4

我有一个可能包含引号、\、/、\r、\n 的 NSString，我想将它转换为 JSON 编码的字符串，所以像这样的字符串

“文本1\文本2”

变成

\"文本1\\文本2\"

是否有现有功能可以让我这样做？

另外，我在我的项目中使用 SBJson，但我找不到 SBJson 是否可以这样做。

NSJSONSerialization 不在桌面上，因为我的应用程序仍然需要支持 OSX 10.6

4

4 回答 4

13

这回答了你的问题了吗？

-(NSString *)JSONString:(NSString *)aString {
    NSMutableString *s = [NSMutableString stringWithString:aString];
    [s replaceOccurrencesOfString:@"\\" withString:@"\\\\" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\"" withString:@"\\\"" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"/" withString:@"\\/" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\n" withString:@"\\n" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\b" withString:@"\\b" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\f" withString:@"\\f" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\r" withString:@"\\r" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    [s replaceOccurrencesOfString:@"\t" withString:@"\\t" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
    return [NSString stringWithString:s];
}

来源：将 NSString 转换为 JSON 字符串

于 2013-04-05T21:11:04.303 回答
3

让我们以更原生的 JSON 方式来做吧；）

如果您喜欢我的回答，请在https://github.com/wanjochan给我加注星标

//trick: id(@[s]) => string => trim [] => target
//NSString *s
s=[[NSString alloc] initWithData:
  [NSJSONSerialization dataWithJSONObject:@[s] options:0 error:nil]
  encoding:NSUTF8StringEncoding];
s=[[s substringToIndex:([s length]-1)] substringFromIndex:1];
于 2016-11-15T13:31:16.367 回答
0

斯威夫特 2：

/// Escape reserved characters to produce a valid JSON String
/// For example double quotes `"` are replaced by `\"`
/// - parameters:
///   - String: an unescaped string
/// - returns: valid escaped JSON string
func JSONString(str: String?) -> String? {
    var result : String? = nil
    if let str = str {
        result = str
            .stringByReplacingOccurrencesOfString("\"", withString: "\\\"", options: .CaseInsensitiveSearch)
            .stringByReplacingOccurrencesOfString("/", withString: "\\/", options: .CaseInsensitiveSearch)
            .stringByReplacingOccurrencesOfString("\n", withString: "\\n", options: .CaseInsensitiveSearch)
            .stringByReplacingOccurrencesOfString("\u{8}", withString: "\\b", options: .CaseInsensitiveSearch)
            .stringByReplacingOccurrencesOfString("\u{12}", withString: "\\f", options: .CaseInsensitiveSearch)
            .stringByReplacingOccurrencesOfString("\r", withString: "\\r", options: .CaseInsensitiveSearch)
            .stringByReplacingOccurrencesOfString("\t", withString: "\\t", options: .CaseInsensitiveSearch)
    }
    return result
}

斯威夫特 3：

func JSONString(str: String) -> String {
    var result = str
    result = result.replacingOccurrences(of: "\"", with: "\\\"")
        .replacingOccurrences(of: "/", with: "\\/")
        .replacingOccurrences(of: "\n", with: "\\n")
        .replacingOccurrences(of: "\u{8}", with: "\\b")
        .replacingOccurrences(of: "\u{12}", with: "\\f")
        .replacingOccurrences(of: "\r", with: "\\r")
        .replacingOccurrences(of: "\t", with: "\\t")

    return result
}

对防止错误非常有用：Domain=NSCocoaErrorDomain Code=3840 "Invalid escape sequence around character 123."

于 2016-09-10T18:05:17.173 回答
0

斯威夫特 4 解决方案

extension String {
    var stringEncodedJSON: String {
        var copy = self
        let encodingDict: [String: String] = ["\"": "\\\"", "/": "\\/", "\n": "\\n", "\u{8}": "\\b","\u{12}": "\\f", "\r": "\\r", "\t": "\\t"]
        encodingDict.forEach({ copy = copy.replacingOccurrences(of: $0, with: $1) })
        return copy
    }
}
于 2017-10-23T18:46:43.617 回答