数组转为JSON

- (NSString *)idObjectToJson:(id)object{
    NSError *parseError = nil;
    NSData  *jsonData = [NSJSONSerialization dataWithJSONObject:object
                                                        options:NSJSONWritingPrettyPrinted
                                                          error:&parseError];
    NSString *jsonStr=[[NSString alloc]initWithData:jsonData encoding:NSUTF8StringEncoding];
    //去除空格和回车：
    jsonStr = [jsonStr stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    jsonStr = [jsonStr stringByReplacingOccurrencesOfString:@" " withString:@""];
    jsonStr = [jsonStr stringByReplacingOccurrencesOfString:@"\n" withString:@""];
    jsonStr = [jsonStr stringByReplacingOccurrencesOfString:@"\"" withString:@"'"];
    NSLog(@"jsonStr==%@",jsonStr);
    return jsonStr;
    
}