swift - Parse saveInBackgroundWithBlock additional task -

what want cause save anytime saveinbackgroundwithblock called in app. im doing create "log" of changes , changed it. looked pfobject.h not sure how write in obj-c or else/how other going through , adding every single instance. way it? or should stick out , use harder way?

- (void)saveinbackgroundwithblock:(nullable pfbooleanresultblock)block; 

you have multiple ways in order achieve kind of functionality:

1. create util class receive pfobject , pfbooleanresultblock parameters util class execute call saveinbackgroundwithblock inside callback can implement additional save need. @ end util class should following:

@interface parseutils : nsobject    + (void)saveparseobject:(pfobject *)object block:(pfbooleanresultblock)block;    @end

@implementation parseutils    + (void)saveparseobject:(pfobject *)object block:(pfbooleanresultblock)block {            // if object nil or not changed return      if (!object || !object.isdirty) return;            [object saveinbackgroundwithblock:^(bool succeeded, nserror * _nullable error) {                    // if no error occured          if (!error){                            // here should call additional save...                        }                    // handle callback calling class          if (block){              block(succeeded,error);          }                }];        }    @end

2. another option same singleton (if created rest client singleton project)

3. another nice option create category on top of pfobject , there create method same method of util

there more options think it's enough.. if want quick possible use utilities. if want best architecture go category.