File changes in the Documents folder

// When the documents in documents change, start the timer, calculate the size of each second, when the size does not change when the transfer is complete, start to refresh. @property (nonatomic, strong) Nstimer             *timer; // file Size in original documents @property (nonatomic, assign) Nsinteger           filessize; // Documents After the change in size @property (nonatomic, assign) Nsinteger           foundsize;

-(Nstimer *) Timer {    if (!  _timer) {        = [[Nstimer alloc] init];        [_timer setfiredate:[nsdate distantfuture];    }     return _timer;}

- (void) viewdidload {[Super viewdidload]; Self.view.backgroundColor=[Uicolor Whitecolor]; _filemanager=[Nsfilemanager Defaultmanager]; Self.timer= [Nstimer scheduledtimerwithtimeinterval:1. F target:self Selector: @selector (comparesize) Userinfo:nil Repeats:yes];    [Self.timer setfiredate:[nsdate distantfuture]; //* * Monitor files in documents folder for changes    int ConstFolderdescriptor =open ([Kdocumentpath filesystemrepresentation], o_evtonly); dispatch_source_t _directorysource=dispatch_source_create (Dispatch_source_type_vnode, Folderdescriptor, Dispatch_vnode_write, DISPATCH_TARGET_    Queue_default); Dispatch_source_set_event_handler (_directorysource,^{unsignedLong Constdata =Dispatch_source_get_data (_directorysource); if(Data &dispatch_vnode_write) {            //Do all the work on the main thread,//including timer scheduling, notifications deliveringDispatch_async (Dispatch_get_main_queue (), ^{[Self directorydidchanger];        });        }    }); Dispatch_source_set_cancel_handler (_directorysource,^{Close (folderdescriptor);        }); Dispatch_resume (_directorysource);}

//When a file is sent in the Documengs folder- (void) Directorydidchanger {_filessize=[self getsizeoffilepath:kdocumentpath]; Dispatch_after (Dispatch_time (Dispatch_time_now, (int64_t) (1. f * nsec_per_sec)), Dispatch_get_main_queue (), ^{[Self.timer setfiredate:[nsdate Date]];    }); }- (void) Dealloc {//Remove Timer[Self.timer invalidate];}//Get all Files-(Nsarray *) directoryfiles {Nsarray*files =[_filemanager Subpathsatpath:kdocumentpath]; returnfiles;}//Compare file sizes to listen for files that are still being transferred- (void) comparesize {_foundsize=[self getsizeoffilepath:kdocumentpath]; if(_foundsize = = _filessize) {//Refresh the data if the size no longer changes[Self.timer setfiredate:[nsdate distantfuture]; [Self selectdate];        //Start refresh Data } _filessize=_foundsize;}

File changes in the Documents folder