iOS开发数组转json字符串去掉转义字符

- (NSString *)pictureArrayToJSON:(NSArray *)picArr {

    NSData *data=[NSJSONSerialization dataWithJSONObject:picArr options:NSJSONWritingPrettyPrinted error:nil];

    NSString *jsonStr=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

    //去除空格和回车：
    jsonStr = [jsonStr stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    jsonStr = [jsonStr stringByReplacingOccurrencesOfString:@" " withString:[@""](https://my.oschina.net/u/2433434)];
    jsonStr = [jsonStr stringByReplacingOccurrencesOfString:@"\n" withString:[@""](https://my.oschina.net/u/2433434)];
    NSLog(@"jsonStr==%@",jsonStr);
    return jsonStr;
}