ios 转json字符串

ios 转json字符串相关代码如下：

//把字典和数组转换成json字符串
- (NSString *)stringTOjson:(id)temps
{
    NSData* jsonData =[NSJSONSerialization dataWithJSONObject:temps options:NSJSONWritingPrettyPrinted error:nil];
    NSString *strs=[[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    return strs;
}

    //去掉带换行的,和空格的
    dataStr = [dataStr stringByReplacingOccurrencesOfString:@" " withString:@""];
    dataStr = [dataStr stringByReplacingOccurrencesOfString:@"\n" withString:@""];
    //去掉首尾换行 空格
    detitle.text = [self.descrption stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];