iOS解析JSON字符串报错Error Domain=NSCocoaErrorDomain Code=3840 "Invalid escape sequence around character 586."

将服务器返回的JSON string转化成字典时报错：

Error Domain=NSCocoaErrorDomain Code=3840 "Invalid escape sequence around character 586."

仔细查找后在原来解析的基础上将"\"字符替换成""或"\\"后,解析成功。具体的解析代码如下：

- (NSDictionary *)parseJsonStringToNSDictionary:(NSString *)jsonString
{

    jsonString = [jsonString stringByReplacingOccurrencesOfString:@"\r\n" withString:@""];
    jsonString = [jsonString stringByReplacingOccurrencesOfString:@"\n" withString:@""];
    jsonString = [jsonString stringByReplacingOccurrencesOfString:@"\t" withString:@""];
jsonString = [jsonString stringByReplacingOccurrencesOfString:@"\\" withString:@""];

    NSError *error2=nil;
    NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:[jsonString dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:&error2];
    if ([dict isValid]) {
        return dict;
    }
    return nil;
}