategory\",\"value\":\"[\\r\\n \\\"Banking\\\",\\r\\n \\\"FMCG\\\",\\r\\n \\\"Infrastructure\\\",\\r\\n \\\"International Funds\\\",\\r\\n \\\"Large Cap\\\",\\r\\n \\\"Large & Mid Cap\\\",\\r\\n \\\"Mid Cap\\\",\\r\\n \\\"Balanced Fund\\\",\\r\\n \\\"Multi Cap\\\",\\r\\n \\\"Others\\\",\\r\\n \\\"Pharma\\\",\\r\\n \\\"Tax Planning\\\",\\r\\n \\\"Daily\\\",\\r\\n \\\"Small Cap\\\",\\r\\n \\\"Mid & Small Cap\\\",\\r\\n \\\"Diversified\\\"\\r\\n]\"},{\"alias\":\"icon\",\"value\":\"\\/media\\/1138\\/equity.png\"}],\"releaseDate\":null,\"disabled\":false},{\"alias\":\"categoriesSubCategories\",\"allowedMemberGroups\":\"\",\"id\":\"aabf640c-1ba4-4136-9dd0-79f3dfd6b79b\",\"expireDate\":null,\"properties\":[{\"alias\":\"categories\",\"value\":\"Balanced\"},{\"alias\":\"subCategory\",\"value\":\"[\\r\\n \\\"Debt-Oriented Aggressive\\\",\\r\\n \\\"Debt-Oriented Conservative\\\",\\r\\n \\\"credit opportunities\\\",\\r\\n \\\"Equity Oriented\\\",\\r\\n \\\"Asset Allocation\\\",\\r\\n \\\"Others\\\",\\r\\n \\\"Yearly\\\",\\r\\n \\\"Advance\\\"\\r\\n]\"},{\"alias\":\"icon\",\"value\":\"\\/media\\/1139\\/balanced.png\"}],\"releaseDate\":null,\"disabled\":false},{\"alias\":\"categoriesSubCategories\",\"allowedMemberGroups\":\"\",\"id\":\"fac9c316-16dc-48ab-bc0d-e8c22c02378f\",\"expireDate\":null,\"properties\":[{\"alias\":\"categories\",\"value\":\"Tax Saver\"},{\"alias\":\"subCategory\",\"value\":\"[\\r\\n \\\"Any\\\"\\r\\n]\"},{\"alias\":\"icon\",\"value\":\"\\/media\\/1140\\/tax-saver.png\"}],\"releaseDate\":null,\"disabled\":false},{\"alias\":\"categoriesSubCategories\",\"allowedMemberGroups\":\"\",\"id\":\"ef1efeda-3334-4a9b-bda7-afff76474a40\",\"expireDate\":null,\"properties\":[{\"alias\":\"categories\",\"value\":\"Debt\"},{\"alias\":\"subCategory\",\"value\":\"[\\r\\n \\\"Liquid\\\",\\r\\n \\\"FMP\\\",\\r\\n \\\"Gilt Medium & Long Term\\\",\\r\\n \\\"Gilt Short Term\\\",\\r\\n \\\"Income\\\",\\r\\n \\\"Others\\\",\\r\\n \\\"Short Term\\\",\\r\\n \\\"Ultra Short Term\\\",\\r\\n \\\"Mid Cap\\\",\\r\\n \\\"Small Cap\\\",\\r\\n \\\"Floaters\\\",\\r\\n \\\"Gilt Fund\\\",\\r\\n \\\"Dynamic Bond\\\"\\r\\n]\"},{\"alias\":\"icon\",\"value\":\"\\/media\\/1141\\/debt.png\"}],\"releaseDate\":null,\"disabled\":false}]}

或者没有反斜杠：

{"fieldsets":[{"alias":"categoriesSubCategories","allowedMemberGroups":"","id":"170e1ba0-6f05-4a11-a2a6-04e108e7fa1f","expireDate":null,"properties":[{"alias":"categories","value":"Equity"},{"alias":"subCategory","value":"[\r\n \"Banking\",\r\n \"FMCG\",\r\n \"Infrastructure\",\r\n \"International Funds\",\r\n \"Large Cap\",\r\n \"Large & Mid Cap\",\r\n \"Mid Cap\",\r\n \"Balanced Fund\",\r\n \"Multi Cap\",\r\n \"Others\",\r\n \"Pharma\",\r\n \"Tax Planning\",\r\n \"Daily\",\r\n \"Small Cap\",\r\n \"Mid & Small Cap\",\r\n \"Diversified\"\r\n]"},{"alias":"icon","value":"\/media\/1138\/equity.png"}],"releaseDate":null,"disabled":false},{"alias":"categoriesSubCategories","allowedMemberGroups":"","id":"aabf640c-1ba4-4136-9dd0-79f3dfd6b79b","expireDate":null,"properties":[{"alias":"categories","value":"Balanced"},{"alias":"subCategory","value":"[\r\n \"Debt-Oriented Aggressive\",\r\n \"Debt-Oriented Conservative\",\r\n \"credit opportunities\",\r\n \"Equity Oriented\",\r\n \"Asset Allocation\",\r\n \"Others\",\r\n \"Yearly\",\r\n \"Advance\"\r\n]"},{"alias":"icon","value":"\/media\/1139\/balanced.png"}],"releaseDate":null,"disabled":false},{"alias":"categoriesSubCategories","allowedMemberGroups":"","id":"fac9c316-16dc-48ab-bc0d-e8c22c02378f","expireDate":null,"properties":[{"alias":"categories","value":"Tax Saver"},{"alias":"subCategory","value":"[\r\n \"Any\"\r\n]"},{"alias":"icon","value":"\/media\/1140\/tax-saver.png"}],"releaseDate":null,"disabled":false},{"alias":"categoriesSubCategories","allowedMemberGroups":"","id":"ef1efeda-3334-4a9b-bda7-afff76474a40","expireDate":null,"properties":[{"alias":"categories","value":"Debt"},{"alias":"subCategory","value":"[\r\n \"Liquid\",\r\n \"FMP\",\r\n \"Gilt Medium & Long Term\",\r\n \"Gilt Short Term\",\r\n \"Income\",\r\n \"Others\",\r\n \"Short Term\",\r\n \"Ultra Short Term\",\r\n \"Mid Cap\",\r\n \"Small Cap\",\r\n \"Floaters\",\r\n \"Gilt Fund\",\r\n \"Dynamic Bond\"\r\n]"},{"alias":"icon","value":"\/media\/1141\/debt.png"}],"releaseDate":null,"disabled":false}]}

您可以将第二个传递给JSON验证器，它是有效的。第一个不是真的因为“ \ r \ n” arent正确地逃脱了。

另一方面，对于在JSON中漂亮打印的使用并没有兴趣，我想说的是在JSONStringified中的使用。只需添加标签，新行char，添加杂音和请求的内存即可。

使用字符替换制作有效的jSON字符串

2 个答案: