update sf obj/rec in salesforce

updateObj.m

    ZKSObject *sfobj = [[ZKSObject alloc] initWithType:@"Your_custom_object__c"] ;    
    
    [sfobj setType:@"Your_custom_object__c"];
    [sfobj setFieldValue:@"a0FM0000000XrKcMAK" field:@"Id"];
    [sfobj setFieldValue:@"PAL-008" field:@"Service_code__c"]; 
    [sfobj setFieldValue:@"Room heating system" field:@"Name"];   //update the field value required
    [sfobj setFieldValue:@"Maintenance" field:@"Service_Status__c"];
    [sfobj setFieldValue:@"a07M0000000FV5VIAW" field:@"child_of_another_custom_object__c"];
    
     [[FDCServerSwitchboard switchboard] update:[NSArray arrayWithObject:sfobj] target:self selector:@selector(updatedObjectResult:error:context:) context:nil];