ios 把字符串转换成json字符串

把nsstring转化成jsonStr-(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:@'\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];}

创建一个字符串

吧方法创建好

黏贴到方法里，请忽视警告

打印结果

结果出来了