JSON解析错误

Question

我正在为iOS使用SBJson框架(也称为json-framework).

解析某个JSON文件时,我收到以下错误: -JSONValue失败.错误是:未转义的控制字符[0x09] '

我已经多次使用过这个框架,我也在同一个应用程序中解析一个非常相似的JSON文件(甚至更长),并且它工作正常.

我试着扔掉一堆NSLog,一切似乎都很好.有人可以指出这个错误意味着什么,或者至少如何继续调试这样的错误？

以下是显示错误的代码:

- (void)downloadSchedule:(NSString *)jsonString {

    // Get JSON feed URL and instantiate a dictionary object with its content
    NSDictionary *topDic = [jsonString JSONValue];

    NSLog(@"topDic count %d", [topDic count]);

topDic显示的计数为0.错误在该[jsonString JSONValue]行.

谢谢

Answer 1

我有一个很好的解决方案.应用此方法删除转义字符.

-(NSString *)removeUnescapedCharacter:(NSString *)inputStr
{

NSCharacterSet *controlChars = [NSCharacterSet controlCharacterSet];

NSRange range = [inputStr rangeOfCharacterFromSet:controlChars];

  if (range.location != NSNotFound) 
  {

      NSMutableString *mutable = [NSMutableString stringWithString:inputStr];

      while (range.location != NSNotFound) 
      {

          [mutable deleteCharactersInRange:range];

          range = [mutable rangeOfCharacterFromSet:controlChars];

      }

      return mutable;

   }

  return inputStr;
}

像这样传递输出字符串来调用此方法

NSString *output = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"yourUrlString"] encoding:NSUTF8StringEncoding error:nil];

output = [self removeUnescapedCharacter:output];