json解析 回车符数据过滤的正确姿势

+(NSString *)ReplacingNewLineAndWhitespaceCharactersFromJson:(NSString *)dataStr{

NSScanner *scanner = [[NSScanner alloc] initWithString:dataStr];

[scanner setCharactersToBeSkipped:nil];

NSMutableString *result = [[NSMutableString alloc] init];

NSString *temp;

NSCharacterSet*newLineAndWhitespaceCharacters = [ NSCharacterSet newlineCharacterSet];

// 扫描

while (![scanner isAtEnd])

{

temp = nil;

[scanner scanUpToCharactersFromSet:newLineAndWhitespaceCharacters intoString:&temp];

if (temp) [result appendString:temp];

// 替换换行符

if ([scanner scanCharactersFromSet:newLineAndWhitespaceCharacters intoString:NULL]) {

if (result.length > 0 && ![scanner isAtEnd]) // Dont append space to beginning or end of result

[result appendString:@"|"];

}

}

return result;

}