Objective-C

JSON Escape and Unescape a String

Demonstrates how to JSON escape or unescape a string. Objective-C

#import <CkoStringBuilder.h>

CkoStringBuilder *sb = [[CkoStringBuilder alloc] init];

[sb Append: @"backslash: \\\\, A: \\u0041"];
NSLog(@"%@",[sb GetAsString]);

//  The output is:
//     backslash: \\, A: \u0041

//  The keyword "json" can be used
//  to escape and unescape.  To escape is to encode.  To unescape is to decode.

//  Unescape (decode) the string in sb.
[sb Decode: @"json" charset: @"utf-8"];
NSLog(@"%@",[sb GetAsString]);

//  After JSON unescaping:
//     backslash: \, A: A

//  Now JSON escape the string.
[sb Encode: @"json" charset: @"utf-8"];
NSLog(@"%@",[sb GetAsString]);

//  After JSON escaping:
//     backslash: \\, A: A

//  Note: The "A" is not escaped to "\u0041" because there is no need.
//  The "\uXXXX" format would be produced for non-printable control chars.