How to upload video to Amazon s3 as Multipart video upload iOS on v2.1 -

how upload video amazon s3 multipart upload method. if know or have ideas how solve problem please give me advise.

thanks lot time!

first use urlsession create aws object & handle delegate methods

- (void)initbackgroundurlsessionandaws:(nsstring*)mediaid {     videoid= mediaid;    awsstaticcredentialsprovider *credentialsprovider = [awsstaticcredentialsprovider credentialswithaccesskey:<your access key> secretkey:<your secret key>];     awsserviceconfiguration *configuration = [awsserviceconfiguration configurationwithregion:awsregionuseast1 credentialsprovider:credentialsprovider];     nsurlsessionconfiguration *urlconfiguration;   if ([[[uidevice currentdevice] systemversion] compare:@"8.0" options:nsnumericsearch] == nsorderedascending) {     // ios7 or earlier     urlconfiguration = [nsurlsessionconfiguration backgroundsessionconfiguration:mediaid]; } else {     // ios8 or later     urlconfiguration = [nsurlsessionconfiguration backgroundsessionconfigurationwithidentifier:mediaid]; }       self.urlsession = [nsurlsession sessionwithconfiguration:urlconfiguration delegate:self delegatequeue:nil];      [awsservicemanager defaultservicemanager].defaultserviceconfiguration = configuration;     self.awss3 = [[awss3 alloc] initwithconfiguration:configuration];      nsurl *movieurl = [nsurl urlwithstring:[[nsuserdefaults standarduserdefaults] valueforkey:@"mediaurl"]];       nsstring *path = [nstemporarydirectory() stringbyappendingpathcomponent:@"video.mov"];     nsdata *imagedata = [nsdata datawithcontentsofurl:movieurl];     [imagedata writetofile:path atomically:yes];     nsurl *url = [[nsurl alloc] initfileurlwithpath:path];      awss3getpresignedurlrequest *getpresignedurlrequest = [awss3getpresignedurlrequest new];     getpresignedurlrequest.bucket = <bucket id>;     getpresignedurlrequest.key = [nsstring stringwithformat:@"%@.mov",mediaid];     getpresignedurlrequest.httpmethod = awshttpmethodput;     getpresignedurlrequest.expires = [nsdate datewithtimeintervalsincenow:3600];     //important: must set contenttype put request     getpresignedurlrequest.contenttype = @"movie/mov";      [[[awss3presignedurlbuilder defaults3presignedurlbuilder] getpresignedurl:getpresignedurlrequest] continuewithblock:^id(bftask *task) {             if (task.error)             {                 nslog(@"error bftask: %@", task.error);                 [self showerror];             }             else             {                // [svprogresshud dismiss];                 nsurl *presignedurl = task.result;                 nslog(@"upload presignedurl is: \n%@", presignedurl);              nsmutableurlrequest *request = [nsmutableurlrequest requestwithurl:presignedurl];             request.cachepolicy = nsurlrequestreloadignoringlocalcachedata;             [request sethttpmethod:@"put"];             [request setvalue:@"movie/mov" forhttpheaderfield:@"content-type"];              nsurlsessionuploadtask *uploadtask = [self.urlsession uploadtaskwithrequest:request fromfile:url];              [uploadtask resume];         }         return nil;     }]; }      - (void)urlsession:(nsurlsession *)session task:(nsurlsessiontask *)task didsendbodydata:(int64_t)bytessent totalbytessent:(int64_t)totalbytessent totalbytesexpectedtosend:(int64_t)totalbytesexpectedtosend {         // upload progress         nslog(@"progress : %f", (float) totalbytessent / totalbytesexpectedtosend);       float progress = (float)( totalbytessent / totalbytesexpectedtosend);       [svprogresshud showprogress:progress status:@"uploading video..." masktype:svprogresshudmasktypeblack]; }   - (void)urlsession:(nsurlsession *)session task:(nsurlsessiontask *)task didcompletewitherror:(nserror *)error {     if (error)     {         nslog(@"s3 uploadtask: %@ completed error: %@", task, [error localizeddescription]);          [svprogresshud showerrorwithstatus:@"error in uploding."];     }     else     {          nslog(@"s3 uploadtask: %@ completed @", task);         [self preparevideopffile:videoid];                awss3getpresignedurlrequest not contain acl property, has set after file uploaded         awss3putobjectaclrequest *aclrequest = [awss3putobjectaclrequest new];         aclrequest.bucket = @"your_bucket";         aclrequest.key = @"yout_key";         aclrequest.acl = <key>;          [[self.awss3 putobjectacl:aclrequest] continuewithblock:^id(bftask *bftask) {             dispatch_async(dispatch_get_main_queue(), ^{                 if (bftask.error)                 {                     nslog(@"error putobjectacl: %@", [bftask.error localizeddescription]);                 }                 else                 {                     nslog(@"acl uploaded file changed successfully!");                 }             });             return nil;         }];     } }